1 files changed, 187 insertions, 0 deletions
diff --git a/src/main/java/org/onap/aai/spike/schema/OXMModelLoader.java b/src/main/java/org/onap/aai/spike/schema/OXMModelLoader.java
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+++ b/src/main/java/org/onap/aai/spike/schema/OXMModelLoader.java
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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 Amdocs
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aai.spike.schema;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
+import org.onap.aai.cl.eelf.LoggerFactory;
+import org.onap.aai.nodes.NodeIngestor;
+import org.onap.aai.setup.ConfigTranslator;
+import org.onap.aai.setup.SchemaLocationsBean;
+import org.onap.aai.setup.Version;
+import org.onap.aai.spike.exception.SpikeException;
+import org.onap.aai.spike.logging.SpikeMsgs;
+import org.onap.aai.spike.util.SchemaIngestPropertiesReader;
+
+/**
+ * This class contains all of the logic for importing OXM model schemas from the available OXM
+ * schema files.
+ */
+public class OXMModelLoader {
+
+    private static Map<String, DynamicJAXBContext> versionContextMap =
+            new ConcurrentHashMap<String, DynamicJAXBContext>();
+
+    final static Pattern p = Pattern.compile("aai_oxm_(.*).xml");
+    final static Pattern versionPattern = Pattern.compile("V(\\d*)");
+
+    private static org.onap.aai.cl.api.Logger logger =
+            LoggerFactory.getInstance().getLogger(OXMModelLoader.class.getName());
+
+    /**
+     * Finds all OXM model files
+     * 
+     * @throws SpikeException
+     * @throws IOException
+     *
+     */
+    public synchronized static void loadModels() throws SpikeException {
+        SchemaIngestPropertiesReader schemaIngestPropReader = new SchemaIngestPropertiesReader();
+        SchemaLocationsBean schemaLocationsBean = new SchemaLocationsBean();
+        schemaLocationsBean.setNodeDirectory(schemaIngestPropReader.getNodeDir());
+        schemaLocationsBean.setEdgeDirectory(schemaIngestPropReader.getEdgeDir());
+        ConfigTranslator configTranslator = new OxmConfigTranslator(schemaLocationsBean);
+        NodeIngestor nodeIngestor = new NodeIngestor(configTranslator);
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Loading OXM Models");
+        }
+
+        for (Version oxmVersion : Version.values()) {
+            DynamicJAXBContext jaxbContext = nodeIngestor.getContextForVersion(oxmVersion);
+            if (jaxbContext != null) {
+                loadModel(oxmVersion.toString(), jaxbContext);
+            }
+        }
+    }
+
+
+    private synchronized static void loadModel(String oxmVersion, DynamicJAXBContext jaxbContext) {
+        versionContextMap.put(oxmVersion, jaxbContext);
+        logger.info(SpikeMsgs.LOADED_OXM_FILE, oxmVersion);
+    }
+
+    /**
+     * Retrieves the JAXB context for the specified OXM model version.
+     *
+     * @param version - The OXM version that we want the JAXB context for.
+     *
+     * @return - A JAXB context derived from the OXM model schema.
+     *
+     * @throws SpikeException
+     */
+    public static DynamicJAXBContext getContextForVersion(String version) throws SpikeException {
+
+        // If we haven't already loaded in the available OXM models, then do so now.
+        if (versionContextMap == null || versionContextMap.isEmpty()) {
+            loadModels();
+        } else if (!versionContextMap.containsKey(version)) {
+            throw new SpikeException("Error loading oxm model: " + version);
+        }
+
+        return versionContextMap.get(version);
+    }
+
+    public static String getLatestVersion() throws SpikeException {
+
+        // If we haven't already loaded in the available OXM models, then do so now.
+        if (versionContextMap == null || versionContextMap.isEmpty()) {
+            loadModels();
+        }
+
+        // If there are still no models available, then there's not much we can do...
+        if (versionContextMap.isEmpty()) {
+            throw new SpikeException("No available OXM schemas to get latest version for.");
+        }
+
+        // Iterate over the available model versions to determine which is the most
+        // recent.
+        Integer latestVersion = null;
+        String latestVersionStr = null;
+        for (String versionKey : versionContextMap.keySet()) {
+
+            Matcher matcher = versionPattern.matcher(versionKey);
+            if (matcher.find()) {
+
+                int currentVersion = Integer.valueOf(matcher.group(1));
+
+                if ((latestVersion == null) || (currentVersion > latestVersion)) {
+                    latestVersion = currentVersion;
+                    latestVersionStr = versionKey;
+                }
+            }
+        }
+
+        return latestVersionStr;
+    }
+
+    /**
+     * Retrieves the map of all JAXB context objects that have been created by importing the available
+     * OXM model schemas.
+     *
+     * @return - Map of JAXB context objects.
+     */
+    public static Map<String, DynamicJAXBContext> getVersionContextMap() {
+        return versionContextMap;
+    }
+
+    /**
+     * Assigns the map of all JAXB context objects.
+     *
+     * @param versionContextMap
+     */
+    public static void setVersionContextMap(Map<String, DynamicJAXBContext> versionContextMap) {
+        OXMModelLoader.versionContextMap = versionContextMap;
+    }
+
+    /**
+     * Retrieves the list of all Loaded OXM versions.
+     *
+     * @return - A List of Strings of all loaded OXM versions.
+     *
+     * @throws SpikeException
+     */
+    public static List<String> getLoadedOXMVersions() throws SpikeException {
+        // If we haven't already loaded in the available OXM models, then do so now.
+        if (versionContextMap == null || versionContextMap.isEmpty()) {
+            loadModels();
+        }
+        // If there are still no models available, then there's not much we can do...
+        if (versionContextMap.isEmpty()) {
+            logger.error(SpikeMsgs.OXM_LOAD_ERROR, "No available OXM schemas to get versions for.");
+            throw new SpikeException("No available OXM schemas to get latest version for.");
+        }
+        List<String> versions = new ArrayList<String>();
+        for (String versionKey : versionContextMap.keySet()) {
+            Matcher matcher = versionPattern.matcher(versionKey.toUpperCase());
+            if (matcher.find()) {
+                versions.add("V" + matcher.group(1));
+            }
+        }
+        return versions;
+    }
+}