add fluent type builder support to A&AI client

add fluent type builder support to A&AI client

Issue-ID: SO-2856
Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
Change-Id: I2957aedb84a1c6b23979ff2e1c4dfb16b3a646c7

6 files changed, 725 insertions, 0 deletions

diff --git a/graph-inventory/fluent-builder-maven-plugin/pom.xml b/graph-inventory/fluent-builder-maven-plugin/pom.xml
new file mode 100644
index 0000000000..7833bce48e
--- /dev/null
+++ b/graph-inventory/fluent-builder-maven-plugin/pom.xml
@@ -0,0 +1,55 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.onap.so</groupId>
+    <artifactId>graph-inventory</artifactId>
+    <version>1.6.0-SNAPSHOT</version>
+  </parent>
+  <artifactId>fluent-builder-maven-plugin</artifactId>
+  <packaging>maven-plugin</packaging>
+  <properties>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target>
+  </properties>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-plugin-plugin</artifactId>
+        <version>3.6.0</version>
+        <configuration>
+          <goalPrefix>fluent-builder</goalPrefix>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-plugin-api</artifactId>
+      <version>3.6.3</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.plugin-tools</groupId>
+      <artifactId>maven-plugin-annotations</artifactId>
+      <version>3.6.0</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-project</artifactId>
+      <version>2.2.1</version>
+    </dependency>
+    <dependency>
+      <groupId>io.swagger</groupId>
+      <artifactId>swagger-parser</artifactId>
+      <version>1.0.50</version>
+    </dependency>
+    <dependency>
+      <groupId>com.squareup</groupId>
+      <artifactId>javapoet</artifactId>
+      <version>1.12.1</version>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/FluentGenerator.java b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/FluentGenerator.java
new file mode 100644
index 0000000000..f9c664389b
--- /dev/null
+++ b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/FluentGenerator.java
@@ -0,0 +1,324 @@
+package org.onap.graphinventory.generate;
+
+import java.io.IOException;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.stream.Collectors;
+import javax.lang.model.element.Modifier;
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.maven.plugin.logging.Log;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.google.common.base.CaseFormat;
+import com.squareup.javapoet.ClassName;
+import com.squareup.javapoet.CodeBlock;
+import com.squareup.javapoet.FieldSpec;
+import com.squareup.javapoet.JavaFile;
+import com.squareup.javapoet.MethodSpec;
+import com.squareup.javapoet.ParameterSpec;
+import com.squareup.javapoet.ParameterizedTypeName;
+import com.squareup.javapoet.TypeSpec;
+
+public class FluentGenerator {
+
+    private final Map<String, ObjectType> doc;
+    private final String location;
+    private final String CLASSPATH;
+
+    private final String singularBuilderClass;
+    private final String pluralBuilderClass;
+    private final String topLevelBuilderClass;
+    private final String baseBuilderClass;
+    private final String singularClass;
+    private final String pluralClass;
+    private final String builderName;
+    private final String nameClass;
+
+    public FluentGenerator(Log log, String location, String destinationClasspath, String swaggerLocation,
+            String builderName, String singularBuilderClass, String pluralBuilderClass, String topLevelBuilderClass,
+            String baseBuilderClass, String singularClass, String pluralClass, String nameClass)
+            throws JsonProcessingException {
+
+        this.location = location;
+        this.CLASSPATH = destinationClasspath;
+        this.builderName = builderName;
+        this.singularBuilderClass = singularBuilderClass;
+        this.pluralBuilderClass = pluralBuilderClass;
+        this.topLevelBuilderClass = topLevelBuilderClass;
+        this.baseBuilderClass = baseBuilderClass;
+        this.singularClass = singularClass;
+        this.pluralClass = pluralClass;
+        this.nameClass = nameClass;
+        doc = new SwaggerConverter(log).getDoc(swaggerLocation);
+    }
+
+    public void run() throws IOException {
+        List<JavaFile> files = new ArrayList<>();
