[ONOS-4073] YANG enum translator implementation.

Change-Id: I129eaec0c8f81c674a994a579650f18499340052

@@ -35,6 +35,7 @@ import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaAugment;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaCase;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaChoice;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaContainer;
+import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaEnumeration;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaGrouping;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaLeaf;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaList;
@@ -346,4 +347,22 @@ public final class YangDataModelFactory {
             }
         }
     }
+
+    /**
+     * Returns based on the target language generate the inherited data model node.
+     *
+     * @param targetLanguage target language in which YANG mapping needs to be
+     *            generated
+     * @return the corresponding inherited node based on the target language
+     */
+    public static YangJavaEnumeration getYangEnumerationNode(GeneratedLanguage targetLanguage) {
+        switch (targetLanguage) {
+            case JAVA_GENERATION: {
+                return new YangJavaEnumeration();
+            }
+            default: {
+                throw new TranslatorException("Only YANG to Java is supported.");
+            }
+        }
+    }
 }

@@ -55,6 +55,8 @@ import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.TreeWalkListener;
 import org.onosproject.yangutils.utils.YangConstructType;
 
+import static org.onosproject.yangutils.datamodel.utils.GeneratedLanguage.JAVA_GENERATION;
+import static org.onosproject.yangutils.datamodel.utils.YangDataModelFactory.getYangEnumerationNode;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.EXIT;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructExtendedListenerErrorMessage;
@@ -99,7 +101,7 @@ public final class EnumerationListener {
         checkStackIsNotEmpty(listener, MISSING_HOLDER, ENUMERATION_DATA, "", ENTRY);
 
         if (listener.getParsedDataStack().peek() instanceof YangType) {
-            YangEnumeration enumerationNode = new YangEnumeration();
+            YangEnumeration enumerationNode = getYangEnumerationNode(JAVA_GENERATION);
             Parsable typeData = listener.getParsedDataStack().pop();
 
             // Check for stack to be non empty.

@@ -57,6 +57,11 @@ public final class GeneratedJavaFileType {
     public static final int GENERATE_UNION_CLASS = 32;
 
     /**
+     * Java class corresponding to YANG enumeration.
+     */
+    public static final int GENERATE_ENUM_CLASS = 64;
+
+    /**
      * Creates an instance of generate java file type.
      */
     private GeneratedJavaFileType() {

@@ -82,6 +82,11 @@ public final class GeneratedTempFileType {
     public static final int UNION_FROM_STRING_IMPL_MASK = 2048;
 
     /**
+     * Enum implementation of class.
+     */
+    public static final int ENUM_IMPL_MASK = 4096;
+
+    /**
      * Creates an instance of generated temp file type.
      */
     private GeneratedTempFileType() {

@@ -124,6 +124,29 @@ public final class JavaAttributeInfo {
     }
 
     /**
+     * Creates an attribute info object corresponding to the passed enumeration attribute
+     * information and return it.
+     *
+     * @param curNode current data model node for which the java file is being
+     *            generated
+     * @param attributeName attribute name
+     * @return AttributeInfo attribute details required to add in temporary
+     *         files
+     */
+    public static JavaAttributeInfo getAttributeInfoOfEnumAttribute(YangNode curNode, String attributeName) {
+
+        String curNodeName = ((HasJavaFileInfo) curNode).getJavaFileInfo().getJavaName();
+
+        /*
+         * Get the import info corresponding to the attribute for import in
+         * generated java files or qualified access
+         */
+        JavaQualifiedTypeInfo qualifiedTypeInfo = getQualifiedTypeInfoOfCurNode(curNode,
+                curNodeName, false);
+
+        return getAttributeInfoForTheData(qualifiedTypeInfo, attributeName, null, curNode, false);
+    }
+    /**
      * Returns the data type info of attribute.
      *
      * @return the data type info of attribute

@@ -20,7 +20,11 @@ import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
+
 import org.onosproject.yangutils.datamodel.HasType;
+import org.onosproject.yangutils.datamodel.YangEnum;
+import org.onosproject.yangutils.datamodel.YangEnumeration;
 import org.onosproject.yangutils.datamodel.YangLeaf;
 import org.onosproject.yangutils.datamodel.YangLeafList;
 import org.onosproject.yangutils.datamodel.YangLeavesHolder;
@@ -28,8 +32,10 @@ import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.datamodel.YangType;
 import org.onosproject.yangutils.translator.exception.TranslatorException;
 
