fix bug for yang comparator and refactor yang compiler

Issue-ID: MODELING-680
Change-Id: I3a04b24d6b02aff2a376c95d6f7508294b65aa57
Signed-off-by: frank feng <frank.fengchong@huawei.com>

33 files changed, 4233 insertions, 3331 deletions

diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/catalog/ModuleInfo.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/catalog/ModuleInfo.java
index 31bb51e..5e128a3 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/catalog/ModuleInfo.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/catalog/ModuleInfo.java
@@ -27,14 +27,15 @@ import java.net.URI;
 public class ModuleInfo {

     private final String name;

     private final String revision;

-    private final String organization;

+    private String organization;

     private URI schema;

 

     /**

      * The constructor of ModuleInfo.

-     * @param name module name

-     * @param revision module revision

-     * @param organization  the organization who publish this module

+     *

+     * @param name         module name

+     * @param revision     module revision

+     * @param organization the organization who publish this module

      */

     public ModuleInfo(String name, String revision, String organization) {

         this.name = name;

@@ -42,16 +43,18 @@ public class ModuleInfo {
         this.organization = organization;

     }

 

-    /**

-     *  set schema.

-     * @param schema the URI of schema

-     */

+    public ModuleInfo(String name, String revision) {

+        this.name = name;

+        this.revision = revision;

+    }

+

     public void setSchema(URI schema) {

         this.schema = schema;

     }

 

     /**

      * get module name.

+     *

      * @return module name

      */

     public String getName() {

@@ -60,6 +63,7 @@ public class ModuleInfo {
 

     /**

      * get module's revision.

+     *

      * @return revision

      */

     public String getRevision() {

@@ -68,6 +72,7 @@ public class ModuleInfo {
 

     /**

      * get organization.

+     *

      * @return organization

      */

     public String getOrganization() {

@@ -76,6 +81,7 @@ public class ModuleInfo {
 

     /**

      * get schema.

+     *

      * @return URI

      */

     public URI getSchema() {

@@ -83,7 +89,30 @@ public class ModuleInfo {
     }

 

     /**

+     * whether this module info with revision.

+     * @return true or false

+     */

+    public boolean withRevision() {

+        if (revision != null && !revision.isEmpty()) {

+            return true;

+        }

+        return false;

+    }

+

+    /**

+     * get the module information string.

+     * @return module information

+     */

+    public String getModuleInfo() {

+        if (withRevision()) {

+            return name + "@" + revision;

+        }

+        return name;

+    }

+

+    /**

      * parse module info from json.

+     *

      * @param element json element

      * @return ModuleInfo

      */

@@ -101,16 +130,17 @@ public class ModuleInfo {
             return null;

         }

         URI schema = URI.create(schemaElement.getAsString());

-        if (name == null || revision == null) {

+        if (name == null || revision == null || schema == null) {

             return null;

         }

-        ModuleInfo moduleInfo = new ModuleInfo(name,revision,organization);

+        ModuleInfo moduleInfo = new ModuleInfo(name, revision, organization);

         moduleInfo.setSchema(schema);

         return moduleInfo;

     }

 

     /**

      * parse module information from json string.

+     *

      * @param str json string

      * @return Module information

      */

diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/BuildOption.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/BuildOption.java
new file mode 100644
index 0000000..328d2a4
--- /dev/null
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/BuildOption.java
@@ -0,0 +1,174 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onap.modeling.yangkit.catalog.ModuleInfo;
+
+
+
+
+public class BuildOption {
+    private List<Source> sources = new ArrayList<>();
+    private List<Plugin> plugins = new ArrayList<>();
+
+    private String settings;
+
+    /**
+     * the constructor.
+     */
+    public BuildOption() {
+    }
+
+    /**
+     * get all sources.
+     * @return list of sources
+     */
+    public List<Source> getSources() {
+        return sources;
+    }
+
+    /**
+     * add a source to build option.
+     * @param source candidate source
+     */
+    public void addSource(Source source) {
+        if (sources.contains(source)) {
+            return;
+        }
+        sources.add(source);
+    }
+
+    /**
+     * get plugins of build option.
+     * @return list of plugins
+     */
+    public List<Plugin> getPlugins() {
+        return plugins;
+    }
+
+    /**
+     * set the list of plugins.
+     *
+     * @param plugins the list of plugins
+     */
+    public void setPlugins(List<Plugin> plugins) {
+        this.plugins = plugins;
+    }
+
+    /**
+     * add a plugin.
+     *
+     * @param plugin plugin to be added.
+     */
+    public void addPlugin(Plugin plugin) {
+        this.plugins.add(plugin);
+    }
+
+    public String getSettings() {
+        return settings;
+    }
+
+    public void setSettings(String settings) {
+        this.settings = settings;
+    }
+
+    /**
+     * parse the build.json.
+     *
+     * @param jsonElement json element
+     * @return builder structure
+     */
+    public static BuildOption parse(JsonElement jsonElement) {
+        BuildOption buildOption = new BuildOption();
+        JsonObject jsonObject = jsonElement.getAsJsonObject();
+
+        JsonElement yangElement = jsonObject.get("yang");
+        if (yangElement != null) {
+            JsonObject yang = yangElement.getAsJsonObject();
+            JsonElement dirElement = yang.get("dir");
+            if (dirElement != null) {
+                JsonArray dirArray = dirElement.getAsJsonArray();
+                List<JsonElement> dirElementList = dirArray.asList();
+                List<String> dirs = new ArrayList<>();
+                for (JsonElement dirElementItem : dirElementList) {
+                    String yangDir = dirElementItem.getAsString();
+                    dirs.add(yangDir);
+                }
+                DirectorySource directorySource = new DirectorySource(dirs);
+                buildOption.addSource(directorySource);
+            }
+            JsonElement filesElement = yang.get("file");
+            if (filesElement != null) {
+                JsonArray fileArray = filesElement.getAsJsonArray();
+                List<JsonElement> fileElementList = fileArray.asList();
+                List<String> files = new ArrayList<>();
+                for (JsonElement fileElementItem : fileElementList) {
+                    String yangFile = fileElementItem.getAsString();
+                    files.add(yangFile);
+                }
+                FileSource fileSource = new FileSource(files);
+                buildOption.addSource(fileSource);
+            }
+            JsonElement modulesElement = yang.get("module");
+            if (modulesElement != null) {
+                JsonArray moduleArray = modulesElement.getAsJsonArray();
+                List<JsonElement> moduleList = moduleArray.asList();
+                List<ModuleInfo> moduleInfos = new ArrayList<>();
+                for (JsonElement moduleElement : moduleList) {
+                    JsonObject moduleObject = moduleElement.getAsJsonObject();
+                    String name = moduleObject.get("name").getAsString();
+                    String revision = moduleObject.get("revision").getAsString();
+                    String organization = null;
+                    if (moduleObject.get("organization") != null) {
+                        organization = moduleObject.get("organization").getAsString();
+                    }
+                    URI schema = null;
+                    if (moduleObject.get("schema") != null) {
+                        schema = URI.create(moduleObject.get("schema").getAsString());
+                    }
+                    ModuleInfo moduleInfo = new ModuleInfo(name, revision, organization);
+                    moduleInfo.setSchema(schema);
+                    moduleInfos.add(moduleInfo);
+                }
+                ModuleSource moduleSource = new ModuleSource(moduleInfos);
+                buildOption.addSource(moduleSource);
+            }
+        }
+        JsonElement settingsElement = jsonObject.get("settings");
+        if (settingsElement != null) {
+            buildOption.setSettings(settingsElement.getAsString());
+        }
+        JsonElement pluginsElement = jsonObject.get("plugin");
+        if (pluginsElement != null) {
+            JsonArray plugins = pluginsElement.getAsJsonArray();
+            for (int i = 0; i < plugins.size(); i++) {
+                JsonElement pluginElement = plugins.get(i);
+                Plugin plugin = Plugin.parse(pluginElement);
+                buildOption.addPlugin(plugin);
+            }
+        }
+        return buildOption;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Builder.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Builder.java
deleted file mode 100644
index 7436447..0000000
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Builder.java
+++ /dev/null
@@ -1,112 +0,0 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.compiler;

-

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-

-import java.util.ArrayList;

-import java.util.List;

-

-

-public class Builder {

-    private String yangDir;

-    private List<PluginBuilder> plugins = new ArrayList<>();

-

-    /**

-     * the constructor.

-     */

-    public Builder() {

-    }

-

-    /**

-     * get yang directory where the yang files to be compiled exist.

-     *

-     * @return the directory path

-     */

-    public String getYangDir() {

-        return yangDir;

-    }

-

-    /**

-     * set the yang directory.

-     *

-     * @param yangDir the path of yang directory

-     */

-    public void setYangDir(String yangDir) {

-        this.yangDir = yangDir;

-    }

-

-    /**

-     * get the plugins.

-     *

-     * @return the list of plugins

-     */

-    public List<PluginBuilder> getPlugins() {

-        return plugins;

-    }

-

-    /**

-     * set the list of plugins.

-     *

-     * @param plugins the list of plugins

-     */

-    public void setPlugins(List<PluginBuilder> plugins) {

-        this.plugins = plugins;

-    }

-

-    /**

-     * add a plugin.

-     *

-     * @param pluginBuilder plugin to be added.

-     */

-    public void addPlugin(PluginBuilder pluginBuilder) {

-        this.plugins.add(pluginBuilder);

-    }

-

-    /**

-     * parse the build.json.

-     *

-     * @param jsonElement json element

-     * @return builder structure

-     */

-    public static Builder parse(JsonElement jsonElement) {

-        JsonObject jsonObject = jsonElement.getAsJsonObject();

-        JsonElement buildElement = jsonObject.get("build");

-        Builder builder = new Builder();

-        if (buildElement == null) {

-            return builder;

-        }

-        JsonObject buildObj = buildElement.getAsJsonObject();

-        JsonElement yangElement = buildObj.get("yang");

-        if (yangElement != null) {

-            String yang = yangElement.getAsString();

-            builder.setYangDir(yang);

-        }

-        JsonElement pluginsElement = buildObj.get("plugin");

-        if (pluginsElement != null) {

-            JsonArray plugins = pluginsElement.getAsJsonArray();

-            for (int i = 0; i < plugins.size(); i++) {

-                JsonElement pluginElement = plugins.get(i);

-                PluginBuilder pluginBuilder = PluginBuilder.parse(pluginElement);

-                builder.addPlugin(pluginBuilder);

-            }

-        }

-        return builder;

-    }

-}

diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/DirectorySource.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/DirectorySource.java
new file mode 100644
index 0000000..e1c5019
--- /dev/null
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/DirectorySource.java
@@ -0,0 +1,84 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onap.modeling.yangkit.catalog.ModuleInfo;
+import org.onap.modeling.yangkit.compiler.util.YangCompilerUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+import org.yangcentral.yangkit.model.api.stmt.Module;
+import org.yangcentral.yangkit.parser.YangYinParser;
+
+
+
+public class DirectorySource implements Source {
+    private List<String> dirs = new ArrayList<>();
+    private static final Logger logger = LoggerFactory.getLogger(DirectorySource.class);
+
+    public DirectorySource(List<String> dirs) {
+        this.dirs = dirs;
+    }
+
+
+    @Override
+    public YangSchemaContext buildSource(Settings settings, YangSchemaContext yangSchemaContext)
+            throws YangCompilerException {
+        return buildSource(settings, yangSchemaContext, false);
+    }
+
+    @Override
+    public YangSchemaContext buildSource(Settings settings, YangSchemaContext schemaContext, boolean withDependencies)
+            throws YangCompilerException {
+        for (String dir : dirs) {
+            try {
+                logger.info("start to build schema context for dir:" + dir);
+                schemaContext = YangYinParser.parse(dir, schemaContext);
+                if (withDependencies) {
+                    logger.info("start to build dependencies for dir:" + dir);
+                    for (Module module : schemaContext.getModules()) {
+                        if (!module.getElementPosition().getSource().contains(dir)) {
+                            continue;
+                        }
+                        List<ModuleInfo> dependencies = YangCompilerUtil.getDependencies(module);
+                        if (!dependencies.isEmpty()) {
+                            List<ModuleInfo> extraDependencies = new ArrayList<>();
+                            for (ModuleInfo dependency : dependencies) {
+                                if (schemaContext.getModule(dependency.getName(), dependency.getRevision())
+                                        .isPresent()) {
+                                    continue;
+                                }
+                                extraDependencies.add(dependency);
+                            }
+                            ModuleSource extraDependenciesSource = new ModuleSource(extraDependencies, true);
+                            schemaContext = extraDependenciesSource.buildSource(settings, schemaContext, true);
+                        }
+                    }
+                    logger.info("end to build dependencies for dir:" + dir);
+                }
+                logger.info("end to build schema context for dir:" + dir);
+            } catch (Exception e) {
+                throw new YangCompilerException(e.getMessage());
+            }
+        }
+        return schemaContext;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/FileSource.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/FileSource.java
new file mode 100644
index 0000000..a6f26bc
--- /dev/null
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/FileSource.java
@@ -0,0 +1,84 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onap.modeling.yangkit.catalog.ModuleInfo;
+import org.onap.modeling.yangkit.compiler.util.YangCompilerUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+import org.yangcentral.yangkit.model.api.stmt.Module;
+import org.yangcentral.yangkit.parser.YangYinParser;
+
+
+public class FileSource implements Source {
+    private List<String> files;
+    private static final Logger logger = LoggerFactory.getLogger(FileSource.class);
+
+    public FileSource(List<String> files) {
+        this.files = files;
+    }
+
+    @Override
+    public YangSchemaContext buildSource(Settings settings, YangSchemaContext yangSchemaContext)
+            throws YangCompilerException {
+        return buildSource(settings, yangSchemaContext, false);
+    }
+
+    @Override
+    public YangSchemaContext buildSource(Settings settings, YangSchemaContext schemaContext, boolean withDependencies)
+            throws YangCompilerException {
+        List<File> fileList = new ArrayList<>();
+        for (String file : files) {
+            fileList.add(new File(file));
+        }
+        try {
+            logger.info("start to build schema context for files:" + files);
+            schemaContext = YangYinParser.parse(fileList, schemaContext);
+            if (withDependencies) {
+                logger.info("start to build dependencies for files:" + files);
+                for (Module module : schemaContext.getModules()) {
+                    String source = module.getElementPosition().getSource();
+                    if (!files.contains(source)) {
+                        continue;
+                    }
+                    List<ModuleInfo> dependencies = YangCompilerUtil.getDependencies(module);
+                    if (!dependencies.isEmpty()) {
+                        List<ModuleInfo> extraDependencies = new ArrayList<>();
+                        for (ModuleInfo dependency : dependencies) {
+                            if (schemaContext.getModule(dependency.getName(), dependency.getRevision()).isPresent()) {
+                                continue;
+                            }
+                            extraDependencies.add(dependency);
+                        }
+                        ModuleSource extraDependenciesSource = new ModuleSource(extraDependencies, true);
+                        schemaContext = extraDependenciesSource.buildSource(settings, schemaContext, true);
+                    }
+                }
+                logger.info("end to build dependencies for files:" + files);
+            }
+            logger.info("end to build schema context for files:" + files);
+            return schemaContext;
+        } catch (Exception e) {
+            throw new YangCompilerException(e.getMessage());
+        }
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/ModuleSource.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/ModuleSource.java
new file mode 100644
index 0000000..96977da
--- /dev/null
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/ModuleSource.java
@@ -0,0 +1,153 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+import org.onap.modeling.yangkit.catalog.ModuleInfo;
+import org.onap.modeling.yangkit.compiler.util.YangCompilerUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.yangcentral.yangkit.model.api.schema.ModuleId;
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+import org.yangcentral.yangkit.model.api.stmt.Module;
+import org.yangcentral.yangkit.parser.YangYinParser;
+import org.yangcentral.yangkit.utils.file.FileUtil;
+
+
+public class ModuleSource implements Source {
+    private List<ModuleInfo> modules;
+
+    private boolean importOnly;
+    private static final Logger logger = LoggerFactory.getLogger(ModuleSource.class);
+
+    public ModuleSource(List<ModuleInfo> modules) {
+        this.modules = modules;
+    }
+
+    public ModuleSource(List<ModuleInfo> modules, boolean importOnly) {
+        this.modules = modules;
+        this.importOnly = importOnly;
+    }
+
+    public boolean isImportOnly() {
+        return importOnly;
+    }
+
+    public void setImportOnly(boolean importOnly) {
+        this.importOnly = importOnly;
+    }
+
+    public List<ModuleInfo> getModules() {
+        return modules;
+    }
+
+    @Override
+    public YangSchemaContext buildSource(Settings settings, YangSchemaContext yangSchemaContext)
+            throws YangCompilerException {
+        return buildSource(settings, yangSchemaContext, false);
+    }
+
+    @Override
+    public YangSchemaContext buildSource(Settings settings, YangSchemaContext schemaContext, boolean withDependencies)
+            throws YangCompilerException {
+        ModuleInfo targetModuleInfo = null;
+        for (ModuleInfo moduleInfo : modules) {
+            if (schemaContext != null) {
+                Optional<Module> oldModule = schemaContext.getModule(
+                        new ModuleId(moduleInfo.getName(), moduleInfo.getRevision()));
+                if (oldModule.isPresent()) {
+                    if (!importOnly && schemaContext.isImportOnly(oldModule.get())) {
+                        schemaContext.removeModule(oldModule.get().getModuleId());
+                        schemaContext.addModule(oldModule.get());
+                    }
+                    continue;
+                }
+            }
+            URI schema = moduleInfo.getSchema();
+            if (schema == null) {
+                try {
+                    targetModuleInfo = YangCompilerUtil.getSchema(moduleInfo, settings);
+                } catch (IOException e) {
+                    throw new YangCompilerException(e.getMessage());
+                }
+                if (targetModuleInfo == null) {
+                    throw new YangCompilerException("module="
+                            + moduleInfo.getModuleInfo()
+                            + " is not found.");
+                }
+                schema = targetModuleInfo.getSchema();
+            }
+            if (targetModuleInfo == null) {
+                targetModuleInfo = moduleInfo;
+            }
+
+
+            try {
+                logger.info("download yang from " + schema.toURL());
+                String yangString = YangCompilerUtil.urlInvoke2String(schema.toURL().toString(), settings);
+
+                InputStream inputStream = new ByteArrayInputStream(yangString.getBytes());
+                String parseModuleInfo = schema.toURL().toString();
+                schemaContext = YangYinParser.parse(inputStream,
+                        parseModuleInfo, true, importOnly, schemaContext);
+                //judge whether this module exists in local repository
+                if (YangCompilerUtil.getSchemaFromLocal(targetModuleInfo, settings) == null) {
+                    // if not found, install to local repository
+                    String fileName = settings.getLocalRepository() + File.separator + targetModuleInfo.getModuleInfo()
+                            + ".yang";
+                    FileUtil.writeUtf8File(fileName, yangString);
+                    logger.info("install " + targetModuleInfo.getModuleInfo() + ".yang to "
+                            + settings.getLocalRepository());
+                }
+                if (withDependencies) {
+                    logger.info("get dependencies for " + targetModuleInfo.getModuleInfo());
+                    Module sourceModule =
+                            schemaContext.getModule(targetModuleInfo.getName(), targetModuleInfo.getRevision())
+                                    .get();
+
+                    List<ModuleInfo> dependencies = YangCompilerUtil.getDependencies(sourceModule);
+                    if (!dependencies.isEmpty()) {
+                        List<ModuleInfo> extraDependencies = new ArrayList<>();
+                        for (ModuleInfo dependency : dependencies) {
+                            if (schemaContext.getModule(dependency.getName(), dependency.getRevision()).isPresent()) {
+                                continue;
+                            }
+                            extraDependencies.add(dependency);
+                        }
+                        ModuleSource extraDependenciesSource = new ModuleSource(extraDependencies, true);
+                        logger.info("start to build dependencies for " + targetModuleInfo.getModuleInfo());
+                        schemaContext = extraDependenciesSource.buildSource(settings, schemaContext, true);
+                        logger.info("end to build dependencies for " + targetModuleInfo.getModuleInfo());
+                    }
+                }
+
+            } catch (Exception e) {
+                throw new YangCompilerException(e.getMessage());
+            }
+        }
+        return schemaContext;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/ParameterBuilder.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Parameter.java
index ea8ad7a..54f9236 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/ParameterBuilder.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Parameter.java
@@ -1,69 +1,71 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.compiler;

-

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-

-

-public class ParameterBuilder {

-    private final String name;

-    private final String value;

-

-    /**

-     * the constructor.

-     *

-     * @param name  the name of parameter

-     * @param value the value of parameter

-     */

-    public ParameterBuilder(String name, String value) {

-        this.name = name;

-        this.value = value;

-    }

-

-    /**

-     * get the parameter name.

-     *

-     * @return name

-     */

-    public String getName() {

-        return name;

-    }

-

-    /**

-     * get the parameter value.

-     *

-     * @return value

-     */

-    public String getValue() {

-        return value;

-    }

-

-    /**

-     * parse parameter from json.

-     *

-     * @param jsonElement json element

-     * @return parameter

-     */

-    public static ParameterBuilder parse(JsonElement jsonElement) {

-        JsonObject jsonObject = jsonElement.getAsJsonObject();

-        String name = jsonObject.get("name").getAsString();

-        String value = jsonObject.get("value").getAsString();

-        ParameterBuilder parameterBuilder = new ParameterBuilder(name, value);

-        return parameterBuilder;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+public class Parameter {
+    private String name;
+    private JsonElement value;
+
+    /**
+     * the constructor.
+     *
+     * @param name  the name of parameter
+     * @param value the value of parameter
+     */
+    public Parameter(String name, JsonElement value) {
+        this.name = name;
+        this.value = value;
+    }
+
+    /**
+     * get the parameter name.
+     *
+     * @return name
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * get the parameter value.
+     *
+     * @return value
+     */
+    public JsonElement getValue() {
+        return value;
+    }
+
+    /**
+     * parse parameter from json.
+     *
+     * @param jsonElement json element
+     * @return parameter
+     */
+    public static Parameter parse(JsonElement jsonElement) {
+        JsonObject jsonObject = jsonElement.getAsJsonObject();
+        String name = jsonObject.get("name").getAsString();
+        JsonElement value = null;
+        if (jsonObject.get("value") != null) {
+            value = jsonObject.get("value");
+        }
+        Parameter parameter = new Parameter(name, value);
+        return parameter;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/PluginBuilder.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Plugin.java
index 489d1f7..91939a4 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/PluginBuilder.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Plugin.java
@@ -1,86 +1,85 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.compiler;

-

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-

-import java.util.ArrayList;

-import java.util.List;

-

-

-public class PluginBuilder {

-    private final String name;

-    private final List<ParameterBuilder> parameters = new ArrayList<>();

-

-    /**

-     * the constructor.

-     *

-     * @param name the plugin name

-     */

-    public PluginBuilder(String name) {

-        this.name = name;

-    }

-

-    /**

-     * get the plugin name.

-     *

-     * @return name

-     */

-    public String getName() {

-        return name;

-    }

-

-    /**

-     * get all parameters of plugin.

-     *

-     * @return the list of parameters

-     */

-    public List<ParameterBuilder> getParameters() {

-        return parameters;

-    }

-

-    /**

-     * add parameter into plugin.

-     *

-     * @param para parameter

-     */

-    public void addParameter(ParameterBuilder para) {

-        parameters.add(para);

-    }

-

-    /**

-     * parse plugin from json.

-     *

-     * @param jsonElement json element

-     * @return plugin builder

-     */

-    public static PluginBuilder parse(JsonElement jsonElement) {

-        String name = jsonElement.getAsJsonObject().get("name").getAsString();

-        PluginBuilder pluginBuilder = new PluginBuilder(name);

-        JsonElement parasElement = jsonElement.getAsJsonObject().get("parameter");

-        if (parasElement != null) {

-            JsonArray paras = parasElement.getAsJsonArray();

-            for (int i = 0; i < paras.size(); i++) {

-                JsonElement paraElement = paras.get(i);

-                ParameterBuilder parameterBuilder = ParameterBuilder.parse(paraElement);

-                pluginBuilder.addParameter(parameterBuilder);

-            }

-        }

-        return pluginBuilder;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Plugin {
+    private String name;
+    private List<Parameter> parameters = new ArrayList<>();
+
+    /**
+     * the constructor.
+     *
+     * @param name the plugin name
+     */
+    public Plugin(String name) {
+        this.name = name;
+    }
+
+    /**
+     * get the plugin name.
+     *
+     * @return name
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * get all parameters of plugin.
+     *
+     * @return the list of parameters
+     */
+    public List<Parameter> getParameters() {
+        return parameters;
+    }
+
+    /**
+     * add parameter into plugin.
+     *
+     * @param para parameter
+     */
+    public void addParameter(Parameter para) {
+        parameters.add(para);
+    }
+
+    /**
+     * parse plugin from json.
+     *
+     * @param jsonElement json element
+     * @return plugin builder
+     */
+    public static Plugin parse(JsonElement jsonElement) {
+        String name = jsonElement.getAsJsonObject().get("name").getAsString();
+        Plugin plugin = new Plugin(name);
+        JsonElement parasElement = jsonElement.getAsJsonObject().get("parameter");
+        if (parasElement != null) {
+            JsonArray paras = parasElement.getAsJsonArray();
+            for (int i = 0; i < paras.size(); i++) {
+                JsonElement paraElement = paras.get(i);
+                Parameter parameter = Parameter.parse(paraElement);
+                plugin.addParameter(parameter);
+            }
+        }
+        return plugin;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/PluginInfo.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/PluginInfo.java
index a042dd0..63b82ef 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/PluginInfo.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/PluginInfo.java
@@ -32,7 +32,7 @@ import java.nio.file.Paths;
 import java.util.ArrayList;

 import java.util.List;

 

-import org.onap.modeling.yangkit.plugin.YangCompilerPlugin;

+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPlugin;

 

 

 @SuppressWarnings("ALL")

diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Source.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Source.java
new file mode 100644
index 0000000..f3443ed
--- /dev/null
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/Source.java
@@ -0,0 +1,26 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler;
+
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+
+public interface Source {
+    YangSchemaContext buildSource(Settings settings, YangSchemaContext yangSchemaContext) throws YangCompilerException;
+
+    YangSchemaContext buildSource(Settings settings, YangSchemaContext yangSchemaContext, boolean withDependencies)
+            throws YangCompilerException;
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/YangCompiler.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/YangCompiler.java
index 7d4975d..87a1c5e 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/YangCompiler.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/YangCompiler.java
@@ -16,52 +16,28 @@ limitations under the License.
 

 package org.onap.modeling.yangkit.compiler;

 

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-import com.google.gson.JsonParser;

+

 

 import java.io.File;

-import java.io.FilenameFilter;

-import java.io.IOException;

-import java.io.InputStream;

-import java.net.Authenticator;

-import java.net.InetSocketAddress;

-import java.net.PasswordAuthentication;

-import java.net.Proxy;

-import java.net.URI;

-import java.net.URISyntaxException;

-import java.net.URL;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Map;

-import java.util.Properties;

-import java.util.Scanner;

 import java.util.concurrent.ConcurrentHashMap;

-import javax.annotation.Nullable;

-

 

-import org.dom4j.DocumentException;

 import org.onap.modeling.yangkit.catalog.ModuleInfo;

-import org.onap.modeling.yangkit.catalog.YangCatalog;

-import org.onap.modeling.yangkit.plugin.YangCompilerPlugin;

-import org.onap.modeling.yangkit.plugin.YangCompilerPluginParameter;

-import org.yangcentral.yangkit.base.YangBuiltinKeyword;

+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPlugin;

+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPluginParameter;

+import org.onap.modeling.yangkit.compiler.util.YangCompilerUtil;

+import org.slf4j.Logger;

+import org.slf4j.LoggerFactory;

 import org.yangcentral.yangkit.base.YangElement;

 import org.yangcentral.yangkit.common.api.validate.ValidatorRecord;

 import org.yangcentral.yangkit.common.api.validate.ValidatorResult;

 import org.yangcentral.yangkit.common.api.validate.ValidatorResultBuilder;

-import org.yangcentral.yangkit.model.api.schema.ModuleId;

 import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;

 import org.yangcentral.yangkit.model.api.stmt.Module;

-import org.yangcentral.yangkit.model.api.stmt.SubModule;

 import org.yangcentral.yangkit.model.api.stmt.YangStatement;

-import org.yangcentral.yangkit.parser.YangParser;

-import org.yangcentral.yangkit.parser.YangParserEnv;

-import org.yangcentral.yangkit.parser.YangParserException;

-import org.yangcentral.yangkit.parser.YangYinParser;

 import org.yangcentral.yangkit.utils.file.FileUtil;

-import org.yangcentral.yangkit.utils.url.URLUtil;

 import org.yangcentral.yangkit.writter.YangFormatter;

 import org.yangcentral.yangkit.writter.YangWriter;

 

@@ -69,34 +45,24 @@ import org.yangcentral.yangkit.writter.YangWriter;
 public class YangCompiler {

 

     private Settings settings;

-    private File yang;

 

     private final Map<String, PluginInfo> pluginInfos = new ConcurrentHashMap<String, PluginInfo>();

 

-    private Builder builder;

+    private BuildOption buildOption;

+

+    private boolean install;

+

+    private static final Logger logger = LoggerFactory.getLogger(YangCompiler.class);

 

-    /**

-     * constructor.