+        for (Entry<String, ObjectType> entry : doc.entrySet()) {
+            // String key = "routing-instance";
+            // ObjectType oType = test;
+            String key = entry.getKey();
+            ObjectType oType = entry.getValue();
+            MethodSpec.Builder constructor = MethodSpec.constructorBuilder().addModifiers(Modifier.PROTECTED);
+            List<ParameterSpec> constructorParams = new ArrayList<>();
+            List<FieldSpec> classFields = new ArrayList<>();
+
+            if (!oType.getType().equals("top level")) {
+                Pair<String, String> path = splitClasspath(this.baseBuilderClass);
+                ClassName parameterizedTypeName = ClassName.get(path.getLeft(), path.getRight());
+                constructorParams.add(ParameterSpec.builder(parameterizedTypeName, "parentObj").build());
+                classFields.add(FieldSpec.builder(parameterizedTypeName, "parentObj")
+                        .addModifiers(Modifier.PRIVATE, Modifier.FINAL).build());
+            }
+            List<ParameterSpec> typeParams = new ArrayList<>();
+
+            for (ObjectField oF : oType.getFields()) {
+                if (oF.getType().equals("string")) {
+                    typeParams.add(ParameterSpec.builder(String.class, lowerCamel(makeValidJavaVariable(oF.getName())))
+                            .build());
+                    classFields.add(FieldSpec.builder(String.class, lowerCamel(makeValidJavaVariable(oF.getName())))
+                            .addModifiers(Modifier.PRIVATE, Modifier.FINAL).build());
+                } else if (oF.getType().equals("integer")) {
+                    typeParams.add(
+                            ParameterSpec.builder(int.class, lowerCamel(makeValidJavaVariable(oF.getName()))).build());
+                    classFields.add(FieldSpec.builder(int.class, lowerCamel(makeValidJavaVariable(oF.getName())))
+                            .addModifiers(Modifier.PRIVATE, Modifier.FINAL).build());
+                }
+            }
+            constructorParams.addAll(typeParams);
+            constructor.addParameters(constructorParams);
+            for (ParameterSpec p : constructorParams) {
+                constructor.addStatement("this.$L = $L", p.name, p.name);
+
+            }
+            List<MethodSpec> methods = new ArrayList<>();
+            methods.add(constructor.build());
+
+            methods.addAll(createChildMethods(oType));
+
+            methods.addAll(createInterfaceMethods(oType, typeParams));
+
+            ClassName superType = null;
+            if (oType.getType().equals("top level")) {
+                Pair<String, String> path = splitClasspath(this.topLevelBuilderClass);
+                superType = ClassName.get(path.getLeft(), path.getRight());
+            } else {
+                if (oType.getType().equals("singular")) {
+                    Pair<String, String> path = splitClasspath(this.singularBuilderClass);
+                    superType = ClassName.get(path.getLeft(), path.getRight());
+
+                } else if (oType.getType().equals("plural")) {
+                    Pair<String, String> path = splitClasspath(this.pluralBuilderClass);
+                    superType = ClassName.get(path.getLeft(), path.getRight());
+                }
+            }
+
+            TypeSpec type = TypeSpec.classBuilder(upperCamel(key)).addModifiers(Modifier.PUBLIC, Modifier.FINAL)
+                    .addType(createInnerInfoClass(oType)).addSuperinterface(superType).addFields(classFields)
+                    .addMethods(methods).build();
+
+            files.add(JavaFile.builder(CLASSPATH, type).build());
+
+        }
+
+        files.add(createBuilderClass());
+
+        files.stream().forEach(javaFile -> {
+            try {
+                javaFile.writeTo(Paths.get(location, "fluent"));
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        });
+
+    }
+
+    protected List<MethodSpec> createInterfaceMethods(ObjectType oType, List<ParameterSpec> typeParams) {
+
+        List<MethodSpec> methods = new ArrayList<>();
+
+        CodeBlock.Builder uriTemplateCodeBlock = CodeBlock.builder();
+        if (!oType.getType().equals("top level")) {