+import static org.onosproject.yangutils.datamodel.YangNodeType.MODULE_NODE;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_INTERFACE_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_ENUM_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_TYPEDEF_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.IMPL_CLASS_MASK;
@@ -37,6 +43,7 @@ import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.ATTRIBUTES_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.CONSTRUCTOR_FOR_TYPE_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.CONSTRUCTOR_IMPL_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.ENUM_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EQUALS_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.GETTER_FOR_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.GETTER_FOR_INTERFACE_MASK;
@@ -46,14 +53,17 @@ import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.SETTER_FOR_INTERFACE_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.TO_STRING_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.UNION_FROM_STRING_IMPL_MASK;
+import static org.onosproject.yangutils.translator.tojava.JavaAttributeInfo.getAttributeInfoOfEnumAttribute;
 import static org.onosproject.yangutils.translator.tojava.JavaAttributeInfo.getAttributeInfoOfLeaf;
 import static org.onosproject.yangutils.translator.tojava.JavaAttributeInfo.getAttributeInfoOfType;
 import static org.onosproject.yangutils.translator.tojava.JavaAttributeInfo.getCurNodeAsAttributeInParent;
 import static org.onosproject.yangutils.translator.tojava.JavaAttributeInfo.getFromStringAttributeInfo;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaCodeSnippetGen.generateEnumAttributeString;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaCodeSnippetGen.getJavaAttributeDefination;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaCodeSnippetGen.getJavaClassDefClose;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateBuilderClassFile;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateBuilderInterfaceFile;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateEnumClassFile;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateImplClassFile;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateInterfaceFile;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateTypeDefClassFile;
@@ -94,13 +104,14 @@ import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATI
 import static org.onosproject.yangutils.utils.UtilConstants.IMPL;
 import static org.onosproject.yangutils.utils.UtilConstants.INTERFACE;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
+import static org.onosproject.yangutils.utils.UtilConstants.PACKAGE_INFO_JAVADOC_OF_CHILD;
 import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
 import static org.onosproject.yangutils.utils.UtilConstants.SLASH;
 import static org.onosproject.yangutils.utils.io.impl.FileSystemUtil.createPackage;
 import static org.onosproject.yangutils.utils.io.impl.FileSystemUtil.readAppendFile;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.GETTER_METHOD;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.OF_METHOD;
-import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
 import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.clean;
 import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.insertDataIntoJavaFile;
 import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.mergeJavaFiles;
@@ -203,6 +214,11 @@ public class TempJavaCodeFragmentFiles {
     private static final String OF_STRING_METHOD_FILE_NAME = "OfString";
 
     /**
+     * File name for temporary enum class.
+     */
+    private static final String ENUM_CLASS_TEMP_FILE_NAME = "EnumClass";
+
+    /**
      * File name for construction for special type like union, typedef.
      */
     private static final String CONSTRUCTOR_FOR_TYPE_FILE_NAME = "ConstructorForType";
@@ -238,6 +254,11 @@ public class TempJavaCodeFragmentFiles {
     private static final String TYPEDEF_CLASS_FILE_NAME_SUFFIX = EMPTY_STRING;
 
     /**
+     * File name for enum class file name suffix.
+     */
+    private static final String ENUM_CLASS_FILE_NAME_SUFFIX = EMPTY_STRING;
+
+    /**
      * File name for generated class file for special type like union, typedef suffix.
      */
     private static final String UNION_TYPE_CLASS_FILE_NAME_SUFFIX = EMPTY_STRING;
@@ -318,6 +339,11 @@ public class TempJavaCodeFragmentFiles {
     private File toStringImplTempFileHandle;
 
     /**
+     * Temporary file handle for enum class file.
+     */
+    private File enumClassTempFileHandle;
+
+    /**
      * Temporary file handle for of string method of class.
      */
     private File ofStringImplTempFileHandle;
@@ -343,10 +369,20 @@ public class TempJavaCodeFragmentFiles {
     private YangNode curYangNode;
 
     /**
+     * Current enum's value.
+     */
+    private int enumValue;
+
+    /**
      * Is attribute added.
      */
     private boolean isAttributePresent = false;
 