-     */

     public YangCompiler() {

     }

 

-    /**

-     * get the builder.

-     *

-     * @return builder class

-     */

-    public Builder getBuilder() {

-        return builder;

+    public BuildOption getBuildOption() {

+        return buildOption;

     }

 

-    /**

-     * set builder.

-     *

-     * @param builder builder

-     */

-    public void setBuilder(Builder builder) {

-        this.builder = builder;

+    public void setBuildOption(BuildOption buildOption) {

+        this.buildOption = buildOption;

     }

 

     /**

@@ -145,445 +111,103 @@ public class YangCompiler {
         this.settings = settings;

     }

 

-    /**

-     * get yang directory file handler.

-     *

-     * @return yang directory file handler.

-     */

-    public File getYang() {

-        return yang;

+    public boolean isInstall() {

+        return install;

     }

 

-    /**

-     * set yang directory file handler.

-     *

-     * @param yang file handler

-     */

-    public void setYang(File yang) {

-        this.yang = yang;

+    public void setInstall(boolean install) {

+        this.install = install;

     }

 

     /**

-     * get all dependencies of a specified module.

-     *

-     * @param module module

-     * @return dependencies

+     * build schema context from build option.

+     * @return yang schema context

      */

-    private List<ModuleId> getDependencies(Module module) {

-        List<ModuleId> dependencies = new ArrayList<>();

-        if (module == null) {

-            return dependencies;

-        }

-        List<YangStatement> importStatements = module.getSubStatement(YangBuiltinKeyword.IMPORT.getQName());

-        for (YangStatement importStatement : importStatements) {

-            String moduleName = importStatement.getArgStr();

-            String revision = null;

-            List<YangStatement> revisions = importStatement.getSubStatement(YangBuiltinKeyword.REVISIONDATE.getQName());

-            if (revisions.isEmpty()) {

-                revision = "";

-            } else {

-                revision = revisions.get(0).getArgStr();

-            }

-            ModuleId moduleId = new ModuleId(moduleName, revision);

-            dependencies.add(moduleId);

-        }

-        List<YangStatement> includeStatements = module.getSubStatement(YangBuiltinKeyword.INCLUDE.getQName());

-        for (YangStatement includeStatement : includeStatements) {

-            String moduleName = includeStatement.getArgStr();

-            String revision = null;

-            List<YangStatement> revisions =

-                    includeStatement.getSubStatement(YangBuiltinKeyword.REVISIONDATE.getQName());

-            if (revisions.isEmpty()) {

-                revision = "";

-            } else {

-                revision = revisions.get(0).getArgStr();

-            }

-            ModuleId moduleId = new ModuleId(moduleName, revision);

-            dependencies.add(moduleId);

-        }

-        if (module instanceof SubModule) {

-            List<YangStatement> belongsToStatements = module.getSubStatement(YangBuiltinKeyword.BELONGSTO.getQName());

-            String moduleName = belongsToStatements.get(0).getArgStr();

-            ModuleId moduleId = new ModuleId(moduleName, "");

-            dependencies.add(moduleId);

-        }

-        return dependencies;

-    }

-

-    private String urlInvoke(String url) throws IOException {

-        URL catalogUrl = URI.create(url).toURL();

-        Proxy proxy = null;

-        Authenticator authenticator = null;

-        if (settings.getProxy() != null) {

-            String protocol = catalogUrl.getProtocol();

-            Proxy.Type proxyType = null;

-            if (protocol.equalsIgnoreCase("http") || protocol.equalsIgnoreCase("https")) {

-                proxyType = Proxy.Type.HTTP;

-            } else {

-                proxyType = Proxy.Type.SOCKS;

-            }

-            proxy = new Proxy(proxyType,

-                    new InetSocketAddress(settings.getProxy().getHostName(), settings.getProxy().getPort()));

-            if (settings.getProxy().getAuthentication() != null) {

-                authenticator = new Authenticator() {

-                    @Override

-                    protected PasswordAuthentication getPasswordAuthentication() {

-                        return new PasswordAuthentication(settings.getProxy().getAuthentication().getName(),

-                                settings.getProxy().getAuthentication().getPassword().toCharArray()

-                        );

-                    }

-                };

-                Authenticator.setDefault(authenticator);

+    public YangSchemaContext buildSchemaContext() {

+        YangSchemaContext schemaContext = null;

+        try {

+            List<Source> sources = buildOption.getSources();

+            for (Source source : sources) {

+                schemaContext = source.buildSource(settings, schemaContext, true);

             }

 

+            return schemaContext;

+        } catch (YangCompilerException e) {

+            throw new RuntimeException(e);

         }

-        return URLUtil.URLGet(catalogUrl, proxy, authenticator, settings.getToken());

     }

 

-    private File getFromLocal(ModuleId moduleId) {

-        File localRepository = new File(settings.getLocalRepository());

-        if (!localRepository.exists()) {

-            localRepository.mkdirs();

-        }

-        String prefix =

-                moduleId.getModuleName() + (moduleId.getRevision().equals("") ? "" : "@" + moduleId.getRevision());

-        String suffix = ".yang";

-        FilenameFilter filenameFilter = new FilenameFilter() {

-            @Override

-            public boolean accept(File dir, String name) {

-                if (dir != localRepository) {

-                    return false;

-                }

-                if (name.startsWith(prefix) && name.endsWith(suffix)) {

-                    String moduleDesc = name.substring(0, name.indexOf(suffix));

-                    String[] moduleInfo = moduleDesc.split("@");

-                    String moduleName = moduleInfo[0];

-                    String revision = moduleInfo[1];

-                    if (!moduleName.equals(moduleId.getModuleName())) {

-                        return false;

-                    }

-                    if (moduleId.getRevision() != null && moduleId.getRevision().length() > 0) {

-                        if (!revision.equals(moduleId.getRevision())) {

-                            return false;

-                        }

-                    }

-                    return true;

-                }

-                return false;

-            }

-        };

-        System.out.print("[INFO]finding module:" + moduleId.getModuleName()

-                + (moduleId.getRevision().isEmpty() ? "" : moduleId.getRevision())

-                + " from " + localRepository.getAbsolutePath()

-                + " ...");

-        File[] matched = localRepository.listFiles(filenameFilter);

-        if (matched == null || matched.length == 0) {

-            System.out.println("not found.");

-            return null;

-        }

-        if (matched.length == 1) {

-            System.out.println("get " + matched[0].getName());

-            return matched[0];

-        }

-        File latest = null;

-        if (matched.length > 1) {

-            for (File file : matched) {

-                if (latest == null) {

-                    latest = file;

-                } else {

-                    if (file.getName().compareTo(latest.getName()) > 0) {

-                        latest = file;

-                    }

-                }

-            }

+    private void saveModule(String fileName, List<YangElement> elements) {

+        StringBuilder sb = new StringBuilder();

+        for (YangElement element : elements) {

+            String yangStr = YangWriter.toYangString(element, YangFormatter.getPrettyYangFormatter(), null);

+            sb.append(yangStr);

+            sb.append("\n");

         }

-        System.out.println("get " + latest.getName());

-        return latest;

-    }

-

-    private File getFromRemote(ModuleId moduleId) throws IOException {

-        ModuleInfo moduleInfo = null;

-        if (moduleId.getRevision() == null || moduleId.getRevision().equals("")) {

-            String url = settings.getRemoteRepository() + "search/name/" + moduleId.getModuleName();

-            System.out.print("[INFO]downloading module info:" + moduleId.getModuleName() + " from " + url + " ...");

-            YangCatalog yangCatalog = YangCatalog.parse(urlInvoke(url));

-            moduleInfo = yangCatalog.getLatestModule(moduleId.getModuleName());

-            System.out.println(moduleInfo == null ? " not found." : "revision=" + moduleInfo.getRevision());

-

-        } else {

-            String organization = moduleId.getModuleName().substring(0, moduleId.getModuleName().indexOf("-"));

-            if (organization.equals("junos")) {

-                organization = "juniper";

-            }

-            String url = settings.getRemoteRepository()

-                    + "search/modules/"

-                    + moduleId.getModuleName()

-                    + ","

-                    + moduleId.getRevision()

-                    + ","

-                    + organization;

-            System.out.print("[INFO]downloading module info:"

-                    + moduleId.getModuleName()

-                    + " from "

-                    + url

-                    + " ...");

-            moduleInfo = ModuleInfo.parse(urlInvoke(url));

-            System.out.println(moduleInfo == null ? " not found." : "finished");

 

-        }

-        if (moduleInfo == null) {

-            return null;

-        }

-        System.out.print("[INFO]downloading content of module:" + moduleInfo.getName() + "@" + moduleInfo.getRevision()

-                + " from " + moduleInfo.getSchema().toString() + " ...");

-        String yangString = urlInvoke(moduleInfo.getSchema().toString());

-        System.out.println("finished.");

-        File localRepositoryFile = new File(settings.getLocalRepository());

-        if (!localRepositoryFile.exists()) {

-            localRepositoryFile.mkdirs();

-        }

-        String yangfileName = moduleInfo.getName() + "@" + moduleInfo.getRevision() + ".yang";

-        File localYangFile = new File(localRepositoryFile, yangfileName);

-        FileUtil.writeUtf8File(yangString, localYangFile);

-        System.out.println("[INFO]save module:"

-                + moduleInfo.getName()

-                + "@"

-                + moduleInfo.getRevision()

-                + " to "

-                + localYangFile.getAbsolutePath());

-        return localYangFile;

+        fileName = settings.getLocalRepository() + File.separator + fileName;

+        FileUtil.writeUtf8File(fileName, sb.toString());

     }

 

-    private File getFromSettings(ModuleId moduleId) throws IOException {

-        ModuleInfo moduleInfo = null;

-        if (moduleId.getRevision() == null || moduleId.getRevision().equals("")) {

-            moduleInfo = settings.getLatestModuleInfo(moduleId.getModuleName());

-            System.out.print("[INFO]getting module info:"

-                    + moduleId.getModuleName()

-                    + " from settings");

-            System.out.println(moduleInfo == null ? " not found." : "revision="

-                    + moduleInfo.getRevision());

-

-        } else {

-            System.out.print("[INFO]getting module info:"

-                    + moduleId.getModuleName()

-                    + " from settings.");

-            moduleInfo = settings.getModuleInfo(moduleId.getModuleName(), moduleId.getRevision());

-            System.out.println(moduleInfo == null ? " not found." : "finished");

-

-        }

-        if (moduleInfo == null) {

-            return null;

-        }

-        System.out.print("[INFO]downloading content of module:"

-                + moduleInfo.getName()

-                + "@"

-                + moduleInfo.getRevision()

-                + " from "

-                + moduleInfo.getSchema().toString()

-                + " ...");

-        String yangString = urlInvoke(moduleInfo.getSchema().toString());

-        System.out.println("finished.");

-        File localRepositoryFile = new File(settings.getLocalRepository());

-        if (!localRepositoryFile.exists()) {

-            localRepositoryFile.mkdirs();

-        }

-        String yangfileName = moduleInfo.getName()

-                + "@"

-                + moduleInfo.getRevision()

-                + ".yang";

-        File localYangFile = new File(localRepositoryFile, yangfileName);

-        FileUtil.writeUtf8File(yangString, localYangFile);

-        System.out.println("[INFO]save module:"

-                + moduleInfo.getName()

-                + "@"

-                + moduleInfo.getRevision()

-                + " to "

-                + localYangFile.getAbsolutePath());

-        return localYangFile;

-    }

-

-    private void buildDependencies(YangSchemaContext schemaContext, List<ModuleId> dependencies)

-            throws IOException, YangParserException, YangCompilerException {

-        for (ModuleId moduleId : dependencies) {

-            if (schemaContext.getModule(moduleId).isPresent()) {

-                continue;

-            }

-            //firstly,get yang file from local repository

-            File file = getFromLocal(moduleId);

-            if (file == null) {

-                //secondly,if not found,get yang file from settings

-                file = getFromSettings(moduleId);

-                if (file == null) {

-                    //thirdly, if not found, get yang file from remote repository

-                    file = getFromRemote(moduleId);

-                }

+    private void installModules(List<Module> modules) {

+        for (Module module : modules) {

+            String moduleName = module.getArgStr();

+            String revision = "";

+            if (module.getCurRevisionDate().isPresent()) {

+                revision = module.getCurRevisionDate().get();

             }

-            if (file == null) {

-                throw new YangCompilerException("can not find the yang module named:"

-                        + moduleId.getModuleName(),

-                        moduleId);

+            ModuleInfo moduleInfo = new ModuleInfo(moduleName, revision, null);

+            ModuleInfo targetModuleInfo = YangCompilerUtil.getSchemaFromLocal(moduleInfo, settings);

+            if (targetModuleInfo == null) {

+                //if not found, save this module to local repository

+                List<YangElement> elements = module.getContext().getSchemaContext().getParseResult()

+                        .get(module.getElementPosition().getSource());

+                saveModule(moduleInfo.getModuleInfo() + ".yang", elements);

+                logger.info("install " + moduleInfo.getModuleInfo() + ".yang" + " to " + settings.getLocalRepository());

             }

 

-            YangParserEnv env = new YangParserEnv();

-            env.setCurPos(0);

-            env.setYangStr(FileUtil.readFile2String(file));

-            env.setFilename(file.getAbsolutePath());

-            YangParser yangParser = new YangParser();

-            List<YangElement> yangElements = yangParser.parseYang(env.getYangStr(), env);

-            schemaContext.getParseResult().put(env.getFilename(), yangElements);

-            Module module = null;

-            for (YangElement yangElement : yangElements) {

-                if (yangElement instanceof Module) {

-                    module = (Module) yangElement;

-                    schemaContext.addImportOnlyModule(module);

-                    break;

-                }

-            }

-            if (module != null) {

-                List<ModuleId> subDependencies = getDependencies(module);

-                if (!subDependencies.isEmpty()) {

-                    buildDependencies(schemaContext, subDependencies);

-                }

-

-            }

-        }

-    }

-

-    /**

-     * build yang schema context.

-     *

-     * @return yang schema context

-     */

-    public YangSchemaContext buildSchemaContext() {

-        if (!yang.exists()) {

-            return null;

-        }

-        try {

-            YangSchemaContext schemaContext = YangYinParser.parse(yang);

-            for (Module module : schemaContext.getModules()) {

-                List<ModuleId> dependencies = getDependencies(module);

-                buildDependencies(schemaContext, dependencies);

-            }

-            return schemaContext;

-        } catch (IOException e) {

-            throw new RuntimeException(e);

-        } catch (YangParserException e) {

-            throw new RuntimeException(e);

-        } catch (DocumentException e) {

-            throw new RuntimeException(e);

-        } catch (YangCompilerException e) {

-            throw new RuntimeException(e);

         }

     }

 

     /**

-     * compile yang files.

-     *

-     * @param yangdir      yang directory

-     * @param settingsfile the path of settings.json

-     * @param install      whether install to local repository

-     * @throws IOException        io exception

-     * @throws URISyntaxException uri syntax exception

+     * compile yang modules and invoke plugins.

      */

-    public void compile(@Nullable String yangdir, @Nullable String settingsfile, boolean install)

-            throws IOException, URISyntaxException {

-        String defaultSettingsfile =

-                System.getProperty("user.home")

-                        + File.separator

-                        + ".yang"

-                        + File.separator

-                        + "settings.json";

-        Settings settings = null;

-        if (settingsfile != null) {

-            settings = Settings.parse(FileUtil.readFile2String(settingsfile));

-        } else {

-            File defaultSettingsFile = new File(defaultSettingsfile);

-            if (defaultSettingsFile.exists()) {

-                settings = Settings.parse(FileUtil.readFile2String(defaultSettingsfile));

-            } else {

-                File programDir = new File(this.getClass().getProtectionDomain().getCodeSource().getLocation()

-                        .toURI());

-                File programSettings = new File(programDir.getParentFile(), "settings.json");

-                if (programSettings.exists()) {

-                    settings = Settings.parse(FileUtil.readFile2String(programSettings));

-                } else {

-                    settings = new Settings();

-                }

-

-            }

-        }

-

-        setSettings(settings);

-        File builderFile = new File("build.json");

-        if (builderFile.exists()) {

-            Builder builder = prepareBuilder(FileUtil.readFile2String(builderFile));

-            setBuilder(builder);

-            if (yangdir == null) {

-                yangdir = builder.getYangDir();

-            }

-        }

-        if (yangdir == null) {

-            yangdir = "yang";

-            //System.out.println("no yang directory!");

-            //System.out.println("Usage: yang-compiler yang={yang directory} [settings={settings.json}] [install]");

-            //return;

-        }

-        File yangDirFile = new File(yangdir);

-        if (!yangDirFile.exists()) {

-            System.out.println("yang directory:"

-                    + yangdir

-                    + " is not exist!");

+    public void compile() {

+        if (buildOption == null) {

+            logger.warn("build.json is not found.");

             return;

         }

-        setYang(new File(yangdir));

-        Properties compilerProps = new Properties();

-        compilerProps.setProperty("yang", yangdir);

-        if (settings.getLocalRepository() != null) {

-            compilerProps.setProperty("local-repository", settings.getLocalRepository());

-        }

-

-        if (settings.getRemoteRepository() != null) {

-            compilerProps.setProperty("remote-repository", settings.getRemoteRepository().toString());

-        }

-

-        preparePlugins(this);

-

+        logger.info("build yang schema context.");

         YangSchemaContext schemaContext = buildSchemaContext();

         ValidatorResult validatorResult = schemaContext.validate();

         if (!validatorResult.isOk()) {

+            logger.error("there are some errors when validating yang schema context.");

             System.out.println(validatorResult);

             return;

         }

-        if (getBuilder() != null) {

-            for (PluginBuilder pluginBuilder : getBuilder().getPlugins()) {

-                PluginInfo pluginInfo = getPluginInfo(pluginBuilder.getName());

-                if (null == pluginInfo) {

-                    System.out.println("can not find a plugin named:"

-                            + pluginBuilder.getName());

-                    continue;

-                }

-                YangCompilerPlugin plugin = pluginInfo.getPlugin();

-                try {

-                    List<YangCompilerPluginParameter> parameters = new ArrayList<>();

-                    if (!pluginBuilder.getParameters().isEmpty()) {

-                        for (ParameterBuilder parameterBuilder : pluginBuilder.getParameters()) {

-                            YangCompilerPluginParameter parameter = plugin.getParameter(compilerProps,

-                                    parameterBuilder.getName(), parameterBuilder.getValue());

-                            if (parameter != null) {

-                                parameters.add(parameter);

-                            }

+        for (Plugin pluginBuilder : getBuildOption().getPlugins()) {

+            PluginInfo pluginInfo = getPluginInfo(pluginBuilder.getName());

+            if (null == pluginInfo) {

+                logger.warn("can not find a plugin named:" + pluginBuilder.getName());

+                continue;

+            }

+            YangCompilerPlugin plugin = pluginInfo.getPlugin();

+            try {

+                List<YangCompilerPluginParameter> parameters = new ArrayList<>();

+                if (!pluginBuilder.getParameters().isEmpty()) {

+                    for (Parameter parameterBuilder : pluginBuilder.getParameters()) {

+                        YangCompilerPluginParameter parameter = plugin.getParameter(

+                                parameterBuilder.getName(), parameterBuilder.getValue());

+                        if (parameter != null) {

+                            parameters.add(parameter);

                         }

                     }

-                    System.out.println("[INFO]call plugin:"

-                            + pluginInfo.getPluginName()

-                            + " ...");

-                    plugin.run(schemaContext, this, parameters);

-                    System.out.println("ok.");

-                } catch (YangCompilerException e) {

-                    System.out.println("[ERROR]"

-                            + e.getMessage());

                 }

+                logger.info("call plugin:" + pluginInfo.getPluginName() + " ...");

+                plugin.run(schemaContext, this, parameters);

+                logger.info("ok.");

+            } catch (YangCompilerException e) {

+                logger.error(e.getMessage());

             }

         }

         ValidatorResultBuilder validatorResultBuilder = new ValidatorResultBuilder();

@@ -598,78 +222,10 @@ public class YangCompiler {
         }

         validatorResult = validatorResultBuilder.build();

         if (install && validatorResult.isOk()) {

-            for (Module module : schemaContext.getModules()) {

-                List<YangElement> elements =

-                        schemaContext.getParseResult().get(module.getElementPosition().getSource());

-                StringBuilder sb = new StringBuilder();

-                for (YangElement element : elements) {

-                    String yangStr = YangWriter.toYangString(element, YangFormatter.getPrettyYangFormatter(), null);

-                    sb.append(yangStr);

-                    sb.append("\n");

-                }

-                String moduleDesc = module.getArgStr()

-                        + (module.getCurRevisionDate().isPresent() ? "@" + module.getCurRevisionDate().get() : "");

-                String fileName = settings.getLocalRepository()

-                        + File.separator + moduleDesc;

-                FileUtil.writeUtf8File(fileName, sb.toString());

-                System.out.println("[INFO]install "

-                        + moduleDesc

-                        + " to "

-                        + settings.getLocalRepository());

-

-            }

+            installModules(schemaContext.getModules());

         }

-        System.out.println(validatorResult);

+        logger.info(validatorResult.toString());

     }

 

-    private static void preparePlugins(YangCompiler yangCompiler) throws IOException, URISyntaxException {

-        InputStream inputStream = yangCompiler.getClass().getResourceAsStream("/plugins.json");

-        Scanner scanner = new Scanner(inputStream).useDelimiter("\\A");

-        String result = scanner.hasNext() ? scanner.next() : "";

-        if (!result.isEmpty()) {

-            List<PluginInfo> pluginInfos = parsePlugins(null, result);

-            for (PluginInfo pluginInfo : pluginInfos) {

-                yangCompiler.addPluginInfo(pluginInfo);

-            }

-        }

-        File programDir = new File(yangCompiler.getClass().getProtectionDomain().getCodeSource().getLocation()

-                .toURI());

-        File pluginsDir = new File(programDir.getParentFile(), "plugins");

-        if (!pluginsDir.exists()) {

-            System.out.println("[WARNING]plugins dir:"

-                    + pluginsDir.getAbsolutePath()

-                    + " is not exists");

-            return;

-        }

-        File pluginsFile = new File(pluginsDir, "plugins.json");

-        if (pluginsFile.exists()) {

-            System.out.println("[INFO]reading the information of plugins from:"

-                    + pluginsFile.getAbsolutePath());

-            List<PluginInfo> pluginInfos = parsePlugins(pluginsFile, FileUtil.readFile2String(pluginsFile));

-            for (PluginInfo pluginInfo : pluginInfos) {

-                yangCompiler.addPluginInfo(pluginInfo);

-            }

-        }

 

-

-    }

-

-    private static List<PluginInfo> parsePlugins(File pluginsFile, String str) {

-        List<PluginInfo> pluginInfos = new ArrayList<>();

-        JsonElement pluginsElement = JsonParser.parseString(str);

-        JsonObject jsonObject = pluginsElement.getAsJsonObject();

-        JsonObject pluginsObject = jsonObject.get("plugins").getAsJsonObject();

-        JsonArray pluginList = pluginsObject.getAsJsonArray("plugin");

-        for (int i = 0; i < pluginList.size(); i++) {

-            JsonElement pluginElement = pluginList.get(i);

-            PluginInfo pluginInfo = PluginInfo.parse(pluginsFile, pluginElement);

-            pluginInfos.add(pluginInfo);

-        }

-        return pluginInfos;

-    }

-

-    private static Builder prepareBuilder(String str) {

-        JsonElement jsonElement = JsonParser.parseString(str);

-        return Builder.parse(jsonElement);

-    }

 }

diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/app/YangCompilerRunner.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/app/YangCompilerRunner.java
index 650e444..217ffad 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/app/YangCompilerRunner.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/app/YangCompilerRunner.java
@@ -16,31 +16,86 @@ limitations under the License.
 

 package org.onap.modeling.yangkit.compiler.app;

 

+import com.google.gson.JsonArray;

+import com.google.gson.JsonElement;

+import com.google.gson.JsonObject;

+import com.google.gson.JsonParser;

+

+import java.io.File;

 import java.io.IOException;

+import java.io.InputStream;

 import java.net.URISyntaxException;

-import org.onap.modeling.yangkit.compiler.YangCompiler;

+import java.util.ArrayList;

+import java.util.List;

+import java.util.Scanner;

 

+import org.onap.modeling.yangkit.compiler.BuildOption;

+import org.onap.modeling.yangkit.compiler.PluginInfo;

+import org.onap.modeling.yangkit.compiler.Settings;

+import org.onap.modeling.yangkit.compiler.YangCompiler;

+import org.yangcentral.yangkit.utils.file.FileUtil;

 

 public class YangCompilerRunner {

+    private static List<PluginInfo> parsePlugins(File pluginsFile, String str) {

+        List<PluginInfo> pluginInfos = new ArrayList<>();

+        JsonElement pluginsElement = JsonParser.parseString(str);

+        JsonObject jsonObject = pluginsElement.getAsJsonObject();

+        JsonObject pluginsObject = jsonObject.get("plugins").getAsJsonObject();

+        JsonArray pluginList = pluginsObject.getAsJsonArray("plugin");

+        for (int i = 0; i < pluginList.size(); i++) {

+            JsonElement pluginElement = pluginList.get(i);

+            PluginInfo pluginInfo = PluginInfo.parse(pluginsFile, pluginElement);

+            pluginInfos.add(pluginInfo);

+        }

+        return pluginInfos;

+    }

+

+    private static void preparePlugins(YangCompiler yangCompiler) throws IOException, URISyntaxException {

+        InputStream inputStream = yangCompiler.getClass().getResourceAsStream("/plugins.json");

+        Scanner scanner = new Scanner(inputStream).useDelimiter("\\A");

+        String result = scanner.hasNext() ? scanner.next() : "";

+        if (!result.isEmpty()) {

+            List<PluginInfo> pluginInfos = parsePlugins(null, result);

+            for (PluginInfo pluginInfo : pluginInfos) {

+                yangCompiler.addPluginInfo(pluginInfo);

+            }

+        }

+        File programDir = new File(yangCompiler.getClass().getProtectionDomain().getCodeSource().getLocation()

+                .toURI());

+        File pluginsDir = new File(programDir.getParentFile(), "plugins");

+        if (!pluginsDir.exists()) {

+            System.out.println("[WARNING]plugins dir:" + pluginsDir.getAbsolutePath() + " is not exists");

+            return;

+        }

+        File pluginsFile = new File(pluginsDir, "plugins.json");

+        if (pluginsFile.exists()) {

+            System.out.println("[INFO]reading the information of plugins from:" + pluginsFile.getAbsolutePath());

+            List<PluginInfo> pluginInfos = parsePlugins(pluginsFile, FileUtil.readFile2String(pluginsFile));

+            for (PluginInfo pluginInfo : pluginInfos) {

+                yangCompiler.addPluginInfo(pluginInfo);

+            }

+        }

+

+

+    }

+

     /**

-     * the main method of yang compiler runner.

+     * main function of yang compiler.