+            uriTemplateCodeBlock.add("return this.parentObj.uriTemplate() + Info.partialUri");
+        } else {
+            uriTemplateCodeBlock.add("return Info.partialUri");
+
+        }
+        methods.add(MethodSpec.methodBuilder("uriTemplate").returns(String.class).addModifiers(Modifier.PUBLIC)
+                .addStatement(uriTemplateCodeBlock.build()).addAnnotation(Override.class).build());
+
+        ClassName arrayUtils = ClassName.get(ArrayUtils.class);
+
+        CodeBlock.Builder valuesReturn = CodeBlock.builder();
+
+        if (oType.getType().equals("top level")) {
+            valuesReturn.add("return new Object[0]");
+        } else {
+            if (!typeParams.isEmpty()) {
+                valuesReturn.add("return $T.addAll(this.parentObj.values(), $L)", arrayUtils, String.join(", ",
+                        typeParams.stream().map(item -> "this." + item.name).collect(Collectors.toList())));
+            } else {
+                valuesReturn.add("return this.parentObj.values()");
+            }
+        }
+        methods.add(MethodSpec.methodBuilder("values").returns(Object[].class).addModifiers(Modifier.PUBLIC)
+                .addAnnotation(Override.class).addStatement(valuesReturn.build()).build());
+
+        if (!oType.getType().equals("top level")) {
+            ClassName returnType = null;
+            CodeBlock.Builder block = CodeBlock.builder();
+            if (oType.getType().equals("singular")) {
+                Pair<String, String> path = splitClasspath(this.singularClass);
+                returnType = ClassName.get(path.getLeft(), path.getRight());
+                block.add("return new $T(this.parentObj.uriTemplate(), Info.partialUri, Info.name, false)", returnType);
+            } else if (oType.getType().equals("plural")) {
+                Pair<String, String> path = splitClasspath(this.pluralClass);
+                returnType = ClassName.get(path.getLeft(), path.getRight());
+                block.add("return new $T(Info.name, this.parentObj.uriTemplate(), Info.partialUri)", returnType);
+            }
+
+            methods.add(MethodSpec.methodBuilder("build").returns(returnType).addModifiers(Modifier.PUBLIC)
+                    .addAnnotation(Override.class).addStatement(block.build()).build());
+
+        }
+
+        return methods;
+    }
+
+    protected List<MethodSpec> createChildMethods(ObjectType oType) {
+        List<MethodSpec> methods = new ArrayList<>();
+        for (String child : oType.getChildren()) {
+            methods.add(createAccessMethod(doc.get(child), true, false));
+        }
+
+        return methods;
+    }
+
+    protected MethodSpec createAccessMethod(ObjectType oType, boolean isChild, boolean isStatic) {
+
+        ClassName childClass = ClassName.get(CLASSPATH, upperCamel(oType.getName()));
+        MethodSpec.Builder b = MethodSpec.methodBuilder(lowerCamel(oType.getName())).returns(childClass);
+        List<Modifier> modifiers = new ArrayList<>();
+        if (isStatic) {
+            modifiers.add(Modifier.STATIC);
+        }
+        modifiers.add(Modifier.PUBLIC);
+        b.addModifiers(modifiers);
+        List<ParameterSpec> params = new ArrayList<>();
+        for (ObjectField oF : doc.get(oType.getName()).getFields()) {
+            if (oF.getType().equals("string")) {
+                params.add(
+                        ParameterSpec.builder(String.class, lowerCamel(makeValidJavaVariable(oF.getName()))).build());
+            } else if (oF.getType().equals("integer")) {
+                params.add(ParameterSpec.builder(int.class, lowerCamel(makeValidJavaVariable(oF.getName()))).build());
+            }
+        }
+        List<String> paramNames = params.stream().map(item -> item.name).collect(Collectors.toList());
+        if (isChild) {
+            paramNames.add(0, "this");
+        }
+        b.addParameters(params).addStatement("return new $T($L)", childClass, String.join(", ", paramNames));
+
+        return b.build();
+    }
+
+    protected JavaFile createBuilderClass() {
+
+        List<MethodSpec> methods = doc.values().stream().filter(item -> item.getType().equals("top level"))
+                .map(item -> createAccessMethod(item, false, true)).collect(Collectors.toList());
+