+    /*
+     * Java file handle for enum class.
+      */
+    private File enumClassJavaFileHandle;
+
     /**
      * Creates an instance of temporary java code fragment.
      *
@@ -432,7 +468,16 @@ public class TempJavaCodeFragmentFiles {
             generatedTempFiles |= TO_STRING_IMPL_MASK;
             generatedTempFiles |= UNION_FROM_STRING_IMPL_MASK;
         }
+        /**
+         * Initialize enum when generation file type matches to enum class mask.
+         */
+        if ((genFileType & GENERATE_ENUM_CLASS) != 0) {
+            generatedTempFiles |= ENUM_IMPL_MASK;
+        }
 
+        /**
+         * Set temporary file handles.
+         */
         if ((generatedTempFiles & ATTRIBUTES_MASK) != 0) {
             setAttributesTempFileHandle(getTemporaryFileHandle(ATTRIBUTE_FILE_NAME));
         }
@@ -467,7 +512,9 @@ public class TempJavaCodeFragmentFiles {
         if ((generatedTempFiles & TO_STRING_IMPL_MASK) != 0) {
             setToStringImplTempFileHandle(getTemporaryFileHandle(TO_STRING_METHOD_FILE_NAME));
         }
-
+        if ((generatedTempFiles & ENUM_IMPL_MASK) != 0) {
+            setEnumClassTempFileHandle(getTemporaryFileHandle(ENUM_CLASS_TEMP_FILE_NAME));
+        }
         if ((generatedTempFiles & OF_STRING_IMPL_MASK) != 0) {
             setOfStringImplTempFileHandle(getTemporaryFileHandle(OF_STRING_METHOD_FILE_NAME));
         }
@@ -572,6 +619,25 @@ public class TempJavaCodeFragmentFiles {
     }
 
     /**
+     * Returns enum class java file handle.
+     *
+     * @return enum class java file handle
+     */
+    private File getEnumClassJavaFileHandle() {
+        return enumClassJavaFileHandle;
+    }
+
+    /**
+     * Sets enum class java file handle.
+     *
+     * @param enumClassJavaFileHandle enum class java file handle
+     */
+
+    private void setEnumClassJavaFileHandle(File enumClassJavaFileHandle) {
+        this.enumClassJavaFileHandle = enumClassJavaFileHandle;
+    }
+
+    /**
      * Returns java file handle for type class file.
      *
      * @return java file handle for type class file
@@ -752,6 +818,25 @@ public class TempJavaCodeFragmentFiles {
     }
 
     /**
+     * Returns temporary file handle for enum class file.
+     *
+     * @return temporary file handle for enum class file
+     */
+    public File getEnumClassTempFileHandle() {
+        return enumClassTempFileHandle;
+    }
+
+    /**
+     * Sets temporary file handle for enum class file.
+     *
+     * @param enumClassTempFileHandle temporary file handle for enum class file
+     */
+
+    private void setEnumClassTempFileHandle(File enumClassTempFileHandle) {
+        this.enumClassTempFileHandle = enumClassTempFileHandle;
+    }
+
+    /**
      * Returns of string method's temporary file handle.
      *
      * @return of string method's temporary file handle
@@ -846,6 +931,24 @@ public class TempJavaCodeFragmentFiles {
     }
 
     /**
+     * Returns enum's value.
+     *
+     * @return enum's value
+     */
+    public int getEnumValue() {
+        return enumValue;
+    }
+
+    /**
+     * Sets enum's value.
+     *
+     * @param enumValue enum's value
+     */
+    public void setEnumValue(int enumValue) {
+        this.enumValue = enumValue;
+    }
+
+    /**
      * Returns list of classes to be extended by generated files.
      *
      * @return list of classes to be extended by generated files
@@ -1038,6 +1141,17 @@ public class TempJavaCodeFragmentFiles {
     }
 
     /**
+     * Adds enum class attributes to temporary file.
+     *
+     * @param curEnum current YANG enum
+     * @throws IOException when fails to do IO operations.
+     */
+    private void addAttributesForEnumClass(JavaAttributeInfo curEnumInfo) throws IOException {
+        appendToFile(getEnumClassTempFileHandle(),
+                generateEnumAttributeString(curEnumInfo.getAttributeName(), getEnumValue()));
+    }
+
+    /**
      * Add from string method for union class.
      *
      * @param javaAttributeInfo       type attribute info
@@ -1080,7 +1194,6 @@ public class TempJavaCodeFragmentFiles {
      * @throws IOException when fails to create new file handle
      */
     private File getJavaFileHandle(String fileName) throws IOException {
-        createPackage(absoluteDirPath, getJavaFileInfo().getJavaName());
         return getFileObject(getDirPath(), fileName, JAVA_FILE_EXTENSION, getJavaFileInfo());
     }
 