+     *

      * @param args arguments

-     * @throws IOException io exception

-     * @throws URISyntaxException uri syntax exception

+     * @throws IOException        io exception

+     * @throws URISyntaxException URI syntax exception

      */

     public static void main(String[] args) throws IOException, URISyntaxException {

-        String yangdir = null;

-        String settingsfile = null;

+        String option = null;

         boolean install = false;

         for (String arg : args) {

             String[] paras = arg.split("=");

             if (paras.length == 2) {

                 String para = paras[0];

                 String value = paras[1];

-                if (para.equals("yang")) {

-                    yangdir = value;

-                } else if (para.equals("settings")) {

-                    settingsfile = value;

+                if (para.equals("option")) {

+                    option = value;

                 }

             } else {

                 if (arg.equals("install")) {

@@ -48,7 +103,46 @@ public class YangCompilerRunner {
                 }

             }

         }

+        if (option == null) {

+            option = "build.json";

+        }

+        // get build option

+        File optionFile = new File(option);

+        if (!optionFile.exists()) {

+            System.out.println("The option file:" + option + " is not found.");

+            return;

+        }

+        JsonElement jsonElement = JsonParser.parseString(FileUtil.readFile2String(optionFile));

+        BuildOption buildOption = BuildOption.parse(jsonElement);

+        // get settings

+        String settingsPath = buildOption.getSettings();

+        if (settingsPath == null) {

+            //if no settings is specified by user, get the settings.json from program directory

+            File programDir = new File(YangCompilerRunner.class.getProtectionDomain().getCodeSource().getLocation()

+                    .toURI());

+            File programSettings = new File(programDir.getParentFile(), "settings.json");

+            if (programSettings.exists()) {

+                settingsPath = programSettings.getAbsolutePath();

+            }

+        }

+        if (settingsPath == null) {

+            //if settings.json is not found in program directory, try to find it from user.home

+            settingsPath = System.getProperty("user.home")

+                    + File.separator

+                    + ".yang"

+                    + File.separator

+                    + "settings.json";

+        }

+        Settings settings = new Settings();

+        File settingsfile = new File(settingsPath);

+        if (settingsfile.exists()) {

+            settings = Settings.parse(FileUtil.readFile2String(settingsfile));

+        }

         YangCompiler compiler = new YangCompiler();

-        compiler.compile(yangdir, settingsfile, install);

+        compiler.setBuildOption(buildOption);

+        compiler.setSettings(settings);

+        compiler.setInstall(install);

+        preparePlugins(compiler);

+        compiler.compile();

     }

 }

diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/YangCompilerPlugin.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/YangCompilerPlugin.java
index a30f9fc..c4d2366 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/YangCompilerPlugin.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/YangCompilerPlugin.java
@@ -1,74 +1,65 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin;

-

-import java.util.Iterator;

-import java.util.List;

-import java.util.Map;

-import java.util.Properties;

-import java.util.regex.Matcher;

-

-import org.onap.modeling.yangkit.compiler.YangCompiler;

-import org.onap.modeling.yangkit.compiler.YangCompilerException;

-import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;

-

-

-public interface YangCompilerPlugin {

-    /**

-     * default implementation of get parameter method.

-     * @param compilerProps the properties of yang compiler.

-     * @param name the name of parameter

-     * @param value the value of parameter

-     * @return yang compiler plugin parameter

-     * @throws YangCompilerException if error occurs, the exception will be thrown.

-     */

-    default YangCompilerPluginParameter getParameter(Properties compilerProps, String name, String value)

-            throws YangCompilerException {

-        YangCompilerPluginParameter yangCompilerPluginParameter = new YangCompilerPluginParameter() {

-            @Override

-            public String getName() {

-                return name;

-            }

-

-            @Override

-            public Object getValue() {

-                Iterator<Map.Entry<Object, Object>> it = compilerProps.entrySet().iterator();

-                String formatStr = value;

-                while (it.hasNext()) {

-                    Map.Entry<Object, Object> entry = it.next();

-                    formatStr = formatStr.replaceAll("\\{" + entry.getKey() + "\\}",

-                            Matcher.quoteReplacement((String) entry.getValue()));

-                }

-                return formatStr;

-

-            }

-

-        };

-        return yangCompilerPluginParameter;

-    }

-

-    /**

-     * the definition of run method.

-     * @param schemaContext yang schema context

-     * @param yangCompiler yang compiler instance

-     * @param parameters parameters

-     * @throws YangCompilerException if error occurs, the exception will be thrown.

-     */

-    void run(YangSchemaContext schemaContext, YangCompiler yangCompiler, List<YangCompilerPluginParameter> parameters)

-            throws YangCompilerException;

-

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin;
+
+import com.google.gson.JsonElement;
+
+import java.util.List;
+
+import org.onap.modeling.yangkit.compiler.YangCompiler;
+import org.onap.modeling.yangkit.compiler.YangCompilerException;
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+
+
+public interface YangCompilerPlugin {
+    /**
+     * get parameter from build option.
+     * @param name parameter name
+     * @param value parameter value
+     * @return return yang compiler plugin parameter
+     * @throws YangCompilerException yang compiler exception
+     */
+    default YangCompilerPluginParameter getParameter(String name, JsonElement value)
+            throws YangCompilerException {
+        YangCompilerPluginParameter yangCompilerPluginParameter = new YangCompilerPluginParameter() {
+            @Override
+            public String getName() {
+                return name;
+            }
+
+            @Override
+            public Object getValue()  {
+                String formatStr = value.getAsString();
+                return formatStr;
+
+            }
+
+        };
+        return yangCompilerPluginParameter;
+    }
+
+    /**
+     * the definition of run method.
+     * @param schemaContext yang schema context
+     * @param yangCompiler yang compiler instance
+     * @param parameters parameters
+     * @throws YangCompilerException if error occurs, the exception will be thrown.
+     */
+    void run(YangSchemaContext schemaContext, YangCompiler yangCompiler, List<YangCompilerPluginParameter> parameters)
+            throws YangCompilerException;
+
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/YangCompilerPluginParameter.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/YangCompilerPluginParameter.java
index f3cb7aa..d76c9fa 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/YangCompilerPluginParameter.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/YangCompilerPluginParameter.java
@@ -1,35 +1,35 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin;

-

-import org.onap.modeling.yangkit.compiler.YangCompilerException;

-

-

-public interface YangCompilerPluginParameter {

-    /**

-     * get parameter name.

-     * @return name

-     */

-    String getName();

-

-    /**

-     * get parameter value.

-     * @return value

-     * @throws YangCompilerException yang compiler exception

-     */

-    Object getValue() throws YangCompilerException;

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin;
+
+import org.onap.modeling.yangkit.compiler.YangCompilerException;
+
+
+public interface YangCompilerPluginParameter {
+    /**
+     * get parameter name.
+     * @return name
+     */
+    String getName();
+
+    /**
+     * get parameter value.
+     * @return value
+     * @throws YangCompilerException yang compiler exception
+     */
+    Object getValue() throws YangCompilerException;
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/stat/Tag.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/stat/Tag.java
new file mode 100644
index 0000000..59a7996
--- /dev/null
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/stat/Tag.java
@@ -0,0 +1,45 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.stat;
+
+
+public class Tag {
+    private String name;
+    private String field;
+    private String value;
+
+    public Tag(String name, String field) {
+        this.name = name;
+        this.field = field;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getField() {
+        return field;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/stat/YangNodeDescription.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/stat/YangNodeDescription.java
index 2a903ca..a9c24bd 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/stat/YangNodeDescription.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/stat/YangNodeDescription.java
@@ -1,96 +1,130 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.stat;

-

-

-public class YangNodeDescription {

-    private String path;

-    private String description;

-    private String config;

-    private String schemaType;

-    private String nodeType;

-    private String module;

-    private boolean isActive;

-    private boolean isDeviated;

-

-    public YangNodeDescription() {

-    }

-

-    public String getPath() {

-        return path;

-    }

-

-    public void setPath(String path) {

-        this.path = path;

-    }

-

-    public String getDescription() {

-        return description;

-    }

-

-    public void setDescription(String description) {

-        this.description = description;

-    }

-

-    public String getConfig() {

-        return config;

-    }

-

-    public void setConfig(String config) {

-        this.config = config;

-    }

-

-    public String getSchemaType() {

-        return schemaType;

-    }

-

-    public void setSchemaType(String schemaType) {

-        this.schemaType = schemaType;

-    }

-

-    public String getNodeType() {

-        return nodeType;

-    }

-

-    public void setNodeType(String nodeType) {

-        this.nodeType = nodeType;

-    }

-

-    public String getModule() {

-        return module;

-    }

-

-    public void setModule(String module) {

-        this.module = module;

-    }

-

-    public boolean isActive() {

-        return isActive;

-    }

-

-    public void setActive(boolean active) {

-        isActive = active;

-    }

-

-    public boolean isDeviated() {

-        return isDeviated;

-    }

-

-    public void setDeviated(boolean deviated) {

-        isDeviated = deviated;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.stat;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class YangNodeDescription {
+    private String path;
+    private String description;
+    private String config;
+    private String schemaType;
+    private String nodeType;
+    private String module;
+    private boolean isActive;
+    private boolean isDeviated;
+
+    private List<Tag> tags = new ArrayList<>();
+
+    public YangNodeDescription() {
+    }
+
+    public String getPath() {
+        return path;
+    }
+
+    public void setPath(String path) {
+        this.path = path;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public String getConfig() {
+        return config;
+    }
+
+    public void setConfig(String config) {
+        this.config = config;
+    }
+
+    public String getSchemaType() {
+        return schemaType;
+    }
+
+    public void setSchemaType(String schemaType) {
+        this.schemaType = schemaType;
+    }
+
+    public String getNodeType() {
+        return nodeType;
+    }
+
+    public void setNodeType(String nodeType) {
+        this.nodeType = nodeType;
+    }
+
+    public String getModule() {
+        return module;
+    }
+
+    public void setModule(String module) {
+        this.module = module;
+    }
+
+    public boolean isActive() {
+        return isActive;
+    }
+
+    public void setActive(boolean active) {
+        isActive = active;
+    }
+
+    public boolean isDeviated() {
+        return isDeviated;
+    }
+
+    public void setDeviated(boolean deviated) {
+        isDeviated = deviated;
+    }
+
+    public List<Tag> getTags() {
+        return tags;
+    }
+
+    public void setTags(List<Tag> tags) {
+        this.tags = tags;
+    }
+
+    /**
+     * add a tag.
+     * @param tag customized tag
+     */
+    public void addTag(Tag tag) {
+        tags.add(tag);
+    }
+
+    /**
+     * get tag information according to name.
+     * @param name tag name
+     * @return tag
+     */
+    public Tag getTag(String name) {
+        for (Tag tag : tags) {
+            if (tag.getName().equals(name)) {
+                return tag;
+            }
+        }
+        return null;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/stat/YangStatistics.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/stat/YangStatistics.java
index f5863cc..6e38a99 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/stat/YangStatistics.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/stat/YangStatistics.java
@@ -1,278 +1,408 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.stat;

-

-import java.io.FileOutputStream;

-import java.io.IOException;

-import java.util.ArrayList;

-import java.util.List;

-

-import org.apache.poi.ss.usermodel.BorderStyle;

-import org.apache.poi.ss.usermodel.CellStyle;

-import org.apache.poi.ss.usermodel.HorizontalAlignment;

-import org.apache.poi.xssf.streaming.SXSSFCell;

-import org.apache.poi.xssf.streaming.SXSSFRow;

-import org.apache.poi.xssf.streaming.SXSSFSheet;

-import org.apache.poi.xssf.streaming.SXSSFWorkbook;

-import org.onap.modeling.yangkit.compiler.YangCompiler;

-import org.onap.modeling.yangkit.compiler.YangCompilerException;

-import org.onap.modeling.yangkit.plugin.YangCompilerPlugin;

-import org.onap.modeling.yangkit.plugin.YangCompilerPluginParameter;

-import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;

-import org.yangcentral.yangkit.model.api.stmt.Module;

-import org.yangcentral.yangkit.model.api.stmt.SchemaNode;

-import org.yangcentral.yangkit.model.api.stmt.SchemaNodeContainer;

-import org.yangcentral.yangkit.model.api.stmt.SubModule;

-import org.yangcentral.yangkit.model.api.stmt.TypedDataNode;

-import org.yangcentral.yangkit.model.api.stmt.VirtualSchemaNode;

-

-

-public class YangStatistics implements YangCompilerPlugin {

-    /**

-     * get node description.

-     * @param schemaNode schema node

-     * @return node description

-     */

-    public YangNodeDescription getNodeDescription(SchemaNode schemaNode) {

-        if (schemaNode == null) {

-            return null;

-        }

-        if (schemaNode instanceof VirtualSchemaNode) {

-            return null;

-        }

-        if (schemaNode.getSchemaPath() == null) {

-            return null;

-        }

-        YangNodeDescription nodeDescription = new YangNodeDescription();

-        nodeDescription.setPath(schemaNode.getSchemaPath().toString());

-        nodeDescription.setDescription(

-                schemaNode.getDescription() == null ? "" : schemaNode.getDescription().getArgStr());

-        nodeDescription.setConfig(schemaNode.isConfig() ? "true" : "false");

-        nodeDescription.setSchemaType(schemaNode.getYangKeyword().getLocalName());

-        if (schemaNode instanceof TypedDataNode) {

-            TypedDataNode typedDataNode = (TypedDataNode) schemaNode;

-            nodeDescription.setNodeType(typedDataNode.getType().getArgStr());

-        }

-        nodeDescription.setModule(schemaNode.getContext().getCurModule().getArgStr());

-        nodeDescription.setActive(schemaNode.isActive());

-        nodeDescription.setDeviated(schemaNode.isDeviated());

-        return nodeDescription;

-    }

-

-    /**

-     * get node description for schema node container.

-     * @param schemaNodeContainer schema node container

-     * @return list of node description.

-     */

-    public List<YangNodeDescription> getNodeDescriptions(SchemaNodeContainer schemaNodeContainer) {

-        if (schemaNodeContainer == null) {

-            return new ArrayList<>();

-        }

-        List<YangNodeDescription> nodeDescriptions = new ArrayList<>();

-        if (schemaNodeContainer instanceof SchemaNode) {

-            SchemaNode schemaNode = (SchemaNode) schemaNodeContainer;

-            YangNodeDescription nodeDescription = getNodeDescription(schemaNode);

-            if (nodeDescription != null) {

-                nodeDescriptions.add(nodeDescription);

-            }

-        }

-

-        for (SchemaNode schemaNode : schemaNodeContainer.getSchemaNodeChildren()) {

-            if (schemaNode instanceof SchemaNodeContainer) {

-                nodeDescriptions.addAll(getNodeDescriptions((SchemaNodeContainer) schemaNode));

-            } else {

-                YangNodeDescription nodeDescription = getNodeDescription(schemaNode);

-                if (nodeDescription != null) {

-                    nodeDescriptions.add(nodeDescription);

-                }

-            }

-        }

-        return nodeDescriptions;

-    }

-

-    /**

-     * get yang statistics for yang schema context.

-     * @param schemaContext yang schema context.

-     * @return list of node description.

-     */

-    public List<YangNodeDescription> getYangStatistics(YangSchemaContext schemaContext) {

-        List<YangNodeDescription> nodeDescriptions = new ArrayList<>();

-        if (schemaContext == null) {

-            return nodeDescriptions;

-        }

-        for (Module module : schemaContext.getModules()) {

-            if (module instanceof SubModule) {

-                continue;

-            }

-            nodeDescriptions.addAll(getNodeDescriptions(module));

-        }

-        return nodeDescriptions;

-    }

-

-    /**

-     * serialize the yang statistics of schema context to xlsx format.

-     * @param schemaContext yang schema context.

-     * @return xlsx document

-     */

-    public SXSSFWorkbook serializeXlsx(YangSchemaContext schemaContext) {

-        SXSSFWorkbook workbook = new SXSSFWorkbook();

-        SXSSFSheet summary = workbook.createSheet("summary");

-        summary.setDisplayGridlines(true);

-        summary.setAutobreaks(true);

-        summary.setColumnWidth(0, 5000);

-        summary.setColumnWidth(1, 5000);

-        SXSSFRow sumFirstRow = summary.createRow(0);

-        SXSSFCell totalModules = sumFirstRow.createCell(0);

-        totalModules.setCellValue("Total modules:");

-        SXSSFCell totalModulesVal = sumFirstRow.createCell(1);

-        totalModulesVal.setCellValue(schemaContext.getModules().size());

-

-        SXSSFSheet detail = workbook.createSheet("detail");

-        detail.setDisplayGridlines(true);

-        detail.setAutobreaks(true);

-        detail.setColumnWidth(0, 20000);

-        detail.setColumnWidth(1, 5000);

-        detail.setColumnWidth(2, 20000);

-        detail.setColumnWidth(3, 5000);

-        detail.setColumnWidth(4, 5000);

-        detail.setColumnWidth(5, 5000);

-        detail.setColumnWidth(6, 5000);

-        detail.setColumnWidth(7, 5000);

-

-        CellStyle style = workbook.createCellStyle();

-        style.setBorderBottom(BorderStyle.THIN);

-        style.setBorderLeft(BorderStyle.THIN);

-        style.setBorderRight(BorderStyle.THIN);

-        style.setBorderTop(BorderStyle.THIN);

-

-        CellStyle desStyle = workbook.createCellStyle();

-        desStyle.cloneStyleFrom(style);

-        desStyle.setAlignment(HorizontalAlignment.JUSTIFY);

-

-        detail.setDefaultColumnStyle(0, style);

-        detail.setDefaultColumnStyle(1, desStyle);

-        detail.setDefaultColumnStyle(2, style);

-        detail.setDefaultColumnStyle(3, style);

-        detail.setDefaultColumnStyle(4, style);

-        detail.setDefaultColumnStyle(5, style);

-        detail.setDefaultColumnStyle(6, style);

-        detail.setDefaultColumnStyle(7, style);

-

-        //generate header

-        SXSSFRow firstRow = detail.createRow(0);

-        SXSSFCell yangpath = firstRow.createCell(0);

-        yangpath.setCellValue("Path");

-        yangpath.setCellStyle(style);

-        SXSSFCell active = firstRow.createCell(1);

-        active.setCellValue("Active");

-        active.setCellStyle(style);

-        SXSSFCell description = firstRow.createCell(2);

-        description.setCellValue("Description");

-        description.setCellStyle(style);

-        SXSSFCell config = firstRow.createCell(3);

-        config.setCellValue("Config");

-        config.setCellStyle(style);

-        SXSSFCell schema = firstRow.createCell(4);

-        schema.setCellValue("schema");

-        schema.setCellStyle(style);

-        SXSSFCell type = firstRow.createCell(5);

-        type.setCellValue("type");

-        type.setCellStyle(style);

-        SXSSFCell moduleHeader = firstRow.createCell(6);

-        moduleHeader.setCellValue("module");

-        moduleHeader.setCellStyle(style);

-        SXSSFCell deviated = firstRow.createCell(7);

-        deviated.setCellValue("deviated");

-        deviated.setCellStyle(style);

-

-

-        List<YangNodeDescription> totalPaths = getYangStatistics(schemaContext);

-

-

-        if (null != totalPaths) {

-            int pathSize = totalPaths.size();

-            SXSSFRow summarySecRow = summary.createRow(1);

-            SXSSFCell totalNodes = summarySecRow.createCell(0);

-            totalNodes.setCellValue("Total nodes:");

-            SXSSFCell totalNodesVal = summarySecRow.createCell(1);

-            totalNodesVal.setCellValue(pathSize);

-            for (int i = 0; i < pathSize; i++) {

-                YangNodeDescription path = totalPaths.get(i);

-                SXSSFRow row = detail.createRow(i + 1);

-                SXSSFCell pathCell = row.createCell(0);

-                pathCell.setCellValue(path.getPath());

-                pathCell.setCellStyle(style);

-                SXSSFCell activeCell = row.createCell(1);

-                activeCell.setCellValue(path.isActive());

-                activeCell.setCellStyle(style);

-                SXSSFCell descriptionCell = row.createCell(2);

-                String str = path.getDescription();

-                if (str.length() >= 32767) {

-                    str = str.substring(0, 32767);

-                }

-                descriptionCell.setCellValue(str);

-                descriptionCell.setCellStyle(desStyle);

-

-                SXSSFCell configCell = row.createCell(3);

-                configCell.setCellValue(path.getConfig());

-                configCell.setCellStyle(style);

-

-                SXSSFCell schemaCell = row.createCell(4);

-                schemaCell.setCellValue(path.getSchemaType());

-                schemaCell.setCellStyle(style);

-

-                SXSSFCell typeCell = row.createCell(5);

-                typeCell.setCellValue(path.getNodeType());

-                typeCell.setCellStyle(style);

-

-                SXSSFCell moduleCell = row.createCell(6);

-                moduleCell.setCellValue(path.getModule());

-                moduleCell.setCellStyle(style);

-                SXSSFCell deviateCell = row.createCell(7);

-                deviateCell.setCellValue(path.isDeviated());

-                deviateCell.setCellStyle(style);

-            }

-        }

-        return workbook;

-    }

-

-    /**

-     * a yang compiler plugin implementation (run method).

-     * @param schemaContext yang schema context

-     * @param yangCompiler yang compiler instance

-     * @param parameters parameters for plugin

-     * @throws YangCompilerException if error occurs, throw the exception

-     */

-    @Override

-    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,

-                    List<YangCompilerPluginParameter> parameters) throws YangCompilerException {

-

-        YangCompilerPluginParameter para = parameters.get(0);

-        if (!para.getName().equals("output")) {

-            throw new YangCompilerException("unknown parameter:" + para.getName());

-        }

-        String output = (String) para.getValue();

-        SXSSFWorkbook workbook = serializeXlsx(schemaContext);

-        try {

-            workbook.write(new FileOutputStream(output));

-            workbook.close();

-        } catch (IOException e) {

-            throw new RuntimeException(e);