+        TypeSpec type = TypeSpec.classBuilder(this.builderName).addModifiers(Modifier.PUBLIC, Modifier.FINAL)
+                .addMethods(methods).addType(createTypes()).build();
+
+        return JavaFile.builder(CLASSPATH, type).build();
+
+    }
+
+    protected TypeSpec createTypes() {
+        Pair<String, String> path = splitClasspath(this.nameClass);
+        ClassName nameType = ClassName.get(path.getLeft(), path.getRight());
+
+        List<FieldSpec> params =
+                doc.values().stream().filter(item -> item.getType().equals("singular"))
+                        .sorted(Comparator
+                                .comparing(item -> item.getName()))
+                        .map(item -> FieldSpec
+                                .builder(nameType,
+                                        CaseFormat.LOWER_HYPHEN.to(CaseFormat.UPPER_UNDERSCORE, item.getName()),
+                                        Modifier.PUBLIC, Modifier.STATIC, Modifier.FINAL)
+                                .initializer("new $T($S)", nameType, item.getName()).build())
+                        .collect(Collectors.toList());
+
+        TypeSpec type = TypeSpec.classBuilder("Types").addModifiers(Modifier.PUBLIC, Modifier.FINAL, Modifier.STATIC)
+                .addFields(params).build();
+
+        return type;
+
+    }
+
+    protected TypeSpec createInnerInfoClass(ObjectType oType) {
+        List<FieldSpec> classFields = new ArrayList<>();
+        List<MethodSpec> methods = new ArrayList<>();
+
+        classFields.add(FieldSpec.builder(String.class, "partialUri")
+                .addModifiers(Modifier.PRIVATE, Modifier.FINAL, Modifier.STATIC)
+                .initializer("$S", oType.getPartialUri()).build());
+
+        classFields.add(FieldSpec.builder(ParameterizedTypeName.get(List.class, String.class), "paths")
+                .addModifiers(Modifier.PRIVATE, Modifier.FINAL, Modifier.STATIC)
+                .initializer("$T.asList($L)", ClassName.get(Arrays.class),
+                        "\"" + oType.getPaths().stream().collect(Collectors.joining("\", \"")) + "\"")
+                .build());
+
+        ClassName superInterface;
+        if (oType.getType().equals("plural")) {
+            classFields.add(FieldSpec.builder(String.class, "name")
+                    .addModifiers(Modifier.PRIVATE, Modifier.FINAL, Modifier.STATIC)
+                    .initializer("$S", oType.getAdditionalName()).build());
+            superInterface = ClassName.get(this.pluralBuilderClass, "Info");
+        } else if (oType.getType().equals("singular")) {
+            classFields.add(FieldSpec.builder(String.class, "name")
+                    .addModifiers(Modifier.PRIVATE, Modifier.FINAL, Modifier.STATIC).initializer("$S", oType.getName())
+                    .build());
+            superInterface = ClassName.get(this.singularBuilderClass, "Info");
+        } else {
+            superInterface = ClassName.get(this.topLevelBuilderClass, "Info");
+        }
+        methods.add(MethodSpec.methodBuilder("getPaths").returns(ParameterizedTypeName.get(List.class, String.class))
+                .addModifiers(Modifier.PUBLIC).addAnnotation(Override.class).addStatement("return Info.paths").build());
+        methods.add(MethodSpec.methodBuilder("getPartialUri").returns(String.class).addModifiers(Modifier.PUBLIC)
+                .addAnnotation(Override.class).addStatement("return Info.partialUri").build());
+        if (!oType.getType().equals("top level")) {
+            methods.add(MethodSpec.methodBuilder("getName").returns(String.class).addModifiers(Modifier.PUBLIC)
+                    .addAnnotation(Override.class).addStatement("return Info.name").build());
+        }
+        return TypeSpec.classBuilder("Info").addModifiers(Modifier.PUBLIC, Modifier.STATIC)
+                .addSuperinterface(superInterface).addFields(classFields).addMethods(methods).build();
+
+    }
+
+    protected String makeValidJavaVariable(String name) {
+
+        return name.replace(".", "_");
+    }
+
+    protected Pair<String, String> splitClasspath(String path) {
+
+        return Pair.of(path.substring(0, path.lastIndexOf(".")),
+                path.substring(path.lastIndexOf(".") + 1, path.length()));
+    }
+
+    protected String lowerCamel(String s) {