@@ -1271,6 +1384,26 @@ public class TempJavaCodeFragmentFiles {
     }
 
     /**
+     * Adds enum attributes to temporary files.
+     *
+     * @param curNode current YANG node
+     * @throws IOException when fails to do IO operations
+     */
+    public void addEnumAttributeToTempFiles(YangNode curNode) throws IOException {
+
+        if (curNode instanceof YangEnumeration) {
+            Set<YangEnum> enumSet = ((YangEnumeration) curNode).getEnumSet();
+            for (YangEnum curEnum : enumSet) {
+                JavaAttributeInfo javaAttributeInfo = getAttributeInfoOfEnumAttribute(curNode, curEnum.getNamedValue());
+                setEnumValue(curEnum.getValue());
+                addJavaSnippetInfoToApplicableTempFiles(javaAttributeInfo);
+            }
+        } else {
+            throw new TranslatorException("curnode should be of type enum.");
+        }
+    }
+
+    /**
      * Adds the new attribute info to the target generated temporary files for union class.
      *
      * @param hasType           the node for which the type is being added as an attribute
@@ -1337,6 +1470,10 @@ public class TempJavaCodeFragmentFiles {
                 addToStringMethod(newAttrInfo);
             }
 
+            if ((generatedTempFiles & ENUM_IMPL_MASK) != 0) {
+                addAttributesForEnumClass(newAttrInfo);
+            }
+
             if ((generatedTempFiles & OF_STRING_IMPL_MASK) != 0) {
                 addOfStringMethod(newAttrInfo);
             }
@@ -1395,7 +1532,12 @@ public class TempJavaCodeFragmentFiles {
          * Prepares java file generator for extends list.
          */
         prepareJavaFileGeneratorForExtendsList(getExtendsList());
-
+        if (curNode.getNodeType().equals(MODULE_NODE)) {
+            createPackage(absoluteDirPath, getJavaFileInfo().getJavaName());
+        } else {
+            createPackage(absoluteDirPath, ((HasJavaFileInfo) curNode.getParent()).getJavaFileInfo().getJavaName()
+                    + PACKAGE_INFO_JAVADOC_OF_CHILD);
+        }
         /**
          * Generate java code.
          */
@@ -1492,6 +1634,14 @@ public class TempJavaCodeFragmentFiles {
         }
 
         /**
+         * Creates type enum class file.
+         */
+        if ((fileType & GENERATE_ENUM_CLASS) != 0) {
+            setEnumClassJavaFileHandle(getJavaFileHandle(getJavaClassName(ENUM_CLASS_FILE_NAME_SUFFIX)));
+            setEnumClassJavaFileHandle(generateEnumClassFile(getEnumClassJavaFileHandle(), curNode));
+        }
+
+        /**
          * Close all the file handles.
          */
         close(false);
@@ -1525,6 +1675,9 @@ public class TempJavaCodeFragmentFiles {
         if ((generatedJavaFiles & GENERATE_TYPEDEF_CLASS) != 0) {
             closeFile(getTypedefClassJavaFileHandle(), isError);
         }
+        if ((generatedJavaFiles & GENERATE_ENUM_CLASS) != 0) {
+            closeFile(getEnumClassJavaFileHandle(), isError);
+        }
         if ((generatedJavaFiles & GENERATE_UNION_CLASS) != 0) {
             closeFile(getTypeClassJavaFileHandle(), isError);
         }
@@ -1559,6 +1712,9 @@ public class TempJavaCodeFragmentFiles {
         if ((generatedTempFiles & EQUALS_IMPL_MASK) != 0) {
             closeFile(getEqualsImplTempFileHandle(), true);
         }
+        if ((generatedTempFiles & ENUM_IMPL_MASK) != 0) {
+            closeFile(getEnumClassTempFileHandle(), true);
+        }
         if ((generatedTempFiles & CONSTRUCTOR_FOR_TYPE_MASK) != 0) {
             closeFile(getConstructorForTypeTempFileHandle(), true);
         }