-        }

-

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.stat;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.poi.ss.usermodel.BorderStyle;
+import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.HorizontalAlignment;
+import org.apache.poi.xssf.streaming.SXSSFCell;
+import org.apache.poi.xssf.streaming.SXSSFRow;
+import org.apache.poi.xssf.streaming.SXSSFSheet;
+import org.apache.poi.xssf.streaming.SXSSFWorkbook;
+
+import org.onap.modeling.yangkit.compiler.YangCompiler;
+import org.onap.modeling.yangkit.compiler.YangCompilerException;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPlugin;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPluginParameter;
+import org.yangcentral.yangkit.base.Yang;
+import org.yangcentral.yangkit.common.api.FName;
+import org.yangcentral.yangkit.common.api.QName;
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+import org.yangcentral.yangkit.model.api.stmt.Module;
+import org.yangcentral.yangkit.model.api.stmt.SchemaNode;
+import org.yangcentral.yangkit.model.api.stmt.SchemaNodeContainer;
+import org.yangcentral.yangkit.model.api.stmt.SubModule;
+import org.yangcentral.yangkit.model.api.stmt.TypedDataNode;
+import org.yangcentral.yangkit.model.api.stmt.VirtualSchemaNode;
+import org.yangcentral.yangkit.model.api.stmt.YangStatement;
+
+
+public class YangStatistics implements YangCompilerPlugin {
+    private List<Tag> tags = new ArrayList<>();
+    private String output;
+
+    /**
+     * get node description.
+     *
+     * @param schemaNode schema node
+     * @return node description
+     */
+    public YangNodeDescription getNodeDescription(SchemaNode schemaNode) {
+        if (schemaNode == null) {
+            return null;
+        }
+        if (schemaNode instanceof VirtualSchemaNode) {
+            return null;
+        }
+        if (schemaNode.getSchemaPath() == null) {
+            return null;
+        }
+        YangNodeDescription nodeDescription = new YangNodeDescription();
+        nodeDescription.setPath(schemaNode.getSchemaPath().toString());
+        nodeDescription.setDescription(
+                schemaNode.getDescription() == null ? "" : schemaNode.getDescription().getArgStr());
+        nodeDescription.setConfig(schemaNode.isConfig() ? "true" : "false");
+        nodeDescription.setSchemaType(schemaNode.getYangKeyword().getLocalName());
+        if (schemaNode instanceof TypedDataNode) {
+            TypedDataNode typedDataNode = (TypedDataNode) schemaNode;
+            nodeDescription.setNodeType(typedDataNode.getType().getArgStr());
+        }
+        nodeDescription.setModule(schemaNode.getContext().getCurModule().getArgStr());
+        nodeDescription.setActive(schemaNode.isActive());
+        nodeDescription.setDeviated(schemaNode.isDeviated());
+        for (Tag tag : tags) {
+            String field = tag.getField();
+            FName prefixedName = new FName(field);
+            QName keyword = null;
+            if (prefixedName.getPrefix() == null) {
+                keyword = new QName(Yang.NAMESPACE, prefixedName.getLocalName());
+            } else {
+                YangSchemaContext schemaContext = schemaNode.getContext().getSchemaContext();
+                List<Module> matched = schemaContext.getModule(prefixedName.getPrefix());
+                if (matched == null || matched.isEmpty()) {
+                    continue;
+                }
+                URI namespace = matched.get(0).getMainModule().getNamespace().getUri();
+                keyword = new QName(namespace, prefixedName.getLocalName());
+            }
+            if (tag.getValue() == null || tag.getValue().isEmpty()) {
+                List<YangStatement> statements = schemaNode.getSubStatement(keyword);
+                if (!statements.isEmpty()) {
+                    String arg = statements.get(0).getArgStr();
+                    if (arg == null || arg.isEmpty()) {
+                        arg = "true";
+                    }
+                    Tag nodeTag = new Tag(tag.getName(), tag.getField());
+                    nodeTag.setValue(arg);
+                    nodeDescription.addTag(nodeTag);
+                }
+            } else {
+                YangStatement statement = schemaNode.getSubStatement(keyword, tag.getValue());
+                if (statement != null) {
+                    Tag nodeTag = new Tag(tag.getName(), tag.getField());
+                    nodeTag.setValue(tag.getValue());
+                    nodeDescription.addTag(nodeTag);
+                }
+            }
+        }
+        return nodeDescription;
+    }
+
+    /**
+     * get node description for schema node container.
+     *
+     * @param schemaNodeContainer schema node container
+     * @return list of node description.
+     */
+    public List<YangNodeDescription> getNodeDescriptions(SchemaNodeContainer schemaNodeContainer) {
+        if (schemaNodeContainer == null) {
+            return new ArrayList<>();
+        }
+        List<YangNodeDescription> nodeDescriptions = new ArrayList<>();
+        if (schemaNodeContainer instanceof SchemaNode) {
+            SchemaNode schemaNode = (SchemaNode) schemaNodeContainer;
+            YangNodeDescription nodeDescription = getNodeDescription(schemaNode);
+            if (nodeDescription != null) {
+                nodeDescriptions.add(nodeDescription);
+            }
+        }
+
+        for (SchemaNode schemaNode : schemaNodeContainer.getSchemaNodeChildren()) {
+            List<Module> modules = schemaNode.getContext().getSchemaContext().getModules();
+            Module curModule = schemaNode.getContext().getCurModule().getMainModule();
+            if (!modules.contains(curModule)) {
+                //only include the schema node belongs to modules of schema context
+                continue;
+            }
+
+            if (schemaNode instanceof SchemaNodeContainer) {
+                nodeDescriptions.addAll(getNodeDescriptions((SchemaNodeContainer) schemaNode));
+            } else {
+                YangNodeDescription nodeDescription = getNodeDescription(schemaNode);
+                if (nodeDescription != null) {
+                    nodeDescriptions.add(nodeDescription);
+                }
+            }
+        }
+        return nodeDescriptions;
+    }
+
+    /**
+     * get yang statistics for yang schema context.
+     *
+     * @param schemaContext yang schema context.
+     * @return list of node description.
+     */
+    public List<YangNodeDescription> getYangStatistics(YangSchemaContext schemaContext) {
+        List<YangNodeDescription> nodeDescriptions = new ArrayList<>();
+        if (schemaContext == null) {
+            return nodeDescriptions;
+        }
+        for (Module module : schemaContext.getModules()) {
+            if (module instanceof SubModule) {
+                continue;
+            }
+            nodeDescriptions.addAll(getNodeDescriptions(module));
+        }
+        return nodeDescriptions;
+    }
+
+    /**
+     * serialize the yang statistics of schema context to xlsx format.
+     *
+     * @param schemaContext yang schema context.
+     * @return xlsx document
+     */
+    public SXSSFWorkbook serializeXlsx(YangSchemaContext schemaContext) {
+        SXSSFWorkbook workbook = new SXSSFWorkbook();
+        SXSSFSheet summary = workbook.createSheet("summary");
+        summary.setDisplayGridlines(true);
+        summary.setAutobreaks(true);
+        summary.setColumnWidth(0, 5000);
+        summary.setColumnWidth(1, 5000);
+        SXSSFRow sumFirstRow = summary.createRow(0);
+        SXSSFCell totalModules = sumFirstRow.createCell(0);
+        totalModules.setCellValue("Total modules:");
+        SXSSFCell totalModulesVal = sumFirstRow.createCell(1);
+        totalModulesVal.setCellValue(schemaContext.getModules().size());
+
+        SXSSFSheet detail = workbook.createSheet("detail");
+        detail.setDisplayGridlines(true);
+        detail.setAutobreaks(true);
+        detail.setColumnWidth(0, 20000);
+        detail.setColumnWidth(1, 5000);
+        detail.setColumnWidth(2, 20000);
+        detail.setColumnWidth(3, 5000);
+        detail.setColumnWidth(4, 5000);
+        detail.setColumnWidth(5, 5000);
+        detail.setColumnWidth(6, 5000);
+        detail.setColumnWidth(7, 5000);
+        int size = tags.size();
+        for (int i = 0; i < size; i++) {
+            detail.setColumnWidth(8 + i, 5000);
+        }
+
+        CellStyle style = workbook.createCellStyle();
+        style.setBorderBottom(BorderStyle.THIN);
+        style.setBorderLeft(BorderStyle.THIN);
+        style.setBorderRight(BorderStyle.THIN);
+        style.setBorderTop(BorderStyle.THIN);
+
+        CellStyle desStyle = workbook.createCellStyle();
+        desStyle.cloneStyleFrom(style);
+        desStyle.setAlignment(HorizontalAlignment.JUSTIFY);
+
+        detail.setDefaultColumnStyle(0, style);
+        detail.setDefaultColumnStyle(1, desStyle);
+        detail.setDefaultColumnStyle(2, style);
+        detail.setDefaultColumnStyle(3, style);
+        detail.setDefaultColumnStyle(4, style);
+        detail.setDefaultColumnStyle(5, style);
+        detail.setDefaultColumnStyle(6, style);
+        detail.setDefaultColumnStyle(7, style);
+        for (int i = 0; i < size; i++) {
+            detail.setDefaultColumnStyle(8 + i, style);
+        }
+        //generate header
+        SXSSFRow firstRow = detail.createRow(0);
+        SXSSFCell yangpath = firstRow.createCell(0);
+        yangpath.setCellValue("Path");
+        yangpath.setCellStyle(style);
+        SXSSFCell active = firstRow.createCell(1);
+        active.setCellValue("Active");
+        active.setCellStyle(style);
+        SXSSFCell description = firstRow.createCell(2);
+        description.setCellValue("Description");
+        description.setCellStyle(style);
+        SXSSFCell config = firstRow.createCell(3);
+        config.setCellValue("Config");
+        config.setCellStyle(style);
+        SXSSFCell schema = firstRow.createCell(4);
+        schema.setCellValue("schema");
+        schema.setCellStyle(style);
+        SXSSFCell type = firstRow.createCell(5);
+        type.setCellValue("type");
+        type.setCellStyle(style);
+        SXSSFCell moduleHeader = firstRow.createCell(6);
+        moduleHeader.setCellValue("module");
+        moduleHeader.setCellStyle(style);
+        SXSSFCell deviated = firstRow.createCell(7);
+        deviated.setCellValue("deviated");
+        deviated.setCellStyle(style);
+        for (int i = 0; i < size; i++) {
+            SXSSFCell tagCell = firstRow.createCell(8 + i);
+            tagCell.setCellValue(tags.get(i).getName());
+            tagCell.setCellStyle(style);
+        }
+
+        List<YangNodeDescription> totalPaths = getYangStatistics(schemaContext);
+
+
+        if (null != totalPaths) {
+            int pathSize = totalPaths.size();
+            SXSSFRow summarySecRow = summary.createRow(1);
+            SXSSFCell totalNodes = summarySecRow.createCell(0);
+            totalNodes.setCellValue("Total nodes:");
+            SXSSFCell totalNodesVal = summarySecRow.createCell(1);
+            totalNodesVal.setCellValue(pathSize);
+            for (int i = 0; i < pathSize; i++) {
+                YangNodeDescription path = totalPaths.get(i);
+                SXSSFRow row = detail.createRow(i + 1);
+                SXSSFCell pathCell = row.createCell(0);
+                pathCell.setCellValue(path.getPath());
+                pathCell.setCellStyle(style);
+                SXSSFCell activeCell = row.createCell(1);
+                activeCell.setCellValue(path.isActive());
+                activeCell.setCellStyle(style);
+                SXSSFCell descriptionCell = row.createCell(2);
+                String str = path.getDescription();
+                if (str.length() >= 32767) {
+                    str = str.substring(0, 32767);
+                }
+                descriptionCell.setCellValue(str);
+                descriptionCell.setCellStyle(desStyle);
+
+                SXSSFCell configCell = row.createCell(3);
+                configCell.setCellValue(path.getConfig());
+                configCell.setCellStyle(style);
+
+                SXSSFCell schemaCell = row.createCell(4);
+                schemaCell.setCellValue(path.getSchemaType());
+                schemaCell.setCellStyle(style);
+
+                SXSSFCell typeCell = row.createCell(5);
+                typeCell.setCellValue(path.getNodeType());
+                typeCell.setCellStyle(style);
+
+                SXSSFCell moduleCell = row.createCell(6);
+                moduleCell.setCellValue(path.getModule());
+                moduleCell.setCellStyle(style);
+                SXSSFCell deviateCell = row.createCell(7);
+                deviateCell.setCellValue(path.isDeviated());
+                deviateCell.setCellStyle(style);
+                for (int j = 0; j < size; j++) {
+                    SXSSFCell tagValCell = row.createCell(8 + j);
+                    Tag valueTag = path.getTag(tags.get(j).getName());
+                    if (valueTag == null) {
+                        tagValCell.setCellValue("");
+                    } else {
+                        tagValCell.setCellValue(valueTag.getValue());
+                    }
+
+                    tagValCell.setCellStyle(style);
+                }
+            }
+        }
+        return workbook;
+    }
+
+    /**
+     * a yang compiler plugin implementation (run method).
+     *
+     * @param schemaContext yang schema context
+     * @param yangCompiler  yang compiler instance
+     * @param parameters    parameters for plugin
+     * @throws YangCompilerException if error occurs, throw the exception
+     */
+    @Override
+    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,
+                    List<YangCompilerPluginParameter> parameters) throws YangCompilerException {
+
+        for (YangCompilerPluginParameter parameter : parameters) {
+            if (parameter.getName().equals("output")) {
+                output = (String) (parameter.getValue());
+            } else {
+                tags = (List<Tag>) (parameter.getValue());
+            }
+        }
+
+        SXSSFWorkbook workbook = serializeXlsx(schemaContext);
+        try {
+            File out = new File(output);
+            if (!out.exists()) {
+                File parent = out.getParentFile();
+                if (!parent.exists()) {
+                    parent.mkdirs();
+                }
+            }
+            workbook.write(new FileOutputStream(out));
+            workbook.close();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+
+    @Override
+    public YangCompilerPluginParameter getParameter(String name, JsonElement value) throws YangCompilerException {
+        if (!name.equals("output") && !name.equals("tag")) {
+            throw new YangCompilerException("unknown parameter:" + name);
+        }
+        YangCompilerPluginParameter yangCompilerPluginParameter = new YangCompilerPluginParameter() {
+            @Override
+            public String getName() {
+                return name;
+            }
+
+            @Override
+            public Object getValue() {
+                if (name.equals("output")) {
+                    return value.getAsString();
+                } else {
+                    List<Tag> tags = new ArrayList<>();
+                    JsonArray tagArray = value.getAsJsonArray();
+                    int size = tagArray.size();
+                    for (int i = 0; i < size; i++) {
+                        JsonObject tagElement = tagArray.get(i).getAsJsonObject();
+                        String name = tagElement.get("name").getAsString();
+                        String keyword = tagElement.get("keyword").getAsString();
+                        Tag tag = new Tag(name, keyword);
+                        if (tagElement.get("value") != null) {
+                            tag.setValue(tagElement.get("value").getAsString());
+                        }
+                        tags.add(tag);
+                    }
+                    return tags;
+                }
+
+            }
+
+        };
+        return yangCompilerPluginParameter;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/validator/YangValidator.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/validator/YangValidator.java
index 5131416..5523dda 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/validator/YangValidator.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/validator/YangValidator.java
@@ -1,46 +1,47 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.validator;

-

-import java.util.List;

-

-import org.onap.modeling.yangkit.compiler.YangCompiler;

-import org.onap.modeling.yangkit.compiler.YangCompilerException;

-import org.onap.modeling.yangkit.plugin.YangCompilerPlugin;

-import org.onap.modeling.yangkit.plugin.YangCompilerPluginParameter;

-import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;

-import org.yangcentral.yangkit.utils.file.FileUtil;

-

-

-public class YangValidator implements YangCompilerPlugin {

-    /**

-     * the implementation of run method.

-     * @param schemaContext yang schema context.

-     * @param yangCompiler yang compiler instance.

-     * @param parameters parameters of plugin.

-     * @throws YangCompilerException if error occurs, the exception will be thrown.

-     */

-    @Override

-    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,

-                    List<YangCompilerPluginParameter> parameters) throws YangCompilerException {

-        YangCompilerPluginParameter parameter = parameters.get(0);

-        if (!parameter.getName().equals("output")) {

-            throw new YangCompilerException("unknown parameter:" + parameter.getName());

-        }

-        FileUtil.writeUtf8File((String) parameter.getValue(), schemaContext.getValidateResult().toString());

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.validator;
+
+import java.util.List;
+
+import org.onap.modeling.yangkit.compiler.YangCompiler;
+import org.onap.modeling.yangkit.compiler.YangCompilerException;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPlugin;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPluginParameter;
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+import org.yangcentral.yangkit.utils.file.FileUtil;
+
+
+
+public class YangValidator implements YangCompilerPlugin {
+    /**
+     * the implementation of run method.
+     * @param schemaContext yang schema context.
+     * @param yangCompiler yang compiler instance.
+     * @param parameters parameters of plugin.
+     * @throws YangCompilerException if error occurs, the exception will be thrown.
+     */
+    @Override
+    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,
+                    List<YangCompilerPluginParameter> parameters) throws YangCompilerException {
+        YangCompilerPluginParameter parameter = parameters.get(0);
+        if (!parameter.getName().equals("output")) {
+            throw new YangCompilerException("unknown parameter:" + parameter.getName());
+        }
+        FileUtil.writeUtf8File((String) parameter.getValue(), schemaContext.getValidateResult().toString());
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/ModuleInfo.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/ModuleInfo.java
index 1b2a4b4..d9871c0 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/ModuleInfo.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/ModuleInfo.java
@@ -1,117 +1,117 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangpackage;

-

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-

-import java.net.URI;

-import java.util.AbstractMap;

-import java.util.ArrayList;

-import java.util.List;

-import java.util.Map;

-

-

-public class ModuleInfo extends SubComponentInfo {

-    private URI namespace;

-    private final List<SubModuleInfo> subModules = new ArrayList<>();

-

-    /**

-     * constructor.

-     * @param name module name

-     * @param revision module revision

-     */

-    public ModuleInfo(String name, String revision) {

-        super(name, revision);

-    }

-

-    /**

-     * constructor.

-     * @param name module name

-     */

-    public ModuleInfo(String name) {

-        super(name);

-    }

-

-    /**

-     * serialize the revision.

-     * @return serialized revision

-     */

-    @Override

-    protected Map.Entry<String, String> serializeRevision() {

-        if (this.getRevision() == null) {

-            return null;

-        }

-        return new AbstractMap.SimpleEntry<>("revision", this.getRevision());

-    }

-

-    /**

-     * get namespace.

-     * @return the uri of namespace

-     */

-    public URI getNamespace() {

-        return namespace;

-    }

-

-    /**

-     * set namespace.

-     * @param namespace the uri of namespace

-     */

-    public void setNamespace(URI namespace) {

-        this.namespace = namespace;

-    }

-

-    /**

-     * get submodules.

-     * @return list of submodules.

-     */

-    public List<SubModuleInfo> getSubModules() {

-        return subModules;

-    }

-

-    /**

-     * add submodule.

-     * @param subModuleInfo submodule

-     */

-    public void addSubModule(SubModuleInfo subModuleInfo) {

-        if (subModules.contains(subModuleInfo)) {

-            return;

-        }

-        subModules.add(subModuleInfo);

-    }

-

-    /**

-     * serialize the module information.

-     * @return json element.

-     */

-    @Override

-    public JsonElement serialize() {

-        JsonObject jsonObject = super.serialize().getAsJsonObject();

-        if (this.getNamespace() != null) {

-            jsonObject.addProperty("namespace", this.getNamespace().toString());

-        }

-        if (!this.getSubModules().isEmpty()) {

-            JsonArray subModules = new JsonArray();

-            for (SubModuleInfo subModule : this.getSubModules()) {

-                subModules.add(subModule.serialize());

-            }

-            jsonObject.add("submodule", subModules);

-        }

-        return jsonObject;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangpackage;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.net.URI;
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+
+public class ModuleInfo extends SubComponentInfo {
+    private URI namespace;
+    private final List<SubModuleInfo> subModules = new ArrayList<>();
+
+    /**
+     * constructor.
+     * @param name module name
+     * @param revision module revision
+     */
+    public ModuleInfo(String name, String revision) {
+        super(name, revision);
+    }
+
+    /**
+     * constructor.
+     * @param name module name
+     */
+    public ModuleInfo(String name) {
+        super(name);
+    }
+
+    /**
+     * serialize the revision.
+     * @return serialized revision
+     */
+    @Override
+    protected Map.Entry<String, String> serializeRevision() {
+        if (this.getRevision() == null) {
+            return null;
+        }
+        return new AbstractMap.SimpleEntry<>("revision", this.getRevision());
+    }
+
+    /**
+     * get namespace.
+     * @return the uri of namespace
+     */
+    public URI getNamespace() {
+        return namespace;
+    }
+
+    /**
+     * set namespace.
+     * @param namespace the uri of namespace
+     */
+    public void setNamespace(URI namespace) {
+        this.namespace = namespace;
+    }
+
+    /**
+     * get submodules.
+     * @return list of submodules.
+     */
+    public List<SubModuleInfo> getSubModules() {
+        return subModules;
+    }
+
+    /**
+     * add submodule.
+     * @param subModuleInfo submodule
+     */
+    public void addSubModule(SubModuleInfo subModuleInfo) {
+        if (subModules.contains(subModuleInfo)) {
+            return;
+        }
+        subModules.add(subModuleInfo);
+    }
+
+    /**
+     * serialize the module information.
+     * @return json element.
+     */
+    @Override
+    public JsonElement serialize() {
+        JsonObject jsonObject = super.serialize().getAsJsonObject();
+        if (this.getNamespace() != null) {
+            jsonObject.addProperty("namespace", this.getNamespace().toString());
+        }
+        if (!this.getSubModules().isEmpty()) {
+            JsonArray subModules = new JsonArray();
+            for (SubModuleInfo subModule : this.getSubModules()) {
+                subModules.add(subModule.serialize());
+            }
+            jsonObject.add("submodule", subModules);
+        }
+        return jsonObject;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/PackageInfo.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/PackageInfo.java
index a46f5f3..d61560d 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/PackageInfo.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/PackageInfo.java
@@ -1,45 +1,45 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangpackage;

-

-import java.util.AbstractMap;

-import java.util.Map;

-

-

-public class PackageInfo extends SubComponentInfo {

-    /**

-     * constructor.

-     * @param name package name

-     * @param revision package revision.

-     */

-    public PackageInfo(String name, String revision) {

-        super(name, revision);

-    }

-

-    /**

-     * serialize the revision.

-     * @return serialized revision.

-     */

-    @Override

-    protected Map.Entry<String, String> serializeRevision() {

-        if (this.getRevision() == null) {

-            return null;

-        }

-        Map.Entry<String, String> revisionEntry = new AbstractMap.SimpleEntry<>("version", this.getRevision());

-        return revisionEntry;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangpackage;
+
+import java.util.AbstractMap;
+import java.util.Map;
+
+
+public class PackageInfo extends SubComponentInfo {
+    /**
+     * constructor.
+     * @param name package name
+     * @param revision package revision.
+     */
+    public PackageInfo(String name, String revision) {
+        super(name, revision);
+    }
+
+    /**
+     * serialize the revision.
+     * @return serialized revision.
+     */
+    @Override
+    protected Map.Entry<String, String> serializeRevision() {
+        if (this.getRevision() == null) {
+            return null;
+        }
+        Map.Entry<String, String> revisionEntry = new AbstractMap.SimpleEntry<>("version", this.getRevision());
+        return revisionEntry;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/SubComponentInfo.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/SubComponentInfo.java
index 6cdd005..fffdcce 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/SubComponentInfo.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/SubComponentInfo.java
@@ -1,171 +1,171 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangpackage;

-

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-

-import java.net.URI;

-import java.util.ArrayList;

-import java.util.List;

-import java.util.Map;

-import java.util.Objects;

-

-

-public abstract class SubComponentInfo {

-    private final String name;

-    private String revision;

-    private final List<String> replaceRevisions = new ArrayList<>();

-    private List<URI> locations;

-

-    /**

-     * constructor.

-     * @param name the name of subcomponent.

-     * @param revision the revision of subcomponent.

-     */

-    public SubComponentInfo(String name, String revision) {

-        this.name = name;

-        this.revision = revision;

-    }

-

-    /**

-     * constructor.

-     * @param name the name of subcomponent.

-     */

-    public SubComponentInfo(String name) {

-        this.name = name;

-    }

-

-    /**

-     * get the name of subcomponent.

-     * @return name.

-     */

-    public String getName() {

-        return name;

-    }

-

-    /**

-     * get the revision of subcomponent.

-     * @return revision

-     */

-    public String getRevision() {

-        return revision;

-    }

-

-    /**

-     * set the revision of subcomponent.

-     * @param revision revision

-     */

-    public void setRevision(String revision) {

-        this.revision = revision;

-    }

-

-    /**

-     * get the replaced revisions.

-     * @return the list of revisions.

-     */

-    public List<String> getReplaceRevisions() {

-        return replaceRevisions;

-    }

-

-    /**

-     * add replace revision.

-     * @param revision the revision to be replaced.

-     */

-    public void addReplaceRevision(String revision) {

-        if (replaceRevisions.contains(revision)) {

-            return;

-        }

-        replaceRevisions.add(revision);

-    }

-

-    /**

-     * get locations of subcomponent.

-     * @return list of location uri.

-     */

-    public List<URI> getLocations() {

-        return locations;

-    }

-

-    /**

-     * add location.

-     * @param location location uri.

-     */

-    public void addLocation(URI location) {

-        if (locations.contains(location)) {

-            return;

-        }

-        locations.add(location);

-    }

-

-    /**

-     * equals method.

-     * @param obj other object.

-     * @return true or false.

-     */

-    @Override

-    public boolean equals(Object obj) {

-        if (this == obj) {

-            return true;

-        }

-        if (!(obj instanceof SubComponentInfo)) {

-            return false;

-        }

-        SubComponentInfo that = (SubComponentInfo) obj;

-        return getName().equals(that.getName()) && getRevision().equals(that.getRevision());

-    }

-

-    @Override

-    public int hashCode() {

-        return Objects.hash(getName(), getRevision());

-    }

-

-    /**

-     * the abstract method of serialize the revision.

-     * @return serialized revision.

-     */

-    protected abstract Map.Entry<String, String> serializeRevision();

-

-    /**

-     * serialize the subcomponent to json element.

-     * @return json element.

-     */

-    public JsonElement serialize() {

-        JsonObject jsonObject = new JsonObject();

-        jsonObject.addProperty("name", this.getName());

-        if (this.getRevision() != null) {

-            Map.Entry<String, String> revisionEntry = serializeRevision();

-            jsonObject.addProperty(revisionEntry.getKey(), revisionEntry.getValue());

-        }

-        if (!this.getReplaceRevisions().isEmpty()) {

-            JsonArray replaceRevisions = new JsonArray();

-            for (String replaceRevision : this.getReplaceRevisions()) {

-                replaceRevisions.add(replaceRevision);

-            }

-            jsonObject.add("replaces-version", replaceRevisions);

-        }

-        if (!this.getLocations().isEmpty()) {

-            JsonArray locations = new JsonArray();

-            for (URI location : this.getLocations()) {

-                locations.add(location.toString());

-            }

-            jsonObject.add("location", locations);

-        }

-        return jsonObject;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangpackage;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+
+public abstract class SubComponentInfo {
+    private final String name;
+    private String revision;
+    private final List<String> replaceRevisions = new ArrayList<>();
+    private List<URI> locations;
+
+    /**
+     * constructor.
+     * @param name the name of subcomponent.
+     * @param revision the revision of subcomponent.
+     */
+    public SubComponentInfo(String name, String revision) {
+        this.name = name;
+        this.revision = revision;
+    }
+
+    /**
+     * constructor.
+     * @param name the name of subcomponent.
+     */
+    public SubComponentInfo(String name) {
+        this.name = name;
+    }
+
+    /**
+     * get the name of subcomponent.
+     * @return name.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * get the revision of subcomponent.
+     * @return revision
+     */
+    public String getRevision() {
+        return revision;
+    }
+
+    /**
+     * set the revision of subcomponent.
+     * @param revision revision
+     */
+    public void setRevision(String revision) {
+        this.revision = revision;
+    }
+
+    /**
+     * get the replaced revisions.
+     * @return the list of revisions.
+     */
+    public List<String> getReplaceRevisions() {
+        return replaceRevisions;
+    }
+
+    /**
+     * add replace revision.
+     * @param revision the revision to be replaced.
+     */
+    public void addReplaceRevision(String revision) {
+        if (replaceRevisions.contains(revision)) {
+            return;
+        }
+        replaceRevisions.add(revision);
+    }
+
+    /**
+     * get locations of subcomponent.
+     * @return list of location uri.
+     */
+    public List<URI> getLocations() {
+        return locations;
+    }
+
+    /**
+     * add location.
+     * @param location location uri.
+     */
+    public void addLocation(URI location) {
+        if (locations.contains(location)) {
+            return;
+        }
+        locations.add(location);
+    }
+
+    /**
+     * equals method.
+     * @param obj other object.
+     * @return true or false.
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof SubComponentInfo)) {
+            return false;
+        }
+        SubComponentInfo that = (SubComponentInfo) obj;
+        return getName().equals(that.getName()) && getRevision().equals(that.getRevision());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getName(), getRevision());
+    }
+
+    /**
+     * the abstract method of serialize the revision.
+     * @return serialized revision.
+     */
+    protected abstract Map.Entry<String, String> serializeRevision();
+
+    /**
+     * serialize the subcomponent to json element.
+     * @return json element.
+     */
+    public JsonElement serialize() {
+        JsonObject jsonObject = new JsonObject();
+        jsonObject.addProperty("name", this.getName());
+        if (this.getRevision() != null) {
+            Map.Entry<String, String> revisionEntry = serializeRevision();
+            jsonObject.addProperty(revisionEntry.getKey(), revisionEntry.getValue());
+        }
+        if (!this.getReplaceRevisions().isEmpty()) {
+            JsonArray replaceRevisions = new JsonArray();
+            for (String replaceRevision : this.getReplaceRevisions()) {
+                replaceRevisions.add(replaceRevision);
+            }
+            jsonObject.add("replaces-version", replaceRevisions);
+        }
+        if (!this.getLocations().isEmpty()) {
+            JsonArray locations = new JsonArray();
+            for (URI location : this.getLocations()) {
+                locations.add(location.toString());
+            }
+            jsonObject.add("location", locations);
+        }
+        return jsonObject;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/SubModuleInfo.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/SubModuleInfo.java
index eb290fc..0c5848b 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/SubModuleInfo.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/SubModuleInfo.java
@@ -1,125 +1,125 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangpackage;

-

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-

-import java.net.URI;

-import java.util.ArrayList;

-import java.util.List;

-import java.util.Objects;

-

-

-public class SubModuleInfo {

-    private final String name;

-    private final String revision;

-    private List<URI> locations = new ArrayList<>();

-

-    /**

-     * constructor.

-     * @param name submodule name

-     * @param revision submodule revision

-     */

-    public SubModuleInfo(String name, String revision) {

-        this.name = name;

-        this.revision = revision;

-    }

-

-    /**

-     * get the submodule name.

-     * @return name

-     */

-    public String getName() {

-        return name;

-    }

-

-    /**

-     * get the revision of submodule.

-     * @return revision

-     */

-    public String getRevision() {

-        return revision;

-    }

-

-    /**

-     * get locations of submodule.

-     * @return list of location.

-     */

-    public List<URI> getLocations() {

-        return locations;

-    }

-

-    /**

-     * set the locations.

-     * @param locations list of location.

-     */

-    public void setLocations(List<URI> locations) {

-        this.locations = locations;

-    }

-

-    /**

-     * add a location.

-     * @param location location uri

-     */

-    public void addLocation(URI location) {

-        if (locations.contains(location)) {

-            return;

-        }

-        locations.add(location);

-    }

-

-    @Override

-    public boolean equals(Object obj) {

-        if (this == obj) {

-            return true;

-        }

-        if (!(obj instanceof SubModuleInfo)) {

-            return false;

-        }

-        SubModuleInfo that = (SubModuleInfo) obj;

-        return getName().equals(that.getName()) && getRevision().equals(that.getRevision());

-    }

-

-    @Override

-    public int hashCode() {

-        return Objects.hash(getName(), getRevision());

-    }

-

-    /**

-     * serialize submodule to json.

-     * @return json element.

-     */

-    public JsonElement serialize() {

-        JsonObject jsonObject = new JsonObject();

-        jsonObject.addProperty("name", this.getName());

-        if (this.getRevision() != null) {

-            jsonObject.addProperty("revision", this.getRevision());

-        }

-

-        if (!this.getLocations().isEmpty()) {

-            JsonArray locations = new JsonArray();

-            for (URI location : this.getLocations()) {

-                locations.add(location.toString());

-            }

-            jsonObject.add("location", locations);

-        }

-        return jsonObject;

-

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangpackage;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+
+public class SubModuleInfo {
+    private final String name;
+    private final String revision;
+    private List<URI> locations = new ArrayList<>();
+
+    /**
+     * constructor.
+     * @param name submodule name
+     * @param revision submodule revision
+     */
+    public SubModuleInfo(String name, String revision) {
+        this.name = name;
+        this.revision = revision;
+    }
+
+    /**
+     * get the submodule name.
+     * @return name
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * get the revision of submodule.
+     * @return revision
+     */
+    public String getRevision() {
+        return revision;
+    }
+
+    /**
+     * get locations of submodule.
+     * @return list of location.
+     */
+    public List<URI> getLocations() {
+        return locations;
+    }
+
+    /**
+     * set the locations.
+     * @param locations list of location.
+     */
+    public void setLocations(List<URI> locations) {
+        this.locations = locations;
+    }
+
+    /**
+     * add a location.
+     * @param location location uri
+     */
+    public void addLocation(URI location) {
+        if (locations.contains(location)) {
+            return;
+        }
+        locations.add(location);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof SubModuleInfo)) {
+            return false;
+        }
+        SubModuleInfo that = (SubModuleInfo) obj;
+        return getName().equals(that.getName()) && getRevision().equals(that.getRevision());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getName(), getRevision());
+    }
+
+    /**
+     * serialize submodule to json.
+     * @return json element.
+     */
+    public JsonElement serialize() {
+        JsonObject jsonObject = new JsonObject();
+        jsonObject.addProperty("name", this.getName());
+        if (this.getRevision() != null) {
+            jsonObject.addProperty("revision", this.getRevision());
+        }
+
+        if (!this.getLocations().isEmpty()) {
+            JsonArray locations = new JsonArray();
+            for (URI location : this.getLocations()) {
+                locations.add(location.toString());
+            }
+            jsonObject.add("location", locations);
+        }
+        return jsonObject;
+
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/YangPackage.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/YangPackage.java
index 2a7913f..a1997de 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/YangPackage.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/YangPackage.java
@@ -1,395 +1,395 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangpackage;

-

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-

-import java.util.ArrayList;

-import java.util.List;

-

-

-public class YangPackage {

-    private final String name;

-    private final String revision;

-    private String timestamp;

-    private String organization;

-    private String contact;

-    private String description;

-    private String reference;

-    private boolean complete = true;

-    private boolean local;

-    private List<String> tags = new ArrayList<>();

-    private List<String> mandatoryFeatures = new ArrayList<>();

-    private List<PackageInfo> includePackages = new ArrayList<>();

-    private List<ModuleInfo> modules = new ArrayList<>();

-    private List<ModuleInfo> importOnlyModules = new ArrayList<>();

-

-    /**

-     * constructor.

-     * @param name package name

-     * @param revision package revision

-     */

-    public YangPackage(String name, String revision) {

-        this.name = name;

-        this.revision = revision;

-    }

-

-    /**

-     * get the package name.

-     * @return name

-     */

-    public String getName() {

-        return name;

-    }

-

-    /**

-     * get the package revision.

-     * @return revision

-     */

-    public String getRevision() {

-        return revision;

-    }

-

-    /**

-     * get the timestamp.