+        return CaseFormat.LOWER_HYPHEN.to(CaseFormat.LOWER_CAMEL, s);
+    }
+
+    protected String upperCamel(String s) {
+        return CaseFormat.LOWER_HYPHEN.to(CaseFormat.UPPER_CAMEL, s);
+    }
+
+}
diff --git a/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/FluentGeneratorMojo.java b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/FluentGeneratorMojo.java
new file mode 100644
index 0000000000..9de249faa2
--- /dev/null
+++ b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/FluentGeneratorMojo.java
@@ -0,0 +1,53 @@
+package org.onap.graphinventory.generate;
+
+import java.io.IOException;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugins.annotations.LifecyclePhase;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+@Mojo(name = "generate-builders", defaultPhase = LifecyclePhase.GENERATE_SOURCES)
+public class FluentGeneratorMojo extends AbstractMojo {
+
+    @Parameter
+    private String destination;
+    @Parameter
+    private String destinationClasspath;
+    @Parameter
+    private String builderName;
+    @Parameter
+    private String swaggerLocation;
+    @Parameter
+    private String singularBuilderClass;
+    @Parameter
+    private String pluralBuilderClass;
+    @Parameter
+    private String topLevelBuilderClass;
+    @Parameter
+    private String baseBuilderClass;
+    @Parameter
+    private String singularClass;
+    @Parameter
+    private String pluralClass;
+    @Parameter
+    private String nameClass;
+
+    public void execute() throws MojoExecutionException, MojoFailureException {
+
+        try {
+            new FluentGenerator(getLog(), destination, destinationClasspath, swaggerLocation, builderName,
+                    singularBuilderClass, pluralBuilderClass, topLevelBuilderClass, baseBuilderClass, singularClass,
+                    pluralClass, nameClass).run();
+        } catch (JsonProcessingException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        } catch (IOException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
+
+    }
+}
diff --git a/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/ObjectField.java b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/ObjectField.java
new file mode 100644
index 0000000000..7c93804bd1
--- /dev/null
+++ b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/ObjectField.java
@@ -0,0 +1,26 @@
+package org.onap.graphinventory.generate;
+
+public class ObjectField {
+
+
+    private String name;
+    private String type;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+
+}
diff --git a/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/ObjectType.java b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/ObjectType.java
new file mode 100644
index 0000000000..3e7f7dcd46
--- /dev/null
+++ b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/ObjectType.java
@@ -0,0 +1,91 @@
+package org.onap.graphinventory.generate;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class ObjectType {
+
+    private List<String> paths = new ArrayList<>();
+
+    private Set<String> children = new HashSet<>();
+
+    private String name;
+
+    private String additionalName;
+
+    private String topLevel;
+
+    private String type;
+
+    private String partialUri;
+
+    private List<ObjectField> fields = new ArrayList<>();
+
+    public List<String> getPaths() {
+        return paths;
+    }
+
+    public void setPaths(List<String> paths) {
+        this.paths = paths;
+    }
+
+    public String getTopLevel() {
+        return topLevel;
+    }
+
+    public void setTopLevel(String topLevel) {
+        this.topLevel = topLevel;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public List<ObjectField> getFields() {
+        return fields;
+    }
+
+    public void setFields(List<ObjectField> fields) {
+        this.fields = fields;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Set<String> getChildren() {
+        return children;
+    }
+
+    public void setChildren(Set<String> children) {
+        this.children = children;
+    }
+
+    public String getPartialUri() {
+        return partialUri;
+    }
+
+    public void setPartialUri(String partialUri) {
+        this.partialUri = partialUri;
+    }
+
+    public String getAdditionalName() {