+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * 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.onosproject.yangutils.translator.tojava.javamodel;
+
+import java.io.IOException;
+
+import org.onosproject.yangutils.datamodel.YangEnumeration;
+import org.onosproject.yangutils.translator.exception.TranslatorException;
+import org.onosproject.yangutils.translator.tojava.JavaCodeGenerator;
+import org.onosproject.yangutils.translator.tojava.JavaFileInfo;
+import org.onosproject.yangutils.translator.tojava.JavaImportData;
+import org.onosproject.yangutils.translator.tojava.TempJavaCodeFragmentFiles;
+import org.onosproject.yangutils.translator.tojava.utils.YangPluginConfig;
+
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_ENUM_CLASS;
+import static org.onosproject.yangutils.translator.tojava.utils.YangJavaModelUtils.generateCodeOfType;
+
+/**
+ * Represents YANG java enumeration information extended to support java code generation.
+ */
+public class YangJavaEnumeration extends YangEnumeration implements JavaCodeGenerator, JavaCodeGeneratorInfo {
+
+    /**
+     * Contains the information of the java file being generated.
+     */
+    private JavaFileInfo javaFileInfo;
+
+    /**
+     * Contains information of the imports to be inserted in the java file
+     * generated.
+     */
+    private JavaImportData javaImportData;
+
+    /**
+     * File handle to maintain temporary java code fragments as per the code
+     * snippet types.
+     */
+    private TempJavaCodeFragmentFiles tempFileHandle;
+
+    /**
+     * Creates YANG java enumeration object.
+     */
+    public YangJavaEnumeration() {
+        super();
+        setJavaFileInfo(new JavaFileInfo());
+        setJavaImportData(new JavaImportData());
+        getJavaFileInfo().setGeneratedFileTypes(GENERATE_ENUM_CLASS);
+    }
+
+    /**
+     * Returns the generated java file information.
+     *
+     * @return generated java file information
+     */
+    @Override
+    public JavaFileInfo getJavaFileInfo() {
+
+        if (javaFileInfo == null) {
+            throw new TranslatorException("Missing java info in java datamodel node");
+        }
+        return javaFileInfo;
+    }
+
+    /**
+     * Sets the java file info object.
+     *
+     * @param javaInfo java file info object
+     */
+    @Override
+    public void setJavaFileInfo(JavaFileInfo javaInfo) {
+
+        javaFileInfo = javaInfo;
+    }
+
+    /**
+     * Returns the data of java imports to be included in generated file.
+     *
+     * @return data of java imports to be included in generated file
+     */
+    @Override
+    public JavaImportData getJavaImportData() {
+
+        return javaImportData;
+    }
+
+    /**
+     * Sets the data of java imports to be included in generated file.
+     *
+     * @param javaImportData data of java imports to be included in generated
+     *            file
+     */
+    @Override
+    public void setJavaImportData(JavaImportData javaImportData) {
+
+        this.javaImportData = javaImportData;
+    }
+
+    /**
+     * Returns the temporary file handle.
+     *
+     * @return temporary file handle
+     */
+    @Override
+    public TempJavaCodeFragmentFiles getTempJavaCodeFragmentFiles() {
+
+        return tempFileHandle;
+    }
+
+    /**
+     * Sets temporary file handle.
+     *
+     * @param fileHandle temporary file handle
+     */
+    @Override
+    public void setTempJavaCodeFragmentFiles(TempJavaCodeFragmentFiles fileHandle) {
+
+        tempFileHandle = fileHandle;
+    }
+
+    /**
+     * Prepare the information for java code generation corresponding to YANG
+     * enumeration info.
+     *
+     * @param yangPlugin YANG plugin config
+     * @throws IOException IO operations fails
+     */
+    @Override
+    public void generateCodeEntry(YangPluginConfig yangPlugin) throws IOException {
+        generateCodeOfType(this, yangPlugin, false);
+    }
+
+    /**
+     * Creates a java file using the YANG enumeration info.
+     *
+     * @throws IOException IO operation fail
+     */
+    @Override
+    public void generateCodeExit() throws IOException {
+        getTempJavaCodeFragmentFiles().generateJavaFile(GENERATE_ENUM_CLASS, this);
+    }
+
+}