-     * @return timestamp.

-     */

-    public String getTimestamp() {

-        return timestamp;

-    }

-

-    /**

-     * set the timestamp.

-     * @param timestamp timestamp

-     */

-    public void setTimestamp(String timestamp) {

-        this.timestamp = timestamp;

-    }

-

-    /**

-     * get organization.

-     * @return organization.

-     */

-    public String getOrganization() {

-        return organization;

-    }

-

-    /**

-     * set organization.

-     * @param organization organization

-     */

-    public void setOrganization(String organization) {

-        this.organization = organization;

-    }

-

-    /**

-     * get contact information.

-     * @return contact.

-     */

-    public String getContact() {

-        return contact;

-    }

-

-    /**

-     * set the contact.

-     * @param contact contact.

-     */

-    public void setContact(String contact) {

-        this.contact = contact;

-    }

-

-    /**

-     * get description.

-     * @return description.

-     */

-    public String getDescription() {

-        return description;

-    }

-

-    /**

-     * set description.

-     * @param description description.

-     */

-    public void setDescription(String description) {

-        this.description = description;

-    }

-

-    /**

-     * get reference.

-     * @return reference.

-     */

-    public String getReference() {

-        return reference;

-    }

-

-    /**

-     * set reference.

-     * @param reference reference.

-     */

-    public void setReference(String reference) {

-        this.reference = reference;

-    }

-

-    /**

-     * whether the package is complete.

-     * @return true or false.

-     */

-    public boolean isComplete() {

-        return complete;

-    }

-

-    /**

-     * set whether the package is complete.

-     * @param complete true or false.

-     */

-    public void setComplete(boolean complete) {

-        this.complete = complete;

-    }

-

-    /**

-     * whether the package is local.

-     * @return true or false

-     */

-    public boolean isLocal() {

-        return local;

-    }

-

-    /**

-     * set whether the package is local.

-     * @param local true or false

-     */

-    public void setLocal(boolean local) {

-        this.local = local;

-    }

-

-    /**

-     * get the tags of package.

-     * @return the list of tags.

-     */

-    public List<String> getTags() {

-        return tags;

-    }

-

-    /**

-     * set the tags of package.

-     * @param tags the list of tags.

-     */

-    public void setTags(List<String> tags) {

-        this.tags = tags;

-    }

-

-    /**

-     * add a tag to package.

-     * @param tag tag

-     */

-    public void addTag(String tag) {

-        if (tags.contains(tag)) {

-            return;

-        }

-        tags.add(tag);

-    }

-

-    /**

-     * get mandatory features of package.

-     * @return list of features.

-     */

-    public List<String> getMandatoryFeatures() {

-        return mandatoryFeatures;

-    }

-

-    /**

-     * set mandatory features.

-     * @param mandatoryFeatures list of mandatory features.

-     */

-    public void setMandatoryFeatures(List<String> mandatoryFeatures) {

-        this.mandatoryFeatures = mandatoryFeatures;

-    }

-

-    /**

-     * add mandatory feature.

-     * @param feature feature

-     */

-    public void addMandatoryFeature(String feature) {

-        if (mandatoryFeatures.contains(feature)) {

-            return;

-        }

-        mandatoryFeatures.add(feature);

-    }

-

-    /**

-     * get include packages.

-     * @return list of included packages.

-     */

-    public List<PackageInfo> getIncludePackages() {

-        return includePackages;

-    }

-

-    /**

-     * set the include packages.

-     * @param includePackages the list of include packages.

-     */

-    public void setIncludePackages(List<PackageInfo> includePackages) {

-        this.includePackages = includePackages;

-    }

-

-    /**

-     * add a include package.

-     * @param packageInfo package

-     */

-    public void addIncludePackage(PackageInfo packageInfo) {

-        if (includePackages.contains(packageInfo)) {

-            return;

-        }

-        includePackages.add(packageInfo);

-    }

-

-    /**

-     * get the modules of package.

-     * @return list of modules.

-     */

-    public List<ModuleInfo> getModules() {

-        return modules;

-    }

-

-    /**

-     * set the modules of package.

-     * @param modules list of modules

-     */

-    public void setModules(List<ModuleInfo> modules) {

-        this.modules = modules;

-    }

-

-    /**

-     * add a module to package.

-     * @param module module

-     */

-    public void addModule(ModuleInfo module) {

-        if (this.modules.contains(module)) {

-            return;

-        }

-        modules.add(module);

-    }

-

-    /**

-     * get import-only modules.

-     * @return list of modules.

-     */

-    public List<ModuleInfo> getImportOnlyModules() {

-        return importOnlyModules;

-    }

-

-    /**

-     * add a import-only module.

-     * @param module module

-     */

-    public void addImportOnlyModule(ModuleInfo module) {

-        if (importOnlyModules.contains(module)) {

-            return;

-        }

-        importOnlyModules.add(module);

-    }

-

-    /**

-     * set import-only modules.

-     * @param importOnlyModules list of modules

-     */

-    public void setImportOnlyModules(List<ModuleInfo> importOnlyModules) {

-        this.importOnlyModules = importOnlyModules;

-    }

-

-    /**

-     * serialize yang package to json.

-     * @return json element

-     */

-    public JsonElement serialize() {

-        JsonObject document = new JsonObject();

-        JsonObject instanceDataset = new JsonObject();

-        document.add("ietf-yang-instance-data:instance-data-set", instanceDataset);

-        instanceDataset.addProperty("name", this.getName());

-        JsonObject contentSchema = new JsonObject();

-        instanceDataset.add("content-schema", contentSchema);

-        JsonArray moduleArray = new JsonArray();

-        moduleArray.add("ietf-yang-package-instance@2020-01-21");

-        contentSchema.add("module", moduleArray);

-        JsonObject contentData = new JsonObject();

-        instanceDataset.add("content-data", contentData);

-        JsonObject yangPackage = new JsonObject();

-        contentData.add("ietf-yang-package-instance:yang-package", yangPackage);

-        yangPackage.addProperty("name", this.getName());

-        yangPackage.addProperty("version", this.getRevision());

-        // SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");

-        // String dateTime = sdf.format(new Date(System.currentTimeMillis()));

-        if (this.getTimestamp() != null) {

-            yangPackage.addProperty("timestamp", this.getTimestamp());

-        }

-

-        if (this.getOrganization() != null) {

-            yangPackage.addProperty("organization", this.getOrganization());

-        }

-        if (this.getContact() != null) {

-            yangPackage.addProperty("contact", this.getContact());

-        }

-        if (this.getDescription() != null) {

-            yangPackage.addProperty("description", this.getDescription());

-        }

-        if (this.getReference() != null) {

-            yangPackage.addProperty("reference", this.getReference());

-        }

-        yangPackage.addProperty("complete", this.isComplete());

-        yangPackage.addProperty("local", this.isLocal());

-

-        if (!this.getTags().isEmpty()) {

-            JsonArray tags = new JsonArray();

-            for (String tag : this.getTags()) {

-                tags.add(tag);

-            }

-            yangPackage.add("tag", tags);

-        }

-        if (!this.getMandatoryFeatures().isEmpty()) {

-            JsonArray mandatoryFeatures = new JsonArray();

-            for (String mandatoryFeature : this.getMandatoryFeatures()) {

-                mandatoryFeatures.add(mandatoryFeature);

-            }

-            yangPackage.add("mandatory-feature", mandatoryFeatures);

-        }

-        if (!this.getIncludePackages().isEmpty()) {

-            JsonArray includePackages = new JsonArray();

-            for (PackageInfo packageInfo : this.getIncludePackages()) {

-                includePackages.add(packageInfo.serialize());

-            }

-            yangPackage.add("included-package", includePackages);

-        }

-        if (!this.getModules().isEmpty()) {

-            JsonArray modules = new JsonArray();

-            for (ModuleInfo moduleInfo : this.getModules()) {

-                modules.add(moduleInfo.serialize());

-            }

-            yangPackage.add("module", modules);

-        }

-

-        if (!this.getImportOnlyModules().isEmpty()) {

-            JsonArray importOnlyModules = new JsonArray();

-            for (ModuleInfo importOnlyModule : this.getImportOnlyModules()) {

-                importOnlyModules.add(importOnlyModule.serialize());

-            }

-            yangPackage.add("import-only-module", importOnlyModules);

-        }

-        return yangPackage;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangpackage;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class YangPackage {
+    private final String name;
+    private final String revision;
+    private String timestamp;
+    private String organization;
+    private String contact;
+    private String description;
+    private String reference;
+    private boolean complete = true;
+    private boolean local;
+    private List<String> tags = new ArrayList<>();
+    private List<String> mandatoryFeatures = new ArrayList<>();
+    private List<PackageInfo> includePackages = new ArrayList<>();
+    private List<ModuleInfo> modules = new ArrayList<>();
+    private List<ModuleInfo> importOnlyModules = new ArrayList<>();
+
+    /**
+     * constructor.
+     * @param name package name
+     * @param revision package revision
+     */
+    public YangPackage(String name, String revision) {
+        this.name = name;
+        this.revision = revision;
+    }
+
+    /**
+     * get the package name.
+     * @return name
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * get the package revision.
+     * @return revision
+     */
+    public String getRevision() {
+        return revision;
+    }
+
+    /**
+     * get the timestamp.
+     * @return timestamp.
+     */
+    public String getTimestamp() {
+        return timestamp;
+    }
+
+    /**
+     * set the timestamp.
+     * @param timestamp timestamp
+     */
+    public void setTimestamp(String timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    /**
+     * get organization.
+     * @return organization.
+     */
+    public String getOrganization() {
+        return organization;
+    }
+
+    /**
+     * set organization.
+     * @param organization organization
+     */
+    public void setOrganization(String organization) {
+        this.organization = organization;
+    }
+
+    /**
+     * get contact information.
+     * @return contact.
+     */
+    public String getContact() {
+        return contact;
+    }
+
+    /**
+     * set the contact.
+     * @param contact contact.
+     */
+    public void setContact(String contact) {
+        this.contact = contact;
+    }
+
+    /**
+     * get description.
+     * @return description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * set description.
+     * @param description description.
+     */
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    /**
+     * get reference.
+     * @return reference.
+     */
+    public String getReference() {
+        return reference;
+    }
+
+    /**
+     * set reference.
+     * @param reference reference.
+     */
+    public void setReference(String reference) {
+        this.reference = reference;
+    }
+
+    /**
+     * whether the package is complete.
+     * @return true or false.
+     */
+    public boolean isComplete() {
+        return complete;
+    }
+
+    /**
+     * set whether the package is complete.
+     * @param complete true or false.
+     */
+    public void setComplete(boolean complete) {
+        this.complete = complete;
+    }
+
+    /**
+     * whether the package is local.
+     * @return true or false
+     */
+    public boolean isLocal() {
+        return local;
+    }
+
+    /**
+     * set whether the package is local.
+     * @param local true or false
+     */
+    public void setLocal(boolean local) {
+        this.local = local;
+    }
+
+    /**
+     * get the tags of package.
+     * @return the list of tags.
+     */
+    public List<String> getTags() {
+        return tags;
+    }
+
+    /**
+     * set the tags of package.
+     * @param tags the list of tags.
+     */
+    public void setTags(List<String> tags) {
+        this.tags = tags;
+    }
+
+    /**
+     * add a tag to package.
+     * @param tag tag
+     */
+    public void addTag(String tag) {
+        if (tags.contains(tag)) {
+            return;
+        }
+        tags.add(tag);
+    }
+
+    /**
+     * get mandatory features of package.
+     * @return list of features.
+     */
+    public List<String> getMandatoryFeatures() {
+        return mandatoryFeatures;
+    }
+
+    /**
+     * set mandatory features.
+     * @param mandatoryFeatures list of mandatory features.
+     */
+    public void setMandatoryFeatures(List<String> mandatoryFeatures) {
+        this.mandatoryFeatures = mandatoryFeatures;
+    }
+
+    /**
+     * add mandatory feature.
+     * @param feature feature
+     */
+    public void addMandatoryFeature(String feature) {
+        if (mandatoryFeatures.contains(feature)) {
+            return;
+        }
+        mandatoryFeatures.add(feature);
+    }
+
+    /**
+     * get include packages.
+     * @return list of included packages.
+     */
+    public List<PackageInfo> getIncludePackages() {
+        return includePackages;
+    }
+
+    /**
+     * set the include packages.
+     * @param includePackages the list of include packages.
+     */
+    public void setIncludePackages(List<PackageInfo> includePackages) {
+        this.includePackages = includePackages;
+    }
+
+    /**
+     * add a include package.
+     * @param packageInfo package
+     */
+    public void addIncludePackage(PackageInfo packageInfo) {
+        if (includePackages.contains(packageInfo)) {
+            return;
+        }
+        includePackages.add(packageInfo);
+    }
+
+    /**
+     * get the modules of package.
+     * @return list of modules.
+     */
+    public List<ModuleInfo> getModules() {
+        return modules;
+    }
+
+    /**
+     * set the modules of package.
+     * @param modules list of modules
+     */
+    public void setModules(List<ModuleInfo> modules) {
+        this.modules = modules;
+    }
+
+    /**
+     * add a module to package.
+     * @param module module
+     */
+    public void addModule(ModuleInfo module) {
+        if (this.modules.contains(module)) {
+            return;
+        }
+        modules.add(module);
+    }
+
+    /**
+     * get import-only modules.
+     * @return list of modules.
+     */
+    public List<ModuleInfo> getImportOnlyModules() {
+        return importOnlyModules;
+    }
+
+    /**
+     * add a import-only module.
+     * @param module module
+     */
+    public void addImportOnlyModule(ModuleInfo module) {
+        if (importOnlyModules.contains(module)) {
+            return;
+        }
+        importOnlyModules.add(module);
+    }
+
+    /**
+     * set import-only modules.
+     * @param importOnlyModules list of modules
+     */
+    public void setImportOnlyModules(List<ModuleInfo> importOnlyModules) {
+        this.importOnlyModules = importOnlyModules;
+    }
+
+    /**
+     * serialize yang package to json.
+     * @return json element
+     */
+    public JsonElement serialize() {
+        JsonObject document = new JsonObject();
+        JsonObject instanceDataset = new JsonObject();
+        document.add("ietf-yang-instance-data:instance-data-set", instanceDataset);
+        instanceDataset.addProperty("name", this.getName());
+        JsonObject contentSchema = new JsonObject();
+        instanceDataset.add("content-schema", contentSchema);
+        JsonArray moduleArray = new JsonArray();
+        moduleArray.add("ietf-yang-package-instance@2020-01-21");
+        contentSchema.add("module", moduleArray);
+        JsonObject contentData = new JsonObject();
+        instanceDataset.add("content-data", contentData);
+        JsonObject yangPackage = new JsonObject();
+        contentData.add("ietf-yang-package-instance:yang-package", yangPackage);
+        yangPackage.addProperty("name", this.getName());
+        yangPackage.addProperty("version", this.getRevision());
+        // SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
+        // String dateTime = sdf.format(new Date(System.currentTimeMillis()));
+        if (this.getTimestamp() != null) {
+            yangPackage.addProperty("timestamp", this.getTimestamp());
+        }
+
+        if (this.getOrganization() != null) {
+            yangPackage.addProperty("organization", this.getOrganization());
+        }
+        if (this.getContact() != null) {
+            yangPackage.addProperty("contact", this.getContact());
+        }
+        if (this.getDescription() != null) {
+            yangPackage.addProperty("description", this.getDescription());
+        }
+        if (this.getReference() != null) {
+            yangPackage.addProperty("reference", this.getReference());
+        }
+        yangPackage.addProperty("complete", this.isComplete());
+        yangPackage.addProperty("local", this.isLocal());
+
+        if (!this.getTags().isEmpty()) {
+            JsonArray tags = new JsonArray();
+            for (String tag : this.getTags()) {
+                tags.add(tag);
+            }
+            yangPackage.add("tag", tags);
+        }
+        if (!this.getMandatoryFeatures().isEmpty()) {
+            JsonArray mandatoryFeatures = new JsonArray();
+            for (String mandatoryFeature : this.getMandatoryFeatures()) {
+                mandatoryFeatures.add(mandatoryFeature);
+            }
+            yangPackage.add("mandatory-feature", mandatoryFeatures);
+        }
+        if (!this.getIncludePackages().isEmpty()) {
+            JsonArray includePackages = new JsonArray();
+            for (PackageInfo packageInfo : this.getIncludePackages()) {
+                includePackages.add(packageInfo.serialize());
+            }
+            yangPackage.add("included-package", includePackages);
+        }
+        if (!this.getModules().isEmpty()) {
+            JsonArray modules = new JsonArray();
+            for (ModuleInfo moduleInfo : this.getModules()) {
+                modules.add(moduleInfo.serialize());
+            }
+            yangPackage.add("module", modules);
+        }
+
+        if (!this.getImportOnlyModules().isEmpty()) {
+            JsonArray importOnlyModules = new JsonArray();
+            for (ModuleInfo importOnlyModule : this.getImportOnlyModules()) {
+                importOnlyModules.add(importOnlyModule.serialize());
+            }
+            yangPackage.add("import-only-module", importOnlyModules);
+        }
+        return yangPackage;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/YangPackageGenerator.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/YangPackageGenerator.java
index a6cfbef..f300d46 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/YangPackageGenerator.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/YangPackageGenerator.java
@@ -1,154 +1,154 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangpackage;

-

-import com.google.gson.JsonElement;

-import com.google.gson.JsonParser;

-

-import java.io.File;

-import java.io.FileNotFoundException;

-import java.io.FileReader;

-import java.io.FilenameFilter;

-import java.util.List;

-import java.util.Properties;

-

-import org.onap.modeling.yangkit.compiler.YangCompiler;

-import org.onap.modeling.yangkit.compiler.YangCompilerException;

-import org.onap.modeling.yangkit.plugin.YangCompilerPlugin;

-import org.onap.modeling.yangkit.plugin.YangCompilerPluginParameter;

-import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;

-import org.yangcentral.yangkit.model.api.stmt.Include;

-import org.yangcentral.yangkit.model.api.stmt.MainModule;

-import org.yangcentral.yangkit.model.api.stmt.Module;

-import org.yangcentral.yangkit.model.api.stmt.SubModule;

-

-

-public class YangPackageGenerator implements YangCompilerPlugin {

-    @Override

-    public YangCompilerPluginParameter getParameter(Properties compilerProps, String name, String value)

-            throws YangCompilerException {

-        if (!name.equals("complete") && !name.equals("meta") && !name.equals("output")) {

-            throw new YangCompilerException("unrecognized parameter:" + name);

-        }

-        if (name.equals("complete")) {

-            YangCompilerPluginParameter pluginParameter = new YangCompilerPluginParameter() {

-                @Override

-                public String getName() {

-                    return name;

-                }

-

-                @Override

-                public Object getValue() throws YangCompilerException {

-                    return Boolean.valueOf(value);

-                }

-            };

-            return pluginParameter;

-        }

-        return YangCompilerPlugin.super.getParameter(compilerProps, name, value);

-    }

-

-    @Override

-    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,

-                    List<YangCompilerPluginParameter> parameters)

-            throws YangCompilerException {

-        String output = null;

-        for (YangCompilerPluginParameter parameter : parameters) {

-            if (parameter.getName().equals("output")) {

-                output = (String) parameter.getValue();

-            } else {

-                throw new YangCompilerException("unknown parameter:" + parameter.getName());

-            }

-        }

-        if (output == null) {

-            throw new YangCompilerException("missing mandatory parameter:output");

-        }

-

-        File yangDir = yangCompiler.getYang();

-        //search package_meta.json

-        File packageMetaFile = new File(yangDir, "package_meta.json");

-        if (!packageMetaFile.exists()) {

-            throw new YangCompilerException("missing package_meta.json in directory:" + yangDir.getAbsolutePath());

-        }

-

-        try {

-            //parse yang package meta information

-            JsonElement element = JsonParser.parseReader(new FileReader(packageMetaFile));

-            YangPackageMeta yangPackageMeta = new YangPackageMeta();

-            yangPackageMeta.deserialize(element);

-            //set meta information for yang package

-            YangPackage yangPackage = new YangPackage(yangPackageMeta.getName(), yangPackageMeta.getRevision());

-            yangPackage.setOrganization(yangPackageMeta.getOrganization());

-            yangPackage.setContact(yangPackageMeta.getContact());

-            yangPackage.setDescription(yangPackageMeta.getDescription());

-            yangPackage.setReference(yangPackageMeta.getReference());

-            yangPackage.setLocal(yangPackageMeta.isLocal());

-            yangPackage.setTags(yangPackageMeta.getTags());

-            yangPackage.setMandatoryFeatures(yangPackageMeta.getMandatoryFeatures());

-            yangPackage.setIncludePackages(yangPackageMeta.getIncludePackages());

-            if (schemaContext.getImportOnlyModules().isEmpty()) {

-                yangPackage.setComplete(true);

-            }

-            FilenameFilter packageMetaFilter = new FilenameFilter() {

-                @Override

-                public boolean accept(File dir, String name) {

-                    if (name.equals("package_meta.json")) {

-                        return true;

-                    }

-                    return false;

-                }

-            };

-            File[] metaFiles = yangDir.listFiles(packageMetaFilter);

-            List<Module> modules = schemaContext.getModules();

-            for (Module module : modules) {

-                if (module instanceof MainModule) {

-                    ModuleInfo moduleInfo = new ModuleInfo(module.getArgStr(), module.getCurRevisionDate().get());

-                    moduleInfo.setNamespace(((MainModule) module).getNamespace().getUri());

-                    if (!module.getIncludes().isEmpty()) {

-                        for (Include include : module.getIncludes()) {

-                            SubModule subModule = include.getInclude().get();

-                            SubModuleInfo subModuleInfo =

-                                    new SubModuleInfo(subModule.getArgStr(), subModule.getCurRevisionDate().get());

-                            moduleInfo.addSubModule(subModuleInfo);

-                        }

-                    }

-                    yangPackage.addModule(moduleInfo);

-                }

-            }

-            for (Module importOnlyModule : schemaContext.getImportOnlyModules()) {

-                if (!(importOnlyModule instanceof MainModule)) {

-                    continue;

-                }

-                ModuleInfo moduleInfo =

-                        new ModuleInfo(importOnlyModule.getArgStr(), importOnlyModule.getCurRevisionDate().get());

-                moduleInfo.setNamespace(((MainModule) importOnlyModule).getNamespace().getUri());

-                if (!importOnlyModule.getIncludes().isEmpty()) {

-                    for (Include include : importOnlyModule.getIncludes()) {

-                        SubModule subModule = include.getInclude().get();

-                        SubModuleInfo subModuleInfo =

-                                new SubModuleInfo(subModule.getArgStr(), subModule.getCurRevisionDate().get());

-                        moduleInfo.addSubModule(subModuleInfo);

-                    }

-                }

-                yangPackage.addImportOnlyModule(moduleInfo);

-            }

-

-        } catch (FileNotFoundException e) {

-            e.printStackTrace();

-        }

-

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangpackage;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParser;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.FilenameFilter;
+import java.util.List;
+
+
+import org.onap.modeling.yangkit.compiler.YangCompiler;
+import org.onap.modeling.yangkit.compiler.YangCompilerException;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPlugin;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPluginParameter;
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+import org.yangcentral.yangkit.model.api.stmt.Include;
+import org.yangcentral.yangkit.model.api.stmt.MainModule;
+import org.yangcentral.yangkit.model.api.stmt.Module;
+import org.yangcentral.yangkit.model.api.stmt.SubModule;
+
+
+public class YangPackageGenerator implements YangCompilerPlugin {
+    @Override
+    public YangCompilerPluginParameter getParameter(String name, JsonElement value)
+            throws YangCompilerException {
+        if (!name.equals("complete") && !name.equals("meta") && !name.equals("output")) {
+            throw new YangCompilerException("unrecognized parameter:" + name);
+        }
+        if (name.equals("complete")) {
+            YangCompilerPluginParameter pluginParameter = new YangCompilerPluginParameter() {
+                @Override
+                public String getName() {
+                    return name;
+                }
+
+                @Override
+                public Object getValue() throws YangCompilerException {
+                    return value.getAsBoolean();
+                }
+            };
+            return pluginParameter;
+        }
+        return YangCompilerPlugin.super.getParameter(name, value);
+    }
+
+    @Override
+    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,
+                    List<YangCompilerPluginParameter> parameters)
+            throws YangCompilerException {
+        String output = null;
+        for (YangCompilerPluginParameter parameter : parameters) {
+            if (parameter.getName().equals("output")) {
+                output = (String) parameter.getValue();
+            } else {
+                throw new YangCompilerException("unknown parameter:" + parameter.getName());
+            }
+        }
+        if (output == null) {
+            throw new YangCompilerException("missing mandatory parameter:output");
+        }
+
+
+        //search package_meta.json
+        File packageMetaFile = new File("package_meta.json");
+        if (!packageMetaFile.exists()) {
+            throw new YangCompilerException("missing package_meta.json.");
+        }
+
+        try {
+            //parse yang package meta information
+            JsonElement element = JsonParser.parseReader(new FileReader(packageMetaFile));
+            YangPackageMeta yangPackageMeta = new YangPackageMeta();
+            yangPackageMeta.deserialize(element);
+            //set meta information for yang package
+            YangPackage yangPackage = new YangPackage(yangPackageMeta.getName(), yangPackageMeta.getRevision());
+            yangPackage.setOrganization(yangPackageMeta.getOrganization());
+            yangPackage.setContact(yangPackageMeta.getContact());
+            yangPackage.setDescription(yangPackageMeta.getDescription());
+            yangPackage.setReference(yangPackageMeta.getReference());
+            yangPackage.setLocal(yangPackageMeta.isLocal());
+            yangPackage.setTags(yangPackageMeta.getTags());
+            yangPackage.setMandatoryFeatures(yangPackageMeta.getMandatoryFeatures());
+            yangPackage.setIncludePackages(yangPackageMeta.getIncludePackages());
+            if (schemaContext.getImportOnlyModules().isEmpty()) {
+                yangPackage.setComplete(true);
+            }
+            FilenameFilter packageMetaFilter = new FilenameFilter() {
+                @Override
+                public boolean accept(File dir, String name) {
+                    if (name.equals("package_meta.json")) {
+                        return true;
+                    }
+                    return false;
+                }
+            };
+
+            List<Module> modules = schemaContext.getModules();
+            for (Module module : modules) {
+                if (module instanceof MainModule) {
+                    ModuleInfo moduleInfo = new ModuleInfo(module.getArgStr(), module.getCurRevisionDate().get());
+                    moduleInfo.setNamespace(((MainModule) module).getNamespace().getUri());
+                    if (!module.getIncludes().isEmpty()) {
+                        for (Include include : module.getIncludes()) {
+                            SubModule subModule = include.getInclude().get();
+                            SubModuleInfo subModuleInfo =
+                                    new SubModuleInfo(subModule.getArgStr(), subModule.getCurRevisionDate().get());
+                            moduleInfo.addSubModule(subModuleInfo);
+                        }
+                    }
+                    yangPackage.addModule(moduleInfo);
+                }
+            }
+            for (Module importOnlyModule : schemaContext.getImportOnlyModules()) {
+                if (!(importOnlyModule instanceof MainModule)) {
+                    continue;
+                }
+                ModuleInfo moduleInfo =
+                        new ModuleInfo(importOnlyModule.getArgStr(), importOnlyModule.getCurRevisionDate().get());
+                moduleInfo.setNamespace(((MainModule) importOnlyModule).getNamespace().getUri());
+                if (!importOnlyModule.getIncludes().isEmpty()) {
+                    for (Include include : importOnlyModule.getIncludes()) {
+                        SubModule subModule = include.getInclude().get();
+                        SubModuleInfo subModuleInfo =
+                                new SubModuleInfo(subModule.getArgStr(), subModule.getCurRevisionDate().get());
+                        moduleInfo.addSubModule(subModuleInfo);
+                    }
+                }
+                yangPackage.addImportOnlyModule(moduleInfo);
+            }
+
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        }
+
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/YangPackageMeta.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/YangPackageMeta.java
index 40da4ba..92946cf 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangpackage/YangPackageMeta.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangpackage/YangPackageMeta.java
@@ -1,187 +1,187 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangpackage;

-

-import com.google.gson.JsonArray;

-import com.google.gson.JsonElement;

-import com.google.gson.JsonObject;

-

-import java.util.ArrayList;

-import java.util.List;

-

-

-public class YangPackageMeta {

-    private String name;

-    private String revision;

-    private String organization;

-    private String contact;

-    private String description;

-    private String reference;

-    private boolean local;

-    private final List<String> tags = new ArrayList<>();

-    private final List<String> mandatoryFeatures = new ArrayList<>();

-    private final List<PackageInfo> includePackages = new ArrayList<>();

-

-    /**

-     * get the package name.