+        return additionalName;
+    }
+
+    public void setAdditionalName(String additionalName) {
+        this.additionalName = additionalName;
+    }
+
+
+}
diff --git a/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/SwaggerConverter.java b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/SwaggerConverter.java
new file mode 100644
index 0000000000..b3ced65390
--- /dev/null
+++ b/graph-inventory/fluent-builder-maven-plugin/src/main/java/org/onap/graphinventory/generate/SwaggerConverter.java
@@ -0,0 +1,176 @@
+package org.onap.graphinventory.generate;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import org.apache.maven.plugin.logging.Log;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.swagger.models.Path;
+import io.swagger.models.Swagger;
+import io.swagger.models.parameters.Parameter;
+import io.swagger.models.parameters.SerializableParameter;
+import io.swagger.parser.SwaggerParser;
+
+public class SwaggerConverter {
+
+    private final Log log;
+
+    public SwaggerConverter(Log log) {
+        this.log = log;
+    }
+
+    public Map<String, ObjectType> getDoc(String swaggerLocation) throws JsonProcessingException {
+        Swagger swagger = new SwaggerParser().read(swaggerLocation);
+
+        Map<String, Path> paths = swagger.getPaths().entrySet().stream()
+                .filter(item -> !item.getKey().endsWith("/relationship-list/relationship"))
+                .collect(Collectors.toMap(item -> item.getKey(), item -> item.getValue()));
+
+        Pattern pluralPattern = Pattern.compile(".*(?<partial>/(?<name>[^{]*$))");
+        Pattern singularPattern = Pattern.compile(".*(?<partial>/(?<name>[^/{}]*)/\\{.*$)");
+        Pattern topLevelPattern = Pattern.compile("^/([^/]+)/.*");
+        Pattern urlTemplatePattern = Pattern.compile("\\{([^}]+)\\}");
+        Matcher pluralMatcher;
+        Matcher singularMatcher;
+        Matcher topLevelMatcher;
+
+        Map<String, ObjectType> output = new HashMap<>();
+        for (Map.Entry<String, Path> entry : paths.entrySet()) {
+
+            pluralMatcher = pluralPattern.matcher(entry.getKey());
+            singularMatcher = singularPattern.matcher(entry.getKey());
+            topLevelMatcher = topLevelPattern.matcher(entry.getKey());
+            ObjectType item;
+            if (pluralMatcher.matches()) {
+                if (!output.containsKey(pluralMatcher.group("name"))) {
+                    output.put(pluralMatcher.group("name"), new ObjectType());
+                }
+                item = output.get(pluralMatcher.group("name"));
+                item.setType("plural");
+                item.setName(pluralMatcher.group("name"));
+                item.setPartialUri(pluralMatcher.group("partial"));
+                item.getPaths().add(entry.getKey());
+
+                if (topLevelMatcher.matches()) {
+                    item.setTopLevel(topLevelMatcher.group(1));
+                    if (!output.containsKey(topLevelMatcher.group(1))) {
+                        output.put(topLevelMatcher.group(1), new ObjectType());
+                        output.get(topLevelMatcher.group(1)).setType("top level");
+                        output.get(topLevelMatcher.group(1)).setName(topLevelMatcher.group(1));
+                        output.get(topLevelMatcher.group(1)).setPartialUri("/" + topLevelMatcher.group(1));
+                        output.get(topLevelMatcher.group(1)).getPaths().add("/" + topLevelMatcher.group(1));
+
+                    }
+                }
+            } else if (singularMatcher.matches()) {
+
+                if (!output.containsKey(singularMatcher.group("name"))) {
+                    output.put(singularMatcher.group("name"), new ObjectType());
+
+                    item = output.get(singularMatcher.group("name"));
+
+                    item.setType("singular");
+                    item.setName(singularMatcher.group("name"));
+                    item.setPartialUri(singularMatcher.group("partial"));
+
+                    item.getPaths().add(entry.getKey());
+
+                    if (topLevelMatcher.matches()) {
+                        item.setTopLevel(topLevelMatcher.group(1));
+                        if (!output.containsKey(topLevelMatcher.group(1))) {