@@ -18,6 +18,7 @@ package org.onosproject.yangutils.translator.tojava.utils;
 
 import org.onosproject.yangutils.datamodel.YangDataTypes;
 import org.onosproject.yangutils.datamodel.YangDerivedInfo;
+import org.onosproject.yangutils.datamodel.YangEnumeration;
 import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.datamodel.YangType;
 import org.onosproject.yangutils.datamodel.YangTypeDef;
@@ -25,6 +26,7 @@ import org.onosproject.yangutils.datamodel.YangUnion;
 import org.onosproject.yangutils.translator.exception.TranslatorException;
 import org.onosproject.yangutils.translator.tojava.HasJavaFileInfo;
 import org.onosproject.yangutils.translator.tojava.JavaFileInfo;
+import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaEnumeration;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaTypeDef;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaUnion;
 
@@ -186,7 +188,8 @@ public final class AttributesJavaDataType {
                 case BOOLEAN:
                     return BOOLEAN_WRAPPER;
                 case ENUMERATION:
-                    //TODO: ENUMERATION.
+                    return getCaptialCase(
+                            getCamelCase(((YangJavaEnumeration) yangType.getDataTypeExtendedInfo()).getName(), null));
                 case BITS:
                     //TODO:BITS
                 case BINARY:
@@ -205,7 +208,7 @@ public final class AttributesJavaDataType {
                 case DERIVED:
                     return getCaptialCase(getCamelCase(yangType.getDataTypeName(), null));
                 default:
-                    return null;
+                    throw new TranslatorException("given data type is not supported.");
             }
         } else {
             switch (type) {
@@ -216,7 +219,8 @@ public final class AttributesJavaDataType {
                 case STRING:
                     return STRING_DATA_TYPE;
                 case ENUMERATION:
-                    //TODO: ENUMERATION.
+                    return getCaptialCase(
+                            getCamelCase(((YangJavaEnumeration) yangType.getDataTypeExtendedInfo()).getName(), null));
                 case BITS:
                     //TODO:BITS
                 case BINARY:
@@ -269,7 +273,7 @@ public final class AttributesJavaDataType {
                 case DECIMAL64:
                     //TODO: DECIMAL64.
                 case ENUMERATION:
-                    //TODO: ENUMERATION.
+                    return getEnumsPackage(yangType);
                 case BITS:
                     //TODO:BITS
                 case BINARY:
@@ -287,7 +291,7 @@ public final class AttributesJavaDataType {
                 case DERIVED:
                     return getTypDefsPackage(yangType);
                 default:
-                    return null;
+                    throw new TranslatorException("given data type is not supported.");
             }
         } else {
             switch (type) {
@@ -298,7 +302,7 @@ public final class AttributesJavaDataType {
                 case STRING:
                     return JAVA_LANG;
                 case ENUMERATION:
-                    //TODO: ENUMERATION.
+                    return getEnumsPackage(yangType);
                 case BITS:
                     //TODO:BITS
                 case BINARY:
@@ -364,6 +368,24 @@ public final class AttributesJavaDataType {
     }
 
     /**
+     * Returns YANG enumeration's java package.
+     *
+     * @param type YANG type
+     * @return YANG enumeration's java package
+     */
+    private static String getEnumsPackage(YangType<?> type) {
+
+        if (!(type.getDataTypeExtendedInfo() instanceof YangEnumeration)) {
+            throw new TranslatorException("type should have been enumeration.");
+        }
+        YangJavaEnumeration enumeration = (YangJavaEnumeration) type.getDataTypeExtendedInfo();
+        if (enumeration.getJavaFileInfo().getPackage() == null) {
+            return getPackageFromParent(enumeration.getParent());
+        }
+        return enumeration.getJavaFileInfo().getPackage();
+    }
+
+    /**
      * Returns package from parent node.
      *
      * @param parent parent YANG node

@@ -18,6 +18,7 @@ package org.onosproject.yangutils.translator.tojava.utils;
 
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_INTERFACE_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_ENUM_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_TYPEDEF_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.IMPL_CLASS_MASK;
@@ -27,6 +28,7 @@ import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerato
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER;
 import static org.onosproject.yangutils.utils.UtilConstants.CLASS;
 import static org.onosproject.yangutils.utils.UtilConstants.COMMA;
+import static org.onosproject.yangutils.utils.UtilConstants.ENUM;
 import static org.onosproject.yangutils.utils.UtilConstants.EXTEND;
 import static org.onosproject.yangutils.utils.UtilConstants.FINAL;
 import static org.onosproject.yangutils.utils.UtilConstants.IMPL;
@@ -76,11 +78,23 @@ public final class ClassDefinitionGenerator {
             return getTypeClassDefinition(yangName);
         } else if ((genFileTypes & GENERATE_UNION_CLASS) != 0) {
             return getTypeClassDefinition(yangName);
+        } else if ((genFileTypes & GENERATE_ENUM_CLASS) != 0) {
+            return getEnumClassDefinition(yangName);
         }
         return null;
     }
 