-     * @return name

-     */

-    public String getName() {

-        return name;

-    }

-

-    /**

-     * get revision of package.

-     * @return revision

-     */

-    public String getRevision() {

-        return revision;

-    }

-

-    /**

-     * get organization.

-     * @return organization.

-     */

-    public String getOrganization() {

-        return organization;

-    }

-

-    /**

-     * get contact.

-     * @return contact.

-     */

-    public String getContact() {

-        return contact;

-    }

-

-    /**

-     * get description.

-     * @return description.

-     */

-    public String getDescription() {

-        return description;

-    }

-

-    /**

-     * get reference.

-     * @return reference.

-     */

-    public String getReference() {

-        return reference;

-    }

-

-    /**

-     * whether the package is local.

-     * @return true or false

-     */

-    public boolean isLocal() {

-        return local;

-    }

-

-    /**

-     * get tags of package.

-     * @return list of tags.

-     */

-    public List<String> getTags() {

-        return tags;

-    }

-

-    /**

-     * get mandatory features.

-     * @return list of features/

-     */

-    public List<String> getMandatoryFeatures() {

-        return mandatoryFeatures;

-    }

-

-    /**

-     * get include packages.

-     * @return list of packages.

-     */

-    public List<PackageInfo> getIncludePackages() {

-        return includePackages;

-    }

-

-    /**

-     * deserialized package meta from json.

-     * @param metaDoc json element

-     */

-    public void deserialize(JsonElement metaDoc) {

-        JsonObject jsonObject = metaDoc.getAsJsonObject();

-        JsonElement nameElement = jsonObject.get("name");

-        if (nameElement != null) {

-            this.name = nameElement.getAsString();

-        }

-        JsonElement versionElement = jsonObject.get("version");

-        if (versionElement != null) {

-            this.revision = versionElement.getAsString();

-        }

-        JsonElement organizationElement = jsonObject.get("organization");

-        if (organizationElement != null) {

-            this.organization = organizationElement.getAsString();

-        }

-        JsonElement contactElement = jsonObject.get("contact");

-        if (contactElement != null) {

-            this.contact = contactElement.getAsString();

-        }

-        JsonElement descElement = jsonObject.get("description");

-        if (descElement != null) {

-            this.description = descElement.getAsString();

-        }

-        JsonElement referElement = jsonObject.get("reference");

-        if (referElement != null) {

-            this.reference = referElement.getAsString();

-        }

-

-        JsonElement localElement = jsonObject.get("local");

-        if (localElement != null) {

-            this.local = referElement.getAsBoolean();

-        }

-        JsonElement tagElement = jsonObject.get("tag");

-        if (tagElement != null) {

-            JsonArray tagArray = tagElement.getAsJsonArray();

-            int size = tagArray.size();

-            for (int i = 0; i < size; i++) {

-                JsonElement tagIns = tagArray.get(i);

-                this.tags.add(tagIns.getAsString());

-            }

-        }

-

-        JsonElement mandatoryFeaturesElement = jsonObject.get("mandatory-feature");

-        if (mandatoryFeaturesElement != null) {

-            JsonArray mandatoryFeaturesArray = mandatoryFeaturesElement.getAsJsonArray();

-            int size = mandatoryFeaturesArray.size();

-            for (int i = 0; i < size; i++) {

-                JsonElement featureIns = mandatoryFeaturesArray.get(i);

-                this.mandatoryFeatures.add(featureIns.getAsString());

-            }

-        }

-        JsonElement includePackagesElement = jsonObject.get("include-package");

-        if (includePackagesElement != null) {

-            JsonArray includePackageArray = includePackagesElement.getAsJsonArray();

-            int size = includePackageArray.size();

-            for (int i = 0; i < size; i++) {

-                JsonElement includePackageIns = includePackageArray.get(i);

-                JsonObject includePackageObj = includePackageIns.getAsJsonObject();

-                PackageInfo packageInfo = new PackageInfo(includePackageObj.get("name").getAsString(),

-                        includePackageObj.get("version").getAsString());

-                this.includePackages.add(packageInfo);

-            }

-        }

-

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangpackage;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class YangPackageMeta {
+    private String name;
+    private String revision;
+    private String organization;
+    private String contact;
+    private String description;
+    private String reference;
+    private boolean local;
+    private final List<String> tags = new ArrayList<>();
+    private final List<String> mandatoryFeatures = new ArrayList<>();
+    private final List<PackageInfo> includePackages = new ArrayList<>();
+
+    /**
+     * get the package name.
+     * @return name
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * get revision of package.
+     * @return revision
+     */
+    public String getRevision() {
+        return revision;
+    }
+
+    /**
+     * get organization.
+     * @return organization.
+     */
+    public String getOrganization() {
+        return organization;
+    }
+
+    /**
+     * get contact.
+     * @return contact.
+     */
+    public String getContact() {
+        return contact;
+    }
+
+    /**
+     * get description.
+     * @return description.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * get reference.
+     * @return reference.
+     */
+    public String getReference() {
+        return reference;
+    }
+
+    /**
+     * whether the package is local.
+     * @return true or false
+     */
+    public boolean isLocal() {
+        return local;
+    }
+
+    /**
+     * get tags of package.
+     * @return list of tags.
+     */
+    public List<String> getTags() {
+        return tags;
+    }
+
+    /**
+     * get mandatory features.
+     * @return list of features/
+     */
+    public List<String> getMandatoryFeatures() {
+        return mandatoryFeatures;
+    }
+
+    /**
+     * get include packages.
+     * @return list of packages.
+     */
+    public List<PackageInfo> getIncludePackages() {
+        return includePackages;
+    }
+
+    /**
+     * deserialized package meta from json.
+     * @param metaDoc json element
+     */
+    public void deserialize(JsonElement metaDoc) {
+        JsonObject jsonObject = metaDoc.getAsJsonObject();
+        JsonElement nameElement = jsonObject.get("name");
+        if (nameElement != null) {
+            this.name = nameElement.getAsString();
+        }
+        JsonElement versionElement = jsonObject.get("version");
+        if (versionElement != null) {
+            this.revision = versionElement.getAsString();
+        }
+        JsonElement organizationElement = jsonObject.get("organization");
+        if (organizationElement != null) {
+            this.organization = organizationElement.getAsString();
+        }
+        JsonElement contactElement = jsonObject.get("contact");
+        if (contactElement != null) {
+            this.contact = contactElement.getAsString();
+        }
+        JsonElement descElement = jsonObject.get("description");
+        if (descElement != null) {
+            this.description = descElement.getAsString();
+        }
+        JsonElement referElement = jsonObject.get("reference");
+        if (referElement != null) {
+            this.reference = referElement.getAsString();
+        }
+
+        JsonElement localElement = jsonObject.get("local");
+        if (localElement != null) {
+            this.local = referElement.getAsBoolean();
+        }
+        JsonElement tagElement = jsonObject.get("tag");
+        if (tagElement != null) {
+            JsonArray tagArray = tagElement.getAsJsonArray();
+            int size = tagArray.size();
+            for (int i = 0; i < size; i++) {
+                JsonElement tagIns = tagArray.get(i);
+                this.tags.add(tagIns.getAsString());
+            }
+        }
+
+        JsonElement mandatoryFeaturesElement = jsonObject.get("mandatory-feature");
+        if (mandatoryFeaturesElement != null) {
+            JsonArray mandatoryFeaturesArray = mandatoryFeaturesElement.getAsJsonArray();
+            int size = mandatoryFeaturesArray.size();
+            for (int i = 0; i < size; i++) {
+                JsonElement featureIns = mandatoryFeaturesArray.get(i);
+                this.mandatoryFeatures.add(featureIns.getAsString());
+            }
+        }
+        JsonElement includePackagesElement = jsonObject.get("include-package");
+        if (includePackagesElement != null) {
+            JsonArray includePackageArray = includePackagesElement.getAsJsonArray();
+            int size = includePackageArray.size();
+            for (int i = 0; i < size; i++) {
+                JsonElement includePackageIns = includePackageArray.get(i);
+                JsonObject includePackageObj = includePackageIns.getAsJsonObject();
+                PackageInfo packageInfo = new PackageInfo(includePackageObj.get("name").getAsString(),
+                        includePackageObj.get("version").getAsString());
+                this.includePackages.add(packageInfo);
+            }
+        }
+
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangtree/GroupingSchemaNodeContainer.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangtree/GroupingSchemaNodeContainer.java
index 67fd48d..2b8ba23 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangtree/GroupingSchemaNodeContainer.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangtree/GroupingSchemaNodeContainer.java
@@ -1,141 +1,151 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangtree;

-

-import java.util.ArrayList;

-import java.util.List;

-

-import org.yangcentral.yangkit.common.api.QName;

-import org.yangcentral.yangkit.common.api.validate.ValidatorResult;

-import org.yangcentral.yangkit.model.api.stmt.Action;

-import org.yangcentral.yangkit.model.api.stmt.ActionContainer;

-import org.yangcentral.yangkit.model.api.stmt.Augment;

-import org.yangcentral.yangkit.model.api.stmt.DataDefContainer;

-import org.yangcentral.yangkit.model.api.stmt.DataDefinition;

-import org.yangcentral.yangkit.model.api.stmt.DataNode;

-import org.yangcentral.yangkit.model.api.stmt.Grouping;

-import org.yangcentral.yangkit.model.api.stmt.GroupingDefContainer;

-import org.yangcentral.yangkit.model.api.stmt.Notification;

-import org.yangcentral.yangkit.model.api.stmt.NotificationContainer;

-import org.yangcentral.yangkit.model.api.stmt.SchemaNode;

-import org.yangcentral.yangkit.model.api.stmt.SchemaNodeContainer;

-import org.yangcentral.yangkit.model.api.stmt.Uses;

-import org.yangcentral.yangkit.model.api.stmt.YangStatement;

-

-

-public class GroupingSchemaNodeContainer implements SchemaNodeContainer, GroupingDefContainer {

-

-    private final YangStatement container;

-

-    /**

-     * constructor.

-     * @param container schema node container

-     */

-    public GroupingSchemaNodeContainer(YangStatement container) {

-        this.container = container;

-    }

-

-    @Override

-    public List<Grouping> getGroupings() {

-        List<Grouping> groupings = new ArrayList<>();

-        if (container instanceof GroupingDefContainer) {

-            groupings.addAll(((GroupingDefContainer) container).getGroupings());

-        }

-        return groupings;

-    }

-

-    @Override

-    public Grouping getGrouping(String name) {

-        return null;

-    }

-

-    @Override

-    public List<SchemaNode> getSchemaNodeChildren() {

-        List<SchemaNode> schemaNodes = new ArrayList<>();

-        if (container instanceof DataDefContainer) {

-            DataDefContainer dataDefContainer = (DataDefContainer) container;

-            for (DataDefinition dataDefinition : dataDefContainer.getDataDefChildren()) {

-                schemaNodes.add(dataDefinition);

-            }

-        }

-

-        if (container instanceof ActionContainer) {

-            ActionContainer actionContainer = (ActionContainer) container;

-            for (Action action : actionContainer.getActions()) {

-                schemaNodes.add(action);

-            }

-        }

-

-        if (container instanceof NotificationContainer) {

-            for (Notification notification : ((NotificationContainer) container).getNotifications()) {

-                schemaNodes.add(notification);

-            }

-        }

-        if (container instanceof Uses) {

-            for (Augment augment : ((Uses) container).getAugments()) {

-                schemaNodes.add(augment);

-            }

-        }

-

-        return schemaNodes;

-    }

-

-    @Override

-    public ValidatorResult addSchemaNodeChild(SchemaNode schemaNode) {

-        return null;

-    }

-

-    @Override

-    public ValidatorResult addSchemaNodeChildren(List<SchemaNode> schemaNodes) {

-        return null;

-    }

-

-    @Override

-    public SchemaNode getSchemaNodeChild(QName identifier) {

-        return null;

-    }

-

-    @Override

-    public DataNode getDataNodeChild(QName identifier) {

-        return null;

-    }

-

-    @Override

-    public List<DataNode> getDataNodeChildren() {

-        return null;

-    }

-

-    @Override

-    public List<SchemaNode> getEffectiveSchemaNodeChildren(boolean ignoreNamespace) {

-        return null;

-    }

-

-    @Override

-    public void removeSchemaNodeChild(QName identifier) {

-

-    }

-

-    @Override

-    public void removeSchemaNodeChild(SchemaNode schemaNode) {

-

-    }

-

-    @Override

-    public SchemaNode getMandatoryDescendant() {

-        return null;

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangtree;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.yangcentral.yangkit.common.api.QName;
+import org.yangcentral.yangkit.common.api.validate.ValidatorResult;
+import org.yangcentral.yangkit.model.api.stmt.Action;
+import org.yangcentral.yangkit.model.api.stmt.ActionContainer;
+import org.yangcentral.yangkit.model.api.stmt.Augment;
+import org.yangcentral.yangkit.model.api.stmt.DataDefContainer;
+import org.yangcentral.yangkit.model.api.stmt.DataDefinition;
+import org.yangcentral.yangkit.model.api.stmt.DataNode;
+import org.yangcentral.yangkit.model.api.stmt.Grouping;
+import org.yangcentral.yangkit.model.api.stmt.GroupingDefContainer;
+import org.yangcentral.yangkit.model.api.stmt.Notification;
+import org.yangcentral.yangkit.model.api.stmt.NotificationContainer;
+import org.yangcentral.yangkit.model.api.stmt.SchemaNode;
+import org.yangcentral.yangkit.model.api.stmt.SchemaNodeContainer;
+import org.yangcentral.yangkit.model.api.stmt.Uses;
+import org.yangcentral.yangkit.model.api.stmt.YangStatement;
+
+
+public class GroupingSchemaNodeContainer implements SchemaNodeContainer, GroupingDefContainer {
+
+    private final YangStatement container;
+
+    /**
+     * constructor.
+     * @param container schema node container
+     */
+    public GroupingSchemaNodeContainer(YangStatement container) {
+        this.container = container;
+    }
+
+    @Override
+    public List<Grouping> getGroupings() {
+        List<Grouping> groupings = new ArrayList<>();
+        if (container instanceof GroupingDefContainer) {
+            groupings.addAll(((GroupingDefContainer) container).getGroupings());
+        }
+        return groupings;
+    }
+
+    @Override
+    public Grouping getGrouping(String name) {
+        return null;
+    }
+
+    @Override
+    public List<SchemaNode> getSchemaNodeChildren() {
+        List<SchemaNode> schemaNodes = new ArrayList<>();
+        if (container instanceof DataDefContainer) {
+            DataDefContainer dataDefContainer = (DataDefContainer) container;
+            for (DataDefinition dataDefinition : dataDefContainer.getDataDefChildren()) {
+                schemaNodes.add(dataDefinition);
+            }
+        }
+
+        if (container instanceof ActionContainer) {
+            ActionContainer actionContainer = (ActionContainer) container;
+            for (Action action : actionContainer.getActions()) {
+                schemaNodes.add(action);
+            }
+        }
+
+        if (container instanceof NotificationContainer) {
+            for (Notification notification : ((NotificationContainer) container).getNotifications()) {
+                schemaNodes.add(notification);
+            }
+        }
+        if (container instanceof Uses) {
+            for (Augment augment : ((Uses) container).getAugments()) {
+                schemaNodes.add(augment);
+            }
+        }
+
+        return schemaNodes;
+    }
+
+    @Override
+    public ValidatorResult addSchemaNodeChild(SchemaNode schemaNode) {
+        return null;
+    }
+
+    @Override
+    public ValidatorResult addSchemaNodeChildren(List<SchemaNode> schemaNodes) {
+        return null;
+    }
+
+    @Override
+    public SchemaNode getSchemaNodeChild(QName identifier) {
+        return null;
+    }
+
+    @Override
+    public DataNode getDataNodeChild(QName identifier) {
+        return null;
+    }
+
+    @Override
+    public List<DataNode> getDataNodeChildren() {
+        return null;
+    }
+
+    @Override
+    public List<SchemaNode> getTreeNodeChildren() {
+        return null;
+    }
+
+    @Override
+    public SchemaNode getTreeNodeChild(QName identifier) {
+        return null;
+    }
+
+    @Override
+    public List<SchemaNode> getEffectiveSchemaNodeChildren(boolean ignoreNamespace) {
+        return null;
+    }
+
+    @Override
+    public void removeSchemaNodeChild(QName identifier) {
+
+    }
+
+    @Override
+    public void removeSchemaNodeChild(SchemaNode schemaNode) {
+
+    }
+
+    @Override
+    public SchemaNode getMandatoryDescendant() {
+        return null;
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangtree/YangTreeGenerator.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangtree/YangTreeGenerator.java
index 45f7b94..b5b5643 100644
--- a/yang-compiler/src/main/java/org/onap/modeling/yangkit/plugin/yangtree/YangTreeGenerator.java
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/plugin/yangtree/YangTreeGenerator.java
@@ -1,654 +1,655 @@
-/*

-Copyright 2023 Huawei Technologies

-

-Licensed under the Apache License, Version 2.0 (the "License");

-you may not use this file except in compliance with the License.

-You may obtain a copy of the License at

-

-    http://www.apache.org/licenses/LICENSE-2.0

-

-Unless required by applicable law or agreed to in writing, software

-distributed under the License is distributed on an "AS IS" BASIS,

-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-See the License for the specific language governing permissions and

-limitations under the License.

-*/

-

-package org.onap.modeling.yangkit.plugin.yangtree;

-

-import java.io.File;

-import java.util.ArrayList;

-import java.util.List;

-import java.util.Properties;

-

-import org.onap.modeling.yangkit.compiler.YangCompiler;

-import org.onap.modeling.yangkit.compiler.YangCompilerException;

-import org.onap.modeling.yangkit.plugin.YangCompilerPlugin;

-import org.onap.modeling.yangkit.plugin.YangCompilerPluginParameter;

-import org.yangcentral.yangkit.common.api.QName;

-import org.yangcentral.yangkit.model.api.restriction.LeafRef;

-import org.yangcentral.yangkit.model.api.schema.SchemaTreeType;

-import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;

-

-import org.yangcentral.yangkit.model.api.stmt.Action;

-import org.yangcentral.yangkit.model.api.stmt.Anydata;

-import org.yangcentral.yangkit.model.api.stmt.Anyxml;

-import org.yangcentral.yangkit.model.api.stmt.Augment;

-import org.yangcentral.yangkit.model.api.stmt.Case;

-import org.yangcentral.yangkit.model.api.stmt.Choice;

-import org.yangcentral.yangkit.model.api.stmt.Container;

-import org.yangcentral.yangkit.model.api.stmt.DataDefinition;

-import org.yangcentral.yangkit.model.api.stmt.Entity;

-import org.yangcentral.yangkit.model.api.stmt.Grouping;

-import org.yangcentral.yangkit.model.api.stmt.GroupingDefContainer;

-import org.yangcentral.yangkit.model.api.stmt.IfFeature;

-import org.yangcentral.yangkit.model.api.stmt.IfFeatureSupport;

-import org.yangcentral.yangkit.model.api.stmt.Leaf;

-import org.yangcentral.yangkit.model.api.stmt.MainModule;

-import org.yangcentral.yangkit.model.api.stmt.Module;

-import org.yangcentral.yangkit.model.api.stmt.MultiInstancesDataNode;

-import org.yangcentral.yangkit.model.api.stmt.Notification;

-import org.yangcentral.yangkit.model.api.stmt.Rpc;

-import org.yangcentral.yangkit.model.api.stmt.SchemaDataNode;

-import org.yangcentral.yangkit.model.api.stmt.SchemaNode;

-import org.yangcentral.yangkit.model.api.stmt.SchemaNodeContainer;

-import org.yangcentral.yangkit.model.api.stmt.Status;

-import org.yangcentral.yangkit.model.api.stmt.TypedDataNode;

-import org.yangcentral.yangkit.model.api.stmt.Uses;

-import org.yangcentral.yangkit.model.api.stmt.YangList;

-import org.yangcentral.yangkit.model.api.stmt.YangStatement;

-import org.yangcentral.yangkit.model.api.stmt.YangUnknown;

-import org.yangcentral.yangkit.model.api.stmt.ext.AugmentStructure;

-import org.yangcentral.yangkit.model.api.stmt.ext.YangData;

-import org.yangcentral.yangkit.model.api.stmt.ext.YangDataStructure;

-import org.yangcentral.yangkit.utils.file.FileUtil;

-

-

-public class YangTreeGenerator implements YangCompilerPlugin {

-    private int lineLength = 72;

-    private boolean expandGrouping = true;

-    private String output;

-    private static final String SPACE = " ";

-    private static final String TWO_SPACES = "  ";

-    private static final String OFFSET = "   ";

-    private static final String VERTICAL_OFFSET = "|  ";

-

-    /**

-     * build yang tree from module.

-     * @param module module

-     * @return yang tree string

-     */

-    public String buildYangTree(Module module) {

-        StringBuilder sb = new StringBuilder();

-        if (module instanceof MainModule) {

-            sb.append("module:");

-        } else {

-            sb.append("submodule:");

-        }

-        sb.append(SPACE);

-        sb.append(module.getArgStr());

-        sb.append("\n");

-        //data nodes

-        List<DataDefinition> dataDefs = module.getDataDefChildren();

-

-        //augments

-        List<Augment> augments = module.getAugments();

-

-

-        List<YangUnknown> yangDataList = module.getUnknowns(

-                new QName("urn:ietf:params:xml:ns:yang:ietf-restconf", "yang-data"));

-

-        // yang structure extension

-        List<YangUnknown> yangStructureList = module.getUnknowns(YangDataStructure.YANG_KEYWORD);

-

-        // augment structure extension

-        List<YangUnknown> augmentStructureList = module.getUnknowns(AugmentStructure.YANG_KEYWORD);

-

-        if (!module.getGroupings().isEmpty()

-                && (!expandGrouping

-                || (module.getDataDefChildren().isEmpty()

-                && module.getRpcs().isEmpty()

-                && module.getNotifications().isEmpty()

-                && module.getAugments().isEmpty()

-                && yangDataList.isEmpty()

-                && yangStructureList.isEmpty()

-                && augmentStructureList.isEmpty()))) {

-            sb.append(buildGroupingContainer(module, TWO_SPACES));

-        }

-        //data nodes

-        if (!dataDefs.isEmpty()) {

-            int size = dataDefs.size();

-            boolean last = false;

-            for (int i = 0; i < size; i++) {

-                if (i == (size - 1)) {

-                    last = true;

-                }

-                DataDefinition dataDefinition = dataDefs.get(i);

-                sb.append(buildYangTree(dataDefinition, last, TWO_SPACES, !expandGrouping));

-            }

-        }

-        //augments

-        if (!augments.isEmpty()) {

-            for (Augment augment : augments) {

-                sb.append(buildAugmentRepresentation(augment, TWO_SPACES));

-                sb.append(buildChildren(augment, TWO_SPACES + TWO_SPACES, !expandGrouping));

-            }

-        }

-        //rpcs

-        List<Rpc> rpcs = module.getRpcs();

-        if (!rpcs.isEmpty()) {

-            sb.append(TWO_SPACES);

-            sb.append("rpcs:\n");

-            int size = rpcs.size();

-            boolean last = false;

-            for (int i = 0; i < size; i++) {

-                if (i == (size - 1)) {

-                    last = true;

-                }

-                Rpc rpc = rpcs.get(i);

-                sb.append(buildYangTree(rpc, last, TWO_SPACES + TWO_SPACES, !expandGrouping));

-            }

-        }

-        //notifications

-        List<Notification> notifications = module.getNotifications();

-        if (!notifications.isEmpty()) {

-            sb.append(TWO_SPACES);

-            sb.append("notifications:\n");

-            int size = notifications.size();

-            boolean last = false;

-            for (int i = 0; i < size; i++) {

-                if (i == (size - 1)) {

-                    last = true;

-                }

-                Notification notification = notifications.get(i);

-                sb.append(buildYangTree(notification, last, TWO_SPACES + TWO_SPACES, !expandGrouping));

-            }

-        }

-        //yang data

-        if (!yangDataList.isEmpty()) {

-            for (YangUnknown unknown : yangDataList) {

-                YangData yangData = (YangData) unknown;

-                sb.append(TWO_SPACES);

-                sb.append("yang-data");

-                sb.append(" ");

-                sb.append(yangData.getArgStr());

-                sb.append(":\n");

-                sb.append(buildChildren(yangData, TWO_SPACES + TWO_SPACES, !expandGrouping));

-            }

-        }

-        //structures

-        if (!yangStructureList.isEmpty()) {

-            for (YangUnknown unknown : yangStructureList) {

-                YangDataStructure structure = (YangDataStructure) unknown;

-                sb.append(TWO_SPACES);

-                sb.append("structure");

-                sb.append(" ");

-                sb.append(structure.getArgStr());

-                sb.append(":\n");

-                if (!expandGrouping) {

-                    sb.append(buildGroupingContainer(structure, TWO_SPACES + TWO_SPACES));

-                }

-                sb.append(buildChildren(structure, TWO_SPACES + TWO_SPACES, !expandGrouping));

-

-            }

-        }

-        //augment-structures

-        if (!augmentStructureList.isEmpty()) {

-            for (YangUnknown unknown : augmentStructureList) {

-                AugmentStructure augmentStructure = (AugmentStructure) unknown;

-                sb.append(TWO_SPACES);

-                sb.append("augment-structure");

-                sb.append(" ");

-                sb.append(augmentStructure.getArgStr());

-                sb.append(":\n");

-                sb.append(buildChildren(augmentStructure, TWO_SPACES + TWO_SPACES, !expandGrouping));

-            }

-        }

-

-        return sb.toString();

-    }

-

-    private String buildYangTree(SchemaNode schemaNode, boolean last, String offSet, boolean grouping) {

-        StringBuilder sb = new StringBuilder();

-        if (!grouping && (schemaNode instanceof Uses)) {

-            Uses uses = (Uses) schemaNode;

-            List<SchemaNode> schemaNodes = uses.getSchemaNodeChildren();

-            for (int i = 0; i < schemaNodes.size(); i++) {

-                SchemaNode exSchemaNode = schemaNodes.get(i);

-                boolean subLast = last;

-                if (i != (schemaNodes.size() - 1)) {

-                    subLast = false;

-                }

-                sb.append(buildYangTree(exSchemaNode, subLast, offSet, grouping));

-            }

-            return sb.toString();

-        }

-        if (schemaNode instanceof Augment) {

-            sb.append(buildAugmentRepresentation((Augment) schemaNode, offSet));

-        } else {

-            sb.append(buildNodeRepresentation(schemaNode, offSet));

-        }

-        if ((schemaNode instanceof GroupingDefContainer) && grouping) {

-            sb.append(buildGroupingContainer((GroupingDefContainer) schemaNode, offSet + TWO_SPACES));

-        }

-        if (schemaNode instanceof SchemaNodeContainer) {

-            String childOffSet = offSet;

-            if (schemaNode instanceof Augment) {

-                childOffSet = childOffSet.concat(TWO_SPACES);

-            } else {

-                if (last) {

-                    childOffSet = childOffSet.concat(OFFSET);

-                } else {

-                    childOffSet = childOffSet.concat(VERTICAL_OFFSET);

-                }

-            }

-

-            SchemaNodeContainer schemaNodeContainer;

-            if (!grouping) {

-                schemaNodeContainer = (SchemaNodeContainer) schemaNode;

-            } else {

-                schemaNodeContainer = new GroupingSchemaNodeContainer(schemaNode);

-            }

-

-            sb.append(buildChildren(schemaNodeContainer, childOffSet, grouping));

-        }

-

-        return sb.toString();

-    }

-

-    private String buildGroupingContainer(GroupingDefContainer groupingDefContainer, String offSet) {

-        StringBuilder sb = new StringBuilder();

-        //sb.append(offSet);

-        List<Grouping> groupings = groupingDefContainer.getGroupings();

-        int size = groupings.size();

-        for (int i = 0; i < size; i++) {

-            boolean last = false;

-            if (i == (size - 1)) {

-                last = true;

-            }

-            Grouping grouping = groupings.get(i);

-            sb.append(buildGrouping(grouping, last, offSet));

-        }

-        return sb.toString();

-    }

-

-    private List<SchemaNode> getRealSchemaChildren(SchemaNodeContainer schemaNodeContainer, boolean grouping) {

-        List<SchemaNode> realSchemaNodeChildren = new ArrayList<>();