+                            output.put(topLevelMatcher.group(1), new ObjectType());
+                            output.get(topLevelMatcher.group(1)).setType("top level");
+                            output.get(topLevelMatcher.group(1)).setName(topLevelMatcher.group(1));
+                            output.get(topLevelMatcher.group(1)).setPartialUri("/" + topLevelMatcher.group(1));
+                            output.get(topLevelMatcher.group(1)).getPaths().add("/" + topLevelMatcher.group(1));
+                        }
+                    }
+                    List<Parameter> parameters = entry.getValue().getGet().getParameters();
+
+                    if (parameters != null) {
+                        parameters.stream().filter(param -> "path".equals(param.getIn())).collect(Collectors.toList());
+                    }
+                    for (Parameter p : parameters) {
+                        ObjectField field = new ObjectField();
+
+                        field.setName(p.getName());
+                        field.setType(((SerializableParameter) p).getType());
+                        item.getFields().add(field);
+                    }
+
+                } else {
+                    item = output.get(singularMatcher.group("name"));
+                    if (singularMatcher.group("partial").contains(item.getName() + ".")) {
+                        item.setPartialUri(singularMatcher.group("partial"));
+                    }
+                    item.getPaths().add(entry.getKey());
+                }
+            }
+
+        }
+        ObjectMapper mapper = new ObjectMapper();
+
+        for (ObjectType item : output.values()) {
+            for (String path : item.getPaths()) {
+                String partialUriReplacer = item.getPartialUri().replaceAll("\\{[^}]+\\}", "[^/]+");
+                String childParentUri = path.replaceFirst(partialUriReplacer + "$", "");
+                for (ObjectType itemToUpdate : output.values()) {
+                    if (itemToUpdate.getPaths().stream()
+                            .anyMatch(itemToUpdateUri -> itemToUpdateUri.equals(childParentUri))) {
+                        itemToUpdate.getChildren().add(item.getName());
+                    }
+                }
+            }
+        }
+
+        log.debug(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(output));
+
+        for (Map.Entry<String, ObjectType> item : output.entrySet()) {
+
+            if (item.getValue().getType().equals("plural")) {
+                Set<String> children = item.getValue().getChildren();
+                // should only be one
+                if (!children.isEmpty()) {
+                    item.getValue().setAdditionalName(children.iterator().next());
+                }
+            }
+            Set<String> pluralChildren = new HashSet<>();
+            for (String child : item.getValue().getChildren()) {
+                if (output.get(child).getType().equals("plural")) {
+                    Set<String> children = output.get(child).getChildren();
+                    pluralChildren.addAll(children);
+                }
+            }
+            item.getValue().getChildren().addAll(pluralChildren);
+
+            if (item.getValue().getType().equals("plural")) {
+                for (String child : item.getValue().getChildren()) {
+                    output.get(child)
+                            .setPartialUri(item.getValue().getPartialUri() + output.get(child).getPartialUri());
+                }
+            }
+
+            if (!item.getValue().getFields().isEmpty()) {
+                Matcher templates = urlTemplatePattern.matcher(item.getValue().getPartialUri());
+                List<String> localFields = new ArrayList<>();
+                while (templates.find()) {
+                    localFields.add(templates.group(1));
+                }
+                item.getValue().setFields(item.getValue().getFields().stream()
+                        .filter(f -> localFields.contains(f.getName())).collect(Collectors.toList()));
+            }
+        }
+
+        output.values().stream().filter(item -> item.getType().equals("plural"))
+                .forEach(item -> item.getChildren().clear());
+
+        return output;
+    }
+}