     /**
+     * Returns enum file class definition.
+     *
+     * @param yangName class name
+     * @return enum file class definiton
+     */
+    private static String getEnumClassDefinition(String yangName) {
+        return PUBLIC + SPACE + ENUM + SPACE + yangName + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
+    }
+
+    /**
      * Returns interface file class definition.
      *
      * @param yangName file name

@@ -20,11 +20,13 @@ import org.onosproject.yangutils.translator.tojava.JavaQualifiedTypeInfo;
 
 import static org.onosproject.yangutils.translator.tojava.utils.ClassDefinitionGenerator.generateClassDefinition;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCamelCase;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getEnumJavaAttribute;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getSmallCase;
 import static org.onosproject.yangutils.utils.UtilConstants.ARRAY_LIST;
 import static org.onosproject.yangutils.utils.UtilConstants.AUGMENTED_INFO;
 import static org.onosproject.yangutils.utils.UtilConstants.CLOSE_CURLY_BRACKET;
 import static org.onosproject.yangutils.utils.UtilConstants.CLOSE_PARENTHESIS;
+import static org.onosproject.yangutils.utils.UtilConstants.COMMA;
 import static org.onosproject.yangutils.utils.UtilConstants.DIAMOND_CLOSE_BRACKET;
 import static org.onosproject.yangutils.utils.UtilConstants.DIAMOND_OPEN_BRACKET;
 import static org.onosproject.yangutils.utils.UtilConstants.EQUAL;
@@ -38,6 +40,8 @@ import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
 import static org.onosproject.yangutils.utils.UtilConstants.PRIVATE;
 import static org.onosproject.yangutils.utils.UtilConstants.SEMI_COLAN;
 import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.ENUM_ATTRIBUTE;
 
 /**
  * Represents utility class to generate the java snippet.
@@ -155,4 +159,17 @@ public final class JavaCodeSnippetGen {
     public static String getJavaClassDefClose() {
         return CLOSE_CURLY_BRACKET;
     }
+
+    /**
+     * Returns string for enum's attribute.
+     *
+     * @param name name of attribute
+     * @param value value of the enum
+     * @return string for enum's attribute
+     */
+    public static String generateEnumAttributeString(String name, int value) {
+        return getJavaDoc(ENUM_ATTRIBUTE, name, false) + FOUR_SPACE_INDENTATION + getEnumJavaAttribute(name)
+                + OPEN_PARENTHESIS + value + CLOSE_PARENTHESIS + COMMA + NEW_LINE;
+    }
+
 }

@@ -27,6 +27,7 @@ import org.onosproject.yangutils.translator.tojava.JavaFileInfo;
 
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_INTERFACE_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_ENUM_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_TYPEDEF_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.IMPL_CLASS_MASK;
@@ -34,6 +35,7 @@ import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.ATTRIBUTES_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.CONSTRUCTOR_FOR_TYPE_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.CONSTRUCTOR_IMPL_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.ENUM_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EQUALS_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.GETTER_FOR_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.GETTER_FOR_INTERFACE_MASK;
@@ -45,15 +47,19 @@ import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.UNION_FROM_STRING_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaCodeSnippetGen.getAugmentedInfoAttribute;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getDataFromTempFileHandle;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getEnumsValueAttribute;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.initiateJavaFileGeneration;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCaptialCase;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getSmallCase;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getAddAugmentInfoMethodImpl;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getAugmentInfoListImpl;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getConstructorStart;
+import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getEnumsConstrcutor;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getEqualsMethodClose;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getEqualsMethodOpen;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getFromStringMethodClose;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getFromStringMethodSignature;
+import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getGetter;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getHashCodeMethodClose;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getHashCodeMethodOpen;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getOmitNullValueString;
@@ -63,14 +69,21 @@ import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator
 import static org.onosproject.yangutils.translator.tojava.utils.TempJavaCodeFragmentFilesUtils.isHasAugmentationExtended;
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER;
 