-

-        for (SchemaNode schemaChild : schemaNodeContainer.getSchemaNodeChildren()) {

-            if (schemaChild instanceof Augment) {

-                Augment augment = (Augment) schemaChild;

-                if (schemaNodeContainer instanceof SchemaNode) {

-                    SchemaNode schemaNodeParent = (SchemaNode) schemaNodeContainer;

-                    if (augment.getContext().getNamespace() != null && !augment.getContext().getNamespace()

-                            .equals(schemaNodeParent.getContext().getNamespace())) {

-                        continue;

-                    }

-                }

-                if (!grouping) {

-                    realSchemaNodeChildren.addAll(getRealSchemaChildren(augment, grouping));

-                    continue;

-                }

-            }

-            realSchemaNodeChildren.add(schemaChild);

-        }

-        return realSchemaNodeChildren;

-    }

-

-    private String buildChildren(SchemaNodeContainer schemaNodeContainer, String offSet, boolean grouping) {

-        StringBuilder sb = new StringBuilder();

-        List<SchemaNode> schemaNodeChildren = schemaNodeContainer.getSchemaNodeChildren();

-        List<SchemaNode> realSchemaNodeChildren = getRealSchemaChildren(schemaNodeContainer, grouping);

-

-        int size = realSchemaNodeChildren.size();

-        for (int i = 0; i < size; i++) {

-            SchemaNode realSchemaNode = realSchemaNodeChildren.get(i);

-            boolean subLast = false;

-            if (i == (size - 1)) {

-                subLast = true;

-            }

-            sb.append(buildYangTree(realSchemaNode, subLast, offSet, grouping));

-

-        }

-        return sb.toString();

-    }

-

-    private String buildGrouping(Grouping grouping, boolean last, String offset) {

-        StringBuilder sb = new StringBuilder();

-        sb.append(offset);

-        sb.append("grouping ");

-        sb.append(grouping.getArgStr());

-        sb.append(":\n");

-        GroupingSchemaNodeContainer groupingSchemaNodeContainer = new GroupingSchemaNodeContainer(grouping);

-        sb.append(buildGroupingContainer(grouping, offset + TWO_SPACES));

-        sb.append(buildChildren(groupingSchemaNodeContainer, offset + TWO_SPACES, true));

-        return sb.toString();

-    }

-

-

-

-    private String getStatus(YangStatement yangStatement) {

-        if (yangStatement instanceof Entity) {

-            Status status = ((Entity) yangStatement).getEffectiveStatus();

-            switch (status) {

-                case CURRENT: {

-                    return "+";

-                }

-                case DEPRECATED: {

-                    return "x";

-                }

-                case OBSOLETE: {

-                    return "o";

-                }

-                default:

-                    throw new IllegalStateException("Unexpected value: " + status);

-            }

-        }

-        return "";

-    }

-

-    private String getFlags(YangStatement yangStatement) {

-        String flags = "";

-        if (yangStatement instanceof SchemaNode) {

-            SchemaNode schemaNode = (SchemaNode) yangStatement;

-            if (schemaNode instanceof Uses) {

-                flags = "-u";

-            } else if ((schemaNode instanceof Rpc) || (schemaNode instanceof Action)) {

-                flags = "-x";

-            } else if (schemaNode instanceof Notification) {

-                flags = "-n";

-            } else if (schemaNode instanceof Case) {

-                flags = "";

-            } else if (schemaNode.isConfig()) {

-                flags = "rw";

-            } else {

-                flags = "ro";

-                if (schemaNode.getSchemaTreeType() == SchemaTreeType.INPUTTREE) {

-                    flags = "-w";

-                }

-            }

-

-            if (!schemaNode.getSubStatement(new QName("urn:ietf:params:xml:ns:yang:ietf-yang-schema-mount",

-                    "mount-point")).isEmpty()) {

-                flags = "mp";

-            }

-        } else if (yangStatement instanceof Grouping) {

-            flags = "rw";

-        }

-

-        return flags;

-    }

-

-    private String getNodeName(YangStatement yangStatement) {

-        if (yangStatement instanceof Case) {

-            return ":(" + yangStatement.getArgStr() + ")";

-        } else if (yangStatement instanceof Choice) {

-            return " (" + yangStatement.getArgStr() + ")";

-        } else {

-            return " " + yangStatement.getArgStr();

-        }

-    }

-

-    private boolean isMandatory(SchemaDataNode dataNode) {

-        //key nodes

-        if (dataNode instanceof Leaf) {

-            SchemaNodeContainer parent = dataNode.getClosestAncestorNode();

-            if (parent instanceof YangList) {

-                YangList list = (YangList) parent;

-                if (list.getKey().getKeyNode(dataNode.getIdentifier()) != null) {

-                    return true;

-                }

-            }

-        }

-        return dataNode.isMandatory();

-    }

-

-    private String getOpts(YangStatement yangStatement) {

-        if ((yangStatement instanceof Leaf)

-                || (yangStatement instanceof Choice)

-                || (yangStatement instanceof Anydata)

-                || (yangStatement instanceof Anyxml)) {

-            if (!isMandatory((SchemaDataNode) yangStatement)) {

-                return "?";

-            }

-        } else if (yangStatement instanceof Container) {

-            if (((Container) yangStatement).isPresence()) {

-                return "!";

-            }

-        } else if (yangStatement instanceof MultiInstancesDataNode) {

-            StringBuilder sb = new StringBuilder("*");

-            if (yangStatement instanceof YangList) {

-                YangList yangList = (YangList) yangStatement;

-                if (yangList.getKey() != null) {

-                    sb.append(" [");

-                    sb.append(yangList.getKey().getArgStr());

-                    sb.append("]");

-                }

-            }

-            return sb.toString();

-        }

-        return "";

-    }

-

-    private String getType(TypedDataNode typedDataNode) {

-        if (typedDataNode.getType().getRestriction() instanceof LeafRef) {

-            LeafRef leafRef = (LeafRef) typedDataNode.getType().getRestriction();

-            return "-> " + leafRef.getEffectivePath().getArgStr();

-        } else {

-            return typedDataNode.getType().getArgStr();

-        }

-    }

-

-    private String getFeatures(IfFeatureSupport ifFeatureSupport) {

-        StringBuilder sb = new StringBuilder();

-        List<IfFeature> ifFeatures = ifFeatureSupport.getIfFeatures();

-        if (!ifFeatures.isEmpty()) {

-            sb.append(" {");

-            int size = ifFeatures.size();

-            for (int i = 0; i < size; i++) {

-                IfFeature ifFeature = ifFeatures.get(i);

-                sb.append(ifFeature.getArgStr());

-                if (i != (size - 1)) {

-                    sb.append(",");

-                }

-            }

-            sb.append("}?");

-        }

-        return sb.toString();

-    }

-

-    private String wrapLongPath(String offSet, String longPath) {

-        if ((offSet.length() + longPath.length()) <= lineLength) {

-            return offSet + longPath;

-        }

-        StringBuilder wrappedLine = new StringBuilder(offSet);

-        String firstCandidatePath = longPath.substring(0, lineLength - offSet.length());

-        int index = firstCandidatePath.lastIndexOf("/");

-        firstCandidatePath = firstCandidatePath.substring(0, index);

-        wrappedLine.append(firstCandidatePath);

-        wrappedLine.append("\n");

-        String nextOffSet = offSet + "  ";

-        String nextLongPath = longPath.substring(index);

-        wrappedLine.append(wrapLongPath(nextOffSet, nextLongPath));

-        return wrappedLine.toString();

-    }

-

-    /**

-     * build augmentation representation string.

-     * @param augment augment

-     * @param offSet offset

-     * @return string

-     */

-    public String buildAugmentRepresentation(Augment augment, String offSet) {

-        StringBuilder sb = new StringBuilder(offSet);

-        int beginIndex = sb.length();

-        sb.append("augment");

-        sb.append(" ");

-        int nameIndex = sb.length();

-        sb.append(augment.getArgStr());

-        sb.append(":\n");

-        if (sb.length() > lineLength) {

-            String subString = sb.substring(0, lineLength);

-            int index = subString.lastIndexOf("/");

-            StringBuilder newSb = new StringBuilder();

-            String firstLine = sb.substring(0, index);

-            newSb.append(firstLine);

-            newSb.append("\n");

-            newSb.append(offSet);

-            for (int i = beginIndex; i < (nameIndex + 2); i++) {

-                newSb.append(" ");

-            }

-            newSb.append(sb.substring(index));

-            return newSb.toString();

-        }

-        return sb.toString();

-    }

-

-    /**

-     * build a node representation from yang statement.

-     * @param yangStatement yang statement.

-     * @param offSet offset.

-     * @return string

-     */

-    public String buildNodeRepresentation(YangStatement yangStatement, String offSet) {

-        StringBuilder sb = new StringBuilder(offSet);

-        int beginIndex = sb.length();

-        //status

-        sb.append(getStatus(yangStatement)).append("--");

-        //flags

-        sb.append(getFlags(yangStatement));

-        //name

-        String name = getNodeName(yangStatement);

-        int nameIndex = sb.length();

-        if (name.startsWith(" ")) {

-            nameIndex++;

-        }

-        sb.append(name);

-        sb.append(getOpts(yangStatement));

-

-

-        if (yangStatement instanceof TypedDataNode) {

-            int typeIndex = sb.length();

-            TypedDataNode typedDataNode = (TypedDataNode) yangStatement;

-            String type = getType(typedDataNode);

-            if (type.length() + typeIndex + 1 > lineLength) {

-                //change line

-                StringBuilder newLine = new StringBuilder();

-

-                StringBuilder newOffSet = new StringBuilder(offSet);

-

-                for (int i = beginIndex; i < nameIndex + 2; i++) {

-                    newOffSet.append(" ");

-                }

-                newLine.append(newOffSet);

-                newLine.append(type);

-

-                if ((typedDataNode.getType().getRestriction() instanceof LeafRef)

-                        && (newLine.length() > lineLength)) {

-                    sb.append(" ");

-                    sb.append("leafref");

-                } else {

-                    sb.append("\n");

-                    sb.append(newLine);

-                }

-

-

-            } else {

-                sb.append(" ");

-                sb.append(type);

-            }

-        }

-

-        if (yangStatement instanceof IfFeatureSupport) {

-            IfFeatureSupport ifFeatureSupport = (IfFeatureSupport) yangStatement;

-            String features = getFeatures(ifFeatureSupport);

-            if (features.length() > 0) {

-                int ifFeatureIndex = sb.length();

-                int lastCrIndex = sb.lastIndexOf("\n");

-                if (lastCrIndex == -1) {

-                    lastCrIndex = 0;

-                }

-                if (((ifFeatureIndex - lastCrIndex) + features.length()) > lineLength) {

-                    //change line

-                    sb.append("\n");

-                    sb.append(offSet);

-                    for (int i = beginIndex; i < (nameIndex + 2); i++) {

-                        sb.append(" ");

-                    }

-                    sb.append(features);

-                } else {

-                    sb.append(" ");

-                    sb.append(features);

-                }

-            }

-

-        }

-        sb.append("\n");

-        return sb.toString();

-    }

-

-    @Override

-    public YangCompilerPluginParameter getParameter(Properties compilerProps, String name, String value)

-            throws YangCompilerException {

-        if (!name.equals("output") && !name.equals("line-length")

-                && !name.equals("expand-grouping")) {

-            throw new YangCompilerException("unrecognized parameter:" + name);

-        }

-        if (name.equals("output")) {

-            return YangCompilerPlugin.super.getParameter(compilerProps, name, value);

-        }

-        YangCompilerPluginParameter yangCompilerPluginParameter = new YangCompilerPluginParameter() {

-            @Override

-            public String getName() {

-                return name;

-            }

-

-            @Override

-            public Object getValue() {

-

-                if (name.equals("line-length")) {

-                    return Integer.parseInt(value);

-                }

-

-                if (name.equals("expand-grouping")) {

-                    return Boolean.valueOf(value);

-                }

-                return null;

-            }

-

-        };

-        return yangCompilerPluginParameter;

-

-

-    }

-

-    @Override

-    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,

-                    List<YangCompilerPluginParameter> parameters) throws YangCompilerException {

-        for (YangCompilerPluginParameter parameter : parameters) {

-            if (parameter.getName().equals("output")) {

-                output = (String) parameter.getValue();

-            } else if (parameter.getName().equals("line-length")) {

-                lineLength = (int) parameter.getValue();

-            } else if (parameter.getName().equals("expand-grouping")) {

-                expandGrouping = (boolean) parameter.getValue();

-            }

-        }

-        if (output == null) {

-            throw new YangCompilerException("missing mandatory parameter:output");

-        }

-        File outputDir = new File(output);

-        if (!outputDir.exists()) {

-            outputDir.mkdirs();

-        }

-

-        List<Module> modules = schemaContext.getModules();

-        for (Module module : modules) {

-            String yangTree = buildYangTree(module);

-            FileUtil.writeUtf8File(yangTree, new File(outputDir,

-                    module.getArgStr()

-                            + (module.getCurRevisionDate().isPresent() ? "@" + module.getCurRevisionDate().get() : "")

-                            + "_tree.txt"));

-        }

-    }

-}

+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.plugin.yangtree;
+
+import com.google.gson.JsonElement;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onap.modeling.yangkit.compiler.YangCompiler;
+import org.onap.modeling.yangkit.compiler.YangCompilerException;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPlugin;
+import org.onap.modeling.yangkit.compiler.plugin.YangCompilerPluginParameter;
+import org.yangcentral.yangkit.common.api.QName;
+import org.yangcentral.yangkit.model.api.restriction.LeafRef;
+import org.yangcentral.yangkit.model.api.schema.SchemaTreeType;
+import org.yangcentral.yangkit.model.api.schema.YangSchemaContext;
+
+import org.yangcentral.yangkit.model.api.stmt.Action;
+import org.yangcentral.yangkit.model.api.stmt.Anydata;
+import org.yangcentral.yangkit.model.api.stmt.Anyxml;
+import org.yangcentral.yangkit.model.api.stmt.Augment;
+import org.yangcentral.yangkit.model.api.stmt.Case;
+import org.yangcentral.yangkit.model.api.stmt.Choice;
+import org.yangcentral.yangkit.model.api.stmt.Container;
+import org.yangcentral.yangkit.model.api.stmt.DataDefinition;
+import org.yangcentral.yangkit.model.api.stmt.Entity;
+import org.yangcentral.yangkit.model.api.stmt.Grouping;
+import org.yangcentral.yangkit.model.api.stmt.GroupingDefContainer;
+import org.yangcentral.yangkit.model.api.stmt.IfFeature;
+import org.yangcentral.yangkit.model.api.stmt.IfFeatureSupport;
+import org.yangcentral.yangkit.model.api.stmt.Leaf;
+import org.yangcentral.yangkit.model.api.stmt.MainModule;
+import org.yangcentral.yangkit.model.api.stmt.Module;
+import org.yangcentral.yangkit.model.api.stmt.MultiInstancesDataNode;
+import org.yangcentral.yangkit.model.api.stmt.Notification;
+import org.yangcentral.yangkit.model.api.stmt.Rpc;
+import org.yangcentral.yangkit.model.api.stmt.SchemaDataNode;
+import org.yangcentral.yangkit.model.api.stmt.SchemaNode;
+import org.yangcentral.yangkit.model.api.stmt.SchemaNodeContainer;
+import org.yangcentral.yangkit.model.api.stmt.Status;
+import org.yangcentral.yangkit.model.api.stmt.TypedDataNode;
+import org.yangcentral.yangkit.model.api.stmt.Uses;
+import org.yangcentral.yangkit.model.api.stmt.YangList;
+import org.yangcentral.yangkit.model.api.stmt.YangStatement;
+import org.yangcentral.yangkit.model.api.stmt.YangUnknown;
+import org.yangcentral.yangkit.model.api.stmt.ext.AugmentStructure;
+import org.yangcentral.yangkit.model.api.stmt.ext.YangData;
+import org.yangcentral.yangkit.model.api.stmt.ext.YangDataStructure;
+import org.yangcentral.yangkit.utils.file.FileUtil;
+
+
+public class YangTreeGenerator implements YangCompilerPlugin {
+    private int lineLength = 72;
+    private boolean expandGrouping = true;
+    private String output;
+    private static final String SPACE = " ";
+    private static final String TWO_SPACES = "  ";
+    private static final String OFFSET = "   ";
+    private static final String VERTICAL_OFFSET = "|  ";
+
+    /**
+     * build yang tree from module.
+     * @param module module
+     * @return yang tree string
+     */
+    public String buildYangTree(Module module) {
+        StringBuilder sb = new StringBuilder();
+        if (module instanceof MainModule) {
+            sb.append("module:");
+        } else {
+            sb.append("submodule:");
+        }
+        sb.append(SPACE);
+        sb.append(module.getArgStr());
+        sb.append("\n");
+        //data nodes
+        List<DataDefinition> dataDefs = module.getDataDefChildren();
+
+        //augments
+        List<Augment> augments = module.getAugments();
+
+
+        List<YangUnknown> yangDataList = module.getUnknowns(
+                new QName("urn:ietf:params:xml:ns:yang:ietf-restconf", "yang-data"));
+
+        // yang structure extension
+        List<YangUnknown> yangStructureList = module.getUnknowns(YangDataStructure.YANG_KEYWORD);
+
+        // augment structure extension
+        List<YangUnknown> augmentStructureList = module.getUnknowns(AugmentStructure.YANG_KEYWORD);
+
+        if (!module.getGroupings().isEmpty()
+                && (!expandGrouping
+                || (module.getDataDefChildren().isEmpty()
+                && module.getRpcs().isEmpty()
+                && module.getNotifications().isEmpty()
+                && module.getAugments().isEmpty()
+                && yangDataList.isEmpty()
+                && yangStructureList.isEmpty()
+                && augmentStructureList.isEmpty()))) {
+            sb.append(buildGroupingContainer(module, TWO_SPACES));
+        }
+        //data nodes
+        if (!dataDefs.isEmpty()) {
+            int size = dataDefs.size();
+            boolean last = false;
+            for (int i = 0; i < size; i++) {
+                if (i == (size - 1)) {
+                    last = true;
+                }
+                DataDefinition dataDefinition = dataDefs.get(i);
+                sb.append(buildYangTree(dataDefinition, last, TWO_SPACES, !expandGrouping));
+            }
+        }
+        //augments
+        if (!augments.isEmpty()) {
+            for (Augment augment : augments) {
+                sb.append(buildAugmentRepresentation(augment, TWO_SPACES));
+                sb.append(buildChildren(augment, TWO_SPACES + TWO_SPACES, !expandGrouping));
+            }
+        }
+        //rpcs
+        List<Rpc> rpcs = module.getRpcs();
+        if (!rpcs.isEmpty()) {
+            sb.append(TWO_SPACES);
+            sb.append("rpcs:\n");
+            int size = rpcs.size();
+            boolean last = false;
+            for (int i = 0; i < size; i++) {
+                if (i == (size - 1)) {
+                    last = true;
+                }
+                Rpc rpc = rpcs.get(i);
+                sb.append(buildYangTree(rpc, last, TWO_SPACES + TWO_SPACES, !expandGrouping));
+            }
+        }
+        //notifications
+        List<Notification> notifications = module.getNotifications();
+        if (!notifications.isEmpty()) {
+            sb.append(TWO_SPACES);
+            sb.append("notifications:\n");
+            int size = notifications.size();
+            boolean last = false;
+            for (int i = 0; i < size; i++) {
+                if (i == (size - 1)) {
+                    last = true;
+                }
+                Notification notification = notifications.get(i);
+                sb.append(buildYangTree(notification, last, TWO_SPACES + TWO_SPACES, !expandGrouping));
+            }
+        }
+        //yang data
+        if (!yangDataList.isEmpty()) {
+            for (YangUnknown unknown : yangDataList) {
+                YangData yangData = (YangData) unknown;
+                sb.append(TWO_SPACES);
+                sb.append("yang-data");
+                sb.append(" ");
+                sb.append(yangData.getArgStr());
+                sb.append(":\n");
+                sb.append(buildChildren(yangData, TWO_SPACES + TWO_SPACES, !expandGrouping));
+            }
+        }
+        //structures
+        if (!yangStructureList.isEmpty()) {
+            for (YangUnknown unknown : yangStructureList) {
+                YangDataStructure structure = (YangDataStructure) unknown;
+                sb.append(TWO_SPACES);
+                sb.append("structure");
+                sb.append(" ");
+                sb.append(structure.getArgStr());
+                sb.append(":\n");
+                if (!expandGrouping) {
+                    sb.append(buildGroupingContainer(structure, TWO_SPACES + TWO_SPACES));
+                }
+                sb.append(buildChildren(structure, TWO_SPACES + TWO_SPACES, !expandGrouping));
+
+            }
+        }
+        //augment-structures
+        if (!augmentStructureList.isEmpty()) {
+            for (YangUnknown unknown : augmentStructureList) {
+                AugmentStructure augmentStructure = (AugmentStructure) unknown;
+                sb.append(TWO_SPACES);
+                sb.append("augment-structure");
+                sb.append(" ");
+                sb.append(augmentStructure.getArgStr());
+                sb.append(":\n");
+                sb.append(buildChildren(augmentStructure, TWO_SPACES + TWO_SPACES, !expandGrouping));
+            }
+        }
+
+        return sb.toString();
+    }
+
+    private String buildYangTree(SchemaNode schemaNode, boolean last, String offSet, boolean grouping) {
+        StringBuilder sb = new StringBuilder();
+        if (!grouping && (schemaNode instanceof Uses)) {
+            Uses uses = (Uses) schemaNode;
+            List<SchemaNode> schemaNodes = uses.getSchemaNodeChildren();
+            for (int i = 0; i < schemaNodes.size(); i++) {
+                SchemaNode exSchemaNode = schemaNodes.get(i);
+                boolean subLast = last;
+                if (i != (schemaNodes.size() - 1)) {
+                    subLast = false;
+                }
+                sb.append(buildYangTree(exSchemaNode, subLast, offSet, grouping));
+            }
+            return sb.toString();
+        }
+        if (schemaNode instanceof Augment) {
+            sb.append(buildAugmentRepresentation((Augment) schemaNode, offSet));
+        } else {
+            sb.append(buildNodeRepresentation(schemaNode, offSet));
+        }
+        if ((schemaNode instanceof GroupingDefContainer) && grouping) {
+            sb.append(buildGroupingContainer((GroupingDefContainer) schemaNode, offSet + TWO_SPACES));
+        }
+        if (schemaNode instanceof SchemaNodeContainer) {
+            String childOffSet = offSet;
+            if (schemaNode instanceof Augment) {
+                childOffSet = childOffSet.concat(TWO_SPACES);
+            } else {
+                if (last) {
+                    childOffSet = childOffSet.concat(OFFSET);
+                } else {
+                    childOffSet = childOffSet.concat(VERTICAL_OFFSET);
+                }
+            }
+
+            SchemaNodeContainer schemaNodeContainer;
+            if (!grouping) {
+                schemaNodeContainer = (SchemaNodeContainer) schemaNode;
+            } else {
+                schemaNodeContainer = new GroupingSchemaNodeContainer(schemaNode);
+            }
+
+            sb.append(buildChildren(schemaNodeContainer, childOffSet, grouping));
+        }
+
+        return sb.toString();
+    }
+
+    private String buildGroupingContainer(GroupingDefContainer groupingDefContainer, String offSet) {
+        StringBuilder sb = new StringBuilder();
+        //sb.append(offSet);
+        List<Grouping> groupings = groupingDefContainer.getGroupings();
+        int size = groupings.size();
+        for (int i = 0; i < size; i++) {
+            boolean last = false;
+            if (i == (size - 1)) {
+                last = true;
+            }
+            Grouping grouping = groupings.get(i);
+            sb.append(buildGrouping(grouping, last, offSet));
+        }
+        return sb.toString();
+    }
+
+    private List<SchemaNode> getRealSchemaChildren(SchemaNodeContainer schemaNodeContainer, boolean grouping) {
+        List<SchemaNode> realSchemaNodeChildren = new ArrayList<>();
+
+        for (SchemaNode schemaChild : schemaNodeContainer.getSchemaNodeChildren()) {
+            if (schemaChild instanceof Augment) {
+                Augment augment = (Augment) schemaChild;
+                if (schemaNodeContainer instanceof SchemaNode) {
+                    SchemaNode schemaNodeParent = (SchemaNode) schemaNodeContainer;
+                    if (augment.getContext().getNamespace() != null && !augment.getContext().getNamespace()
+                            .equals(schemaNodeParent.getContext().getNamespace())) {
+                        continue;
+                    }
+                }
+                if (!grouping) {
+                    realSchemaNodeChildren.addAll(getRealSchemaChildren(augment, grouping));
+                    continue;
+                }
+            }
+            realSchemaNodeChildren.add(schemaChild);
+        }
+        return realSchemaNodeChildren;
+    }
+
+    private String buildChildren(SchemaNodeContainer schemaNodeContainer, String offSet, boolean grouping) {
+        StringBuilder sb = new StringBuilder();
+        List<SchemaNode> schemaNodeChildren = schemaNodeContainer.getSchemaNodeChildren();
+        List<SchemaNode> realSchemaNodeChildren = getRealSchemaChildren(schemaNodeContainer, grouping);
+
+        int size = realSchemaNodeChildren.size();
+        for (int i = 0; i < size; i++) {
+            SchemaNode realSchemaNode = realSchemaNodeChildren.get(i);
+            boolean subLast = false;
+            if (i == (size - 1)) {
+                subLast = true;
+            }
+            sb.append(buildYangTree(realSchemaNode, subLast, offSet, grouping));
+
+        }
+        return sb.toString();
+    }
+
+    private String buildGrouping(Grouping grouping, boolean last, String offset) {
+        StringBuilder sb = new StringBuilder();
+        sb.append(offset);
+        sb.append("grouping ");
+        sb.append(grouping.getArgStr());
+        sb.append(":\n");
+        GroupingSchemaNodeContainer groupingSchemaNodeContainer = new GroupingSchemaNodeContainer(grouping);
+        sb.append(buildGroupingContainer(grouping, offset + TWO_SPACES));
+        sb.append(buildChildren(groupingSchemaNodeContainer, offset + TWO_SPACES, true));
+        return sb.toString();
+    }
+
+
+
+    private String getStatus(YangStatement yangStatement) {
+        if (yangStatement instanceof Entity) {
+            Status status = ((Entity) yangStatement).getEffectiveStatus();
+            switch (status) {
+                case CURRENT: {
+                    return "+";
+                }
+                case DEPRECATED: {
+                    return "x";
+                }
+                case OBSOLETE: {
+                    return "o";
+                }
+                default:
+                    throw new IllegalStateException("Unexpected value: " + status);
+            }
+        }
+        return "";
+    }
+
+    private String getFlags(YangStatement yangStatement) {
+        String flags = "";
+        if (yangStatement instanceof SchemaNode) {
+            SchemaNode schemaNode = (SchemaNode) yangStatement;
+            if (schemaNode instanceof Uses) {
+                flags = "-u";
+            } else if ((schemaNode instanceof Rpc) || (schemaNode instanceof Action)) {
+                flags = "-x";
+            } else if (schemaNode instanceof Notification) {
+                flags = "-n";
+            } else if (schemaNode instanceof Case) {
+                flags = "";
+            } else if (schemaNode.isConfig()) {
+                flags = "rw";
+            } else {
+                flags = "ro";
+                if (schemaNode.getSchemaTreeType() == SchemaTreeType.INPUTTREE) {
+                    flags = "-w";
+                }
+            }
+
+            if (!schemaNode.getSubStatement(new QName("urn:ietf:params:xml:ns:yang:ietf-yang-schema-mount",
+                    "mount-point")).isEmpty()) {
+                flags = "mp";
+            }
+        } else if (yangStatement instanceof Grouping) {
+            flags = "rw";
+        }
+
+        return flags;
+    }
+
+    private String getNodeName(YangStatement yangStatement) {
+        if (yangStatement instanceof Case) {
+            return ":(" + yangStatement.getArgStr() + ")";
+        } else if (yangStatement instanceof Choice) {
+            return " (" + yangStatement.getArgStr() + ")";
+        } else {
+            return " " + yangStatement.getArgStr();
+        }
+    }
+
+    private boolean isMandatory(SchemaDataNode dataNode) {
+        //key nodes
+        if (dataNode instanceof Leaf) {
+            SchemaNodeContainer parent = dataNode.getClosestAncestorNode();
+            if (parent instanceof YangList) {
+                YangList list = (YangList) parent;
+                if (list.getKey().getKeyNode(dataNode.getIdentifier()) != null) {
+                    return true;
+                }
+            }
+        }
+        return dataNode.isMandatory();
+    }
+
+    private String getOpts(YangStatement yangStatement) {
+        if ((yangStatement instanceof Leaf)
+                || (yangStatement instanceof Choice)
+                || (yangStatement instanceof Anydata)
+                || (yangStatement instanceof Anyxml)) {
+            if (!isMandatory((SchemaDataNode) yangStatement)) {
+                return "?";
+            }
+        } else if (yangStatement instanceof Container) {
+            if (((Container) yangStatement).isPresence()) {
+                return "!";
+            }
+        } else if (yangStatement instanceof MultiInstancesDataNode) {
+            StringBuilder sb = new StringBuilder("*");
+            if (yangStatement instanceof YangList) {
+                YangList yangList = (YangList) yangStatement;
+                if (yangList.getKey() != null) {
+                    sb.append(" [");
+                    sb.append(yangList.getKey().getArgStr());
+                    sb.append("]");
+                }
+            }
+            return sb.toString();
+        }
+        return "";
+    }
+
+    private String getType(TypedDataNode typedDataNode) {
+        if (typedDataNode.getType().getRestriction() instanceof LeafRef) {
+            LeafRef leafRef = (LeafRef) typedDataNode.getType().getRestriction();
+            return "-> " + leafRef.getEffectivePath().getArgStr();
+        } else {
+            return typedDataNode.getType().getArgStr();
+        }
+    }
+
+    private String getFeatures(IfFeatureSupport ifFeatureSupport) {
+        StringBuilder sb = new StringBuilder();
+        List<IfFeature> ifFeatures = ifFeatureSupport.getIfFeatures();
+        if (!ifFeatures.isEmpty()) {
+            sb.append(" {");
+            int size = ifFeatures.size();
+            for (int i = 0; i < size; i++) {
+                IfFeature ifFeature = ifFeatures.get(i);
+                sb.append(ifFeature.getArgStr());
+                if (i != (size - 1)) {
+                    sb.append(",");
+                }
+            }
+            sb.append("}?");
+        }
+        return sb.toString();
+    }
+
+    private String wrapLongPath(String offSet, String longPath) {
+        if ((offSet.length() + longPath.length()) <= lineLength) {
+            return offSet + longPath;
+        }
+        StringBuilder wrappedLine = new StringBuilder(offSet);
+        String firstCandidatePath = longPath.substring(0, lineLength - offSet.length());
+        int index = firstCandidatePath.lastIndexOf("/");
+        firstCandidatePath = firstCandidatePath.substring(0, index);
+        wrappedLine.append(firstCandidatePath);
+        wrappedLine.append("\n");
+        String nextOffSet = offSet + "  ";
+        String nextLongPath = longPath.substring(index);
+        wrappedLine.append(wrapLongPath(nextOffSet, nextLongPath));
+        return wrappedLine.toString();
+    }
+
+    /**
+     * build augmentation representation string.
+     * @param augment augment
+     * @param offSet offset
+     * @return string
+     */
+    public String buildAugmentRepresentation(Augment augment, String offSet) {
+        StringBuilder sb = new StringBuilder(offSet);
+        int beginIndex = sb.length();
+        sb.append("augment");
+        sb.append(" ");
+        int nameIndex = sb.length();
+        sb.append(augment.getArgStr());
+        sb.append(":\n");
+        if (sb.length() > lineLength) {
+            String subString = sb.substring(0, lineLength);
+            int index = subString.lastIndexOf("/");
+            StringBuilder newSb = new StringBuilder();
+            String firstLine = sb.substring(0, index);
+            newSb.append(firstLine);
+            newSb.append("\n");
+            newSb.append(offSet);
+            for (int i = beginIndex; i < (nameIndex + 2); i++) {
+                newSb.append(" ");
+            }
+            newSb.append(sb.substring(index));
+            return newSb.toString();
+        }
+        return sb.toString();
+    }
+
+    /**
+     * build a node representation from yang statement.
+     * @param yangStatement yang statement.
+     * @param offSet offset.
+     * @return string
+     */
+    public String buildNodeRepresentation(YangStatement yangStatement, String offSet) {
+        StringBuilder sb = new StringBuilder(offSet);
+        int beginIndex = sb.length();
+        //status
+        sb.append(getStatus(yangStatement)).append("--");
+        //flags
+        sb.append(getFlags(yangStatement));
+        //name
+        String name = getNodeName(yangStatement);
+        int nameIndex = sb.length();
+        if (name.startsWith(" ")) {
+            nameIndex++;
+        }
+        sb.append(name);
+        sb.append(getOpts(yangStatement));
+
+
+        if (yangStatement instanceof TypedDataNode) {
+            int typeIndex = sb.length();
+            TypedDataNode typedDataNode = (TypedDataNode) yangStatement;
+            String type = getType(typedDataNode);
+            if (type.length() + typeIndex + 1 > lineLength) {
+                //change line
+                StringBuilder newLine = new StringBuilder();
+
+                StringBuilder newOffSet = new StringBuilder(offSet);
+
+                for (int i = beginIndex; i < nameIndex + 2; i++) {
+                    newOffSet.append(" ");
+                }
+                newLine.append(newOffSet);
+                newLine.append(type);
+
+                if ((typedDataNode.getType().getRestriction() instanceof LeafRef)
+                        && (newLine.length() > lineLength)) {
+                    sb.append(" ");
+                    sb.append("leafref");
+                } else {
+                    sb.append("\n");
+                    sb.append(newLine);
+                }
+
+
+            } else {
+                sb.append(" ");
+                sb.append(type);
+            }
+        }
+
+        if (yangStatement instanceof IfFeatureSupport) {
+            IfFeatureSupport ifFeatureSupport = (IfFeatureSupport) yangStatement;
+            String features = getFeatures(ifFeatureSupport);
+            if (features.length() > 0) {
+                int ifFeatureIndex = sb.length();
+                int lastCrIndex = sb.lastIndexOf("\n");
+                if (lastCrIndex == -1) {
+                    lastCrIndex = 0;
+                }
+                if (((ifFeatureIndex - lastCrIndex) + features.length()) > lineLength) {
+                    //change line
+                    sb.append("\n");
+                    sb.append(offSet);
+                    for (int i = beginIndex; i < (nameIndex + 2); i++) {
+                        sb.append(" ");
+                    }
+                    sb.append(features);
+                } else {
+                    sb.append(" ");
+                    sb.append(features);
+                }
+            }
+
+        }
+        sb.append("\n");
+        return sb.toString();
+    }
+
+    @Override
+    public YangCompilerPluginParameter getParameter(String name, JsonElement value)
+            throws YangCompilerException {
+        if (!name.equals("output") && !name.equals("line-length")
+                && !name.equals("expand-grouping")) {
+            throw new YangCompilerException("unrecognized parameter:" + name);
+        }
+        if (name.equals("output")) {
+            return YangCompilerPlugin.super.getParameter(name, value);
+        }
+        YangCompilerPluginParameter yangCompilerPluginParameter = new YangCompilerPluginParameter() {
+            @Override
+            public String getName() {
+                return name;
+            }
+
+            @Override
+            public Object getValue() {
+
+                if (name.equals("line-length")) {
+                    return value.getAsInt();
+                }
+
+                if (name.equals("expand-grouping")) {
+                    return value.getAsBoolean();
+                }
+                return null;
+            }
+
+        };
+        return yangCompilerPluginParameter;
+
+
+    }
+
+    @Override
+    public void run(YangSchemaContext schemaContext, YangCompiler yangCompiler,
+                    List<YangCompilerPluginParameter> parameters) throws YangCompilerException {
+        for (YangCompilerPluginParameter parameter : parameters) {
+            if (parameter.getName().equals("output")) {
+                output = (String) parameter.getValue();
+            } else if (parameter.getName().equals("line-length")) {
+                lineLength = (int) parameter.getValue();
+            } else if (parameter.getName().equals("expand-grouping")) {
+                expandGrouping = (boolean) parameter.getValue();
+            }
+        }
+        if (output == null) {
+            throw new YangCompilerException("missing mandatory parameter:output");
+        }
+        File outputDir = new File(output);
+        if (!outputDir.exists()) {
+            outputDir.mkdirs();
+        }
+
+        List<Module> modules = schemaContext.getModules();
+        for (Module module : modules) {
+            String yangTree = buildYangTree(module);
+            FileUtil.writeUtf8File(yangTree, new File(outputDir,
+                    module.getArgStr()
+                            + (module.getCurRevisionDate().isPresent() ? "@" + module.getCurRevisionDate().get() : "")
+                            + "_tree.txt"));
+        }
+    }
+}
diff --git a/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/util/YangCompilerUtil.java b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/util/YangCompilerUtil.java
new file mode 100644
index 0000000..19a63bd
--- /dev/null
+++ b/yang-compiler/src/main/java/org/onap/modeling/yangkit/compiler/util/YangCompilerUtil.java
@@ -0,0 +1,441 @@
+/*
+Copyright 2023 Huawei Technologies
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package org.onap.modeling.yangkit.compiler.util;
+
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.Authenticator;
+import java.net.HttpURLConnection;
+import java.net.InetSocketAddress;
+import java.net.PasswordAuthentication;
+import java.net.Proxy;
+import java.net.URI;
+import java.net.URL;
+import java.net.URLConnection;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.List;
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.KeyManager;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+import org.onap.modeling.yangkit.catalog.ModuleInfo;
+import org.onap.modeling.yangkit.catalog.YangCatalog;
+import org.onap.modeling.yangkit.compiler.Settings;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yangcentral.yangkit.base.YangBuiltinKeyword;
+
+
+import org.yangcentral.yangkit.model.api.stmt.Module;
+import org.yangcentral.yangkit.model.api.stmt.SubModule;
+import org.yangcentral.yangkit.model.api.stmt.YangStatement;
+
+public class YangCompilerUtil {
+    private static final Logger logger = LoggerFactory.getLogger(YangCompilerUtil.class);
+
+    private static ModuleInfo buildModuleInfo(File file) {
+        String fileName = file.getName();
+        String moduleDesc = fileName.substring(0, fileName.indexOf(".yang"));
+        String[] moduleInfos = moduleDesc.split("@");
+        String moduleName = moduleInfos[0];
+        String revision = moduleInfos[1];
+        ModuleInfo targetModuleInfo = new ModuleInfo(moduleName, revision, null);
+        targetModuleInfo.setSchema(file.toURI());
+        return targetModuleInfo;
+    }
+
+    /**
+     * get schema information from local repository.
+     * @param moduleInfo moduleInfo input, as a filter
+     * @param settings settings of yang compiler
+     * @return module information
+     */
+    public static ModuleInfo getSchemaFromLocal(ModuleInfo moduleInfo, Settings settings) {
+        File localRepository = new File(settings.getLocalRepository());
+        if (!localRepository.exists()) {
+            localRepository.mkdirs();
+        }
+        String prefix = moduleInfo.getModuleInfo();
+        String suffix = ".yang";
+        FilenameFilter filenameFilter = new FilenameFilter() {
+            @Override
+            public boolean accept(File dir, String name) {
+                if (dir != localRepository) {
+                    return false;
+                }
+                if (name.startsWith(prefix) && name.endsWith(suffix)) {
+                    String moduleDesc = name.substring(0, name.indexOf(suffix));
+                    String[] moduleInfos = moduleDesc.split("@");
+                    String moduleName = moduleInfos[0];
+                    String revision = moduleInfos[1];
+                    if (!moduleName.equals(moduleInfo.getName())) {
+                        return false;
+                    }
+                    if (moduleInfo.withRevision()) {
+                        if (!revision.equals(moduleInfo.getRevision())) {
+                            return false;
+                        }
+                    }
+                    return true;
+                }
+                return false;
+            }
+        };
+
+        File[] matched = localRepository.listFiles(filenameFilter);
+        if (matched == null || matched.length == 0) {
+            return null;
+        }
+        if (matched.length == 1) {
+            return buildModuleInfo(matched[0]);
+        }
+        File latest = null;
+        for (File file : matched) {
+            if (latest == null) {
+                latest = file;
+            } else {
+                if (file.getName().compareTo(latest.getName()) > 0) {
+                    latest = file;
+                }
+            }
+        }
+
+        return buildModuleInfo(latest);
+    }
+
+    /**
+     * get schema information from module information of settings.
+     * @param moduleInfo  moduleInfo input, as a filter
+     * @param moduleInfoList the list of module information of settings
+     * @return module information.
+     */
+    public static ModuleInfo getSchemaFromModuleInfos(ModuleInfo moduleInfo, List<ModuleInfo> moduleInfoList) {
+        if (null != moduleInfoList) {
+            ModuleInfo targetModuleInfo = null;
+            // if module info is not null, try to find the matched module info.
+            // note: if the revision is null, it means match the latest module info
+            for (ModuleInfo mi : moduleInfoList) {
+                if (!mi.getName().equals(moduleInfo.getName())) {
+                    continue;
+                }
+                if (moduleInfo.withRevision()) {
+                    if (moduleInfo.getRevision().equals(mi.getRevision())) {
+                        targetModuleInfo = mi;
+                        break;
+                    }
+                } else {
+                    if (targetModuleInfo == null) {
+                        targetModuleInfo = mi;
+                    } else {
+                        if (targetModuleInfo.getRevision().compareTo(mi.getRevision()) < 0) {
+                            targetModuleInfo = mi;
+                        }
+                    }
+                }
+            }
+            //if not found,try to find it from local repository
+            if (targetModuleInfo != null) {
+                return targetModuleInfo;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * invoke a url.
+     * @param url url
+     * @param settings settings
+     * @return input stream
+     * @throws IOException io exception
+     */
+    public static InputStream urlInvoke(String url, Settings settings) throws IOException {
+        URL catalogUrl = URI.create(url).toURL();
+        return urlInvoke(catalogUrl, settings);
+    }
+
+    /**
+     * invoke a url.
+     * @param url url
+     * @param settings settings
+     * @return input stream
+     * @throws IOException io exception.
+     */
+    public static InputStream urlInvoke(URL url, Settings settings) throws IOException {
+        Proxy proxy = null;
+        Authenticator authenticator = null;
+        if (settings.getProxy() != null) {
+            String protocol = url.getProtocol();
+            Proxy.Type proxyType = null;
+            if (protocol.equalsIgnoreCase("http") || protocol.equalsIgnoreCase("https")) {
+                proxyType = Proxy.Type.HTTP;
+            } else {
+                proxyType = Proxy.Type.SOCKS;
+            }
+            proxy = new Proxy(proxyType,
+                    new InetSocketAddress(settings.getProxy().getHostName(), settings.getProxy().getPort()));
+            if (settings.getProxy().getAuthentication() != null) {
+                authenticator = new Authenticator() {
+                    @Override
+                    protected PasswordAuthentication getPasswordAuthentication() {
+                        return new PasswordAuthentication(settings.getProxy().getAuthentication().getName(),
+                                settings.getProxy().getAuthentication().getPassword().toCharArray()
+                        );
+                    }
+                };
+                Authenticator.setDefault(authenticator);
+            }
+
+        }
+        return urlGet(url, proxy, authenticator, settings.getToken(), 120000, 100000);
+    }
+
+    /**
+     * invoke a url and return string.
+     * @param url url
+     * @param settings settings
+     * @return string
+     * @throws IOException io exception
+     */
+    public static String urlInvoke2String(String url, Settings settings) throws IOException {
+        InputStream inputStream = urlInvoke(url, settings);
+        StringBuilder sb = new StringBuilder();
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
+
+        String output;
+        while ((output = bufferedReader.readLine()) != null) {
+            sb.append(output);
+            sb.append("\n");
+        }
+        bufferedReader.close();
+        inputStream.close();
+        return sb.toString();
+
+    }
+
+    /**
+     * get schema information from remote repository.
+     * @param moduleInfo module information, as a filter
+     * @param settings  settings
+     * @return module information
+     * @throws IOException io exception
+     */
+    public static ModuleInfo getSchemaFromRemote(ModuleInfo moduleInfo, Settings settings) throws IOException {
+        ModuleInfo targetModuleInfo = null;
+        if (moduleInfo.getRevision() == null || moduleInfo.getRevision().equals("")) {
+            String url = settings.getRemoteRepository() + "search/name/" + moduleInfo.getName();
+            YangCatalog yangCatalog = YangCatalog.parse(urlInvoke2String(url, settings));
+            targetModuleInfo = yangCatalog.getLatestModule(moduleInfo.getName());
+        } else {
+            String organization = moduleInfo.getOrganization();
+            if (organization == null) {
+                organization = moduleInfo.getName().substring(0, moduleInfo.getName().indexOf("-"));
+            }
+
+            if (organization.equals("junos")) {
+                organization = "juniper";
+            }
+            String url = settings.getRemoteRepository()
+                    + "search/modules/"
+                    + moduleInfo.getName()
+                    + ","
+                    + moduleInfo.getRevision()
+                    + ","
+                    + organization;
+
+            targetModuleInfo = ModuleInfo.parse(urlInvoke2String(url, settings));
+        }
+        if (targetModuleInfo == null) {
+            return null;
+        }
+        return targetModuleInfo;
+    }
+
+    /**
+     * get schema according to module information (as a filter).
+     * @param moduleInfo module information, as a filter
+     * @param settings settings
+     * @return module information
+     * @throws IOException io exception
+     */
+    public static ModuleInfo getSchema(ModuleInfo moduleInfo, Settings settings) throws IOException {
+
+        ModuleInfo targetModuleInfo = null;
+        //get schema from module information of settings
+        logger.info("get schema for module:" + moduleInfo.getModuleInfo());
+        List<ModuleInfo> moduleInfoList = settings.getModuleInfos();
+        targetModuleInfo = getSchemaFromModuleInfos(moduleInfo, moduleInfoList);
+        if (targetModuleInfo != null) {
+            logger.info(
+                    "find schema:" + targetModuleInfo.getSchema() + " for module:" + targetModuleInfo.getModuleInfo());
+            return targetModuleInfo;
+        }
+        //get schema from local repository
+        targetModuleInfo = getSchemaFromLocal(moduleInfo, settings);
+        if (targetModuleInfo != null) {
+            logger.info(
+                    "find schema:" + targetModuleInfo.getSchema() + " for module:" + targetModuleInfo.getModuleInfo());
+            return targetModuleInfo;
+        }
+
+        //get schema from remote repository
+        try {
+            targetModuleInfo = getSchemaFromRemote(moduleInfo, settings);
+            if (null != targetModuleInfo) {
+                logger.info("find schema:" + targetModuleInfo.getSchema()
+                        + " for module:"
+                        + targetModuleInfo.getModuleInfo());
+                return targetModuleInfo;
+            }
+            logger.warn("can not find schema for module:" + moduleInfo.getModuleInfo());
+            return null;
+
+        } catch (RuntimeException e) {
+            logger.error(e.getMessage());
+            return null;
+        }
+
+    }
+
+    /**
+     * send get operation to a url, and return input stream.
+     * @param url url
+     * @param proxy proxy
+     * @param authenticator authenticator
+     * @param token token
+     * @param connectionTimeout time out for connection
+     * @param readTimeout time out for read
+     * @return input stream
+     * @throws IOException io exception
+     */
+    public static InputStream urlGet(URL url, Proxy proxy, Authenticator authenticator, String token,
+                                     int connectionTimeout, int readTimeout) throws IOException {
+        URLConnection urlConnection;
+        if (proxy != null) {
+            urlConnection = url.openConnection(proxy);
+        } else {
+            urlConnection = url.openConnection();
+        }
+
+        if (null != authenticator) {
+            Authenticator.setDefault(authenticator);
+        }
+
+        if (token != null) {
+            urlConnection.setRequestProperty("Authorization", "Token " + token);
+        }
+
+        urlConnection.setConnectTimeout(connectionTimeout);
+        urlConnection.setReadTimeout(readTimeout);
+        if (urlConnection instanceof HttpURLConnection) {
+            if (urlConnection instanceof HttpsURLConnection) {
+                TrustManager[] trustManagers = new TrustManager[]{new X509TrustManager() {
+                    public void checkClientTrusted(X509Certificate[] x509Certificates, String str)
+                            throws CertificateException {
+                    }
+
+                    public void checkServerTrusted(X509Certificate[] x509Certificates, String str)
+                            throws CertificateException {
+                    }
+
+                    public X509Certificate[] getAcceptedIssuers() {
+                        return new X509Certificate[0];
+                    }
+                }};
+
+                try {
+                    SSLContext context = SSLContext.getInstance("TLS");
+                    context.init((KeyManager[]) null, trustManagers, (SecureRandom) null);
+                    ((HttpsURLConnection) urlConnection).setSSLSocketFactory(context.getSocketFactory());
+                } catch (NoSuchAlgorithmException var10) {
+                    throw new RuntimeException(var10);
+                } catch (KeyManagementException var11) {
+                    throw new RuntimeException(var11);
+                }
+            }
+
+            HttpURLConnection httpUrlConnection = (HttpURLConnection) urlConnection;
+            httpUrlConnection.setRequestMethod("GET");
+            logger.info("get from url:" + url + "...");
+            int responseCode = httpUrlConnection.getResponseCode();
+            if (responseCode != 200) {
+                logger.error("failed");
+                throw new RuntimeException("GET request:" + url + " failed with error code=" + responseCode);
+            }
+            logger.info("ok");
+        }
+
+        return urlConnection.getInputStream();
+
+    }
+
+    /**
+     * get dependencies of a specified module.
+     * @param module module
+     * @return list of dependencies
+     */
+    public static List<ModuleInfo> getDependencies(Module module) {
+        List<ModuleInfo> dependencies = new ArrayList<>();
+        if (module == null) {
+            return dependencies;
+        }
+        List<YangStatement> importStatements = module.getSubStatement(YangBuiltinKeyword.IMPORT.getQName());
+        for (YangStatement importStatement : importStatements) {
+            String moduleName = importStatement.getArgStr();
+            String revision = null;
+            List<YangStatement> revisions = importStatement.getSubStatement(YangBuiltinKeyword.REVISIONDATE.getQName());
+            if (revisions.isEmpty()) {
+                revision = "";
+            } else {
+                revision = revisions.get(0).getArgStr();
+            }
+            ModuleInfo moduleInfo = new ModuleInfo(moduleName, revision);
+            dependencies.add(moduleInfo);
+        }
+        List<YangStatement> includeStatements = module.getSubStatement(YangBuiltinKeyword.INCLUDE.getQName());
+        for (YangStatement includeStatement : includeStatements) {
+            String moduleName = includeStatement.getArgStr();
+            String revision = null;
+            List<YangStatement> revisions =
+                    includeStatement.getSubStatement(YangBuiltinKeyword.REVISIONDATE.getQName());
+            if (revisions.isEmpty()) {
+                revision = "";
+            } else {
+                revision = revisions.get(0).getArgStr();
+            }
+            ModuleInfo moduleInfo = new ModuleInfo(moduleName, revision);
+            dependencies.add(moduleInfo);
+        }
+        if (module instanceof SubModule) {
+            List<YangStatement> belongsToStatements = module.getSubStatement(YangBuiltinKeyword.BELONGSTO.getQName());
+            String moduleName = belongsToStatements.get(0).getArgStr();
+            ModuleInfo moduleInfo = new ModuleInfo(moduleName, "");
+            dependencies.add(moduleInfo);
+        }
+        return dependencies;
+    }
+}
diff --git a/yang-compiler/src/main/resources/log4j.properties b/yang-compiler/src/main/resources/log4j.properties
new file mode 100644
index 0000000..7fae67c
--- /dev/null
+++ b/yang-compiler/src/main/resources/log4j.properties
@@ -0,0 +1,25 @@
+### settings###
+log4j.rootLogger = debug,stdout,D,E
+
+### output to console ###
+log4j.appender.stdout = org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.Target = System.out
+log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
+log4j.appender.stdout.Threshold = INFO
+log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} %m%n
+### method:%l%n###
+### ??DEBUG ????????=logs/debug.log ###
+log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
+log4j.appender.D.File = logs/debug.log
+log4j.appender.D.Append = true
+log4j.appender.D.Threshold = DEBUG 
+log4j.appender.D.layout = org.apache.log4j.PatternLayout
+log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
+
+### ??ERROR ????????=logs/error.log ###
+log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
+log4j.appender.E.File = logs/error.log 
+log4j.appender.E.Append = true
+log4j.appender.E.Threshold = ERROR 
+log4j.appender.E.layout = org.apache.log4j.PatternLayout
+log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
diff --git a/yang-compiler/src/main/resources/plugins.json b/yang-compiler/src/main/resources/plugins.json
new file mode 100644
index 0000000..afd32f0
--- /dev/null
+++ b/yang-compiler/src/main/resources/plugins.json
@@ -0,0 +1,60 @@
+{
+  "plugins": {
+    "plugin": [
+      {
+        "name": "schema_validator",
+        "class-path": "",
+        "class": "org.yangcentral.yangkit.compiler.plugin.validator.YangValidator",
+        "description": "a plugin for validating yang files",
+        "parameter": [
+          {
+            "name": "output",
+            "description": "the output directory."
+          }
+        ]
+      },
+      {
+        "name": "yang_statistics",
+        "class-path": "",
+        "class": "org.yangcentral.yangkit.compiler.plugin.stat.YangStatistics",
+        "description": "a plugin for retrieving yang statistics",
+        "parameter": [
+          {
+            "name": "output",
+            "description": "the output file."
+          }
+        ]
+      },
+      {
+        "name": "yangtree_generator",
+        "class": "org.yangcentral.yangkit.compiler.plugin.yangtree.YangTreeGenerator",
+        "description": "a plugin for generating yang tree",
+        "parameter": [
+          {
+            "name": "output",
+            "description": "the output directory for generated yang tree."
+          },
+          {
+            "name": "line-length",
+            "description": "integer,default is 72, a line max length."
+          },
+          {
+            "name": "expand-grouping",
+            "description": "boolean,default is true,indicate whether expand grouping"
+          }
+        ]
+      },
+      {
+        "name": "yangpackage_generator",
+        "class": "org.yangcentral.yangkit.compiler.plugin.yangpackage.YangPackageGenerator",
+        "description": "a plugin for generating yang package",
+        "parameter": [
+          {
+            "name": "output",
+            "description": "string, the file name(include parent path) of yang package instance."
+          }
+        ]
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/yang-compiler/src/main/resources/yang-compiler.png b/yang-compiler/src/main/resources/yang-compiler.png
new file mode 100644
index 0000000..2abbbb2
--- /dev/null
+++ b/yang-compiler/src/main/resources/yang-compiler.png
diff --git a/yang-compiler/src/main/resources/yc-build.yang b/yang-compiler/src/main/resources/yc-build.yang
new file mode 100644
index 0000000..b8c2929
--- /dev/null
+++ b/yang-compiler/src/main/resources/yc-build.yang
@@ -0,0 +1,54 @@
+module yc-build {
+  namespace "urn:yangcentral:yang:yang-compiler-settings";
+  prefix "ycs";
+  yang-version "1.1";
+  import ietf-inet {
+    prefix inet;
+  }
+  description "The definition about yang compiler settings.";
+
+  revision 2022-09-02 {
+    description "init version.";
+  }
+  container yang {
+    leaf-list dir {
+      type string;
+    }
+    leaf-list file {
+      type string;
+    }
+    list module {
+      key "name revision";
+      leaf name {
+        type string;
+      }
+      leaf revision {
+        type string;
+      }
+      leaf organization {
+        type string;
+      }
+      leaf schema {
+        type inet:uri;
+      }
+    }
+  }
+  leaf settings {
+    type string;
+    description "the path of settings file.";
+  }
+  list plugin {
+    key name;
+    leaf name {
+      type string;
+    }
+    list parameter {
+        key name;
+        leaf name {
+          type string;
+        }
+        anydata value;
+    }
+  }
+
+}
\ No newline at end of file
diff --git a/yang-compiler/src/main/resources/yc-yang-compiler-settings.yang b/yang-compiler/src/main/resources/yc-yang-compiler-settings.yang
new file mode 100644
index 0000000..7fb3910
--- /dev/null
+++ b/yang-compiler/src/main/resources/yc-yang-compiler-settings.yang
@@ -0,0 +1,20 @@
+module yc-yang-compiler-settings {
+  namespace "urn:yangcentral:yang:yang-compiler-settings";
+  prefix "ycs";
+  import ietf-inet {
+    prefix inet;
+  }
+  description "The definition about yang compiler settings.";
+
+  revision 2022-09-02 {
+    description "init version.";
+  }
+
+  container settings {
+    leaf local-repository {
+      type string;
+      description "The definition of local repository. It should be a local directory.
+                   if not present, the default is ${user.home}/.yang";
+    }
+  }
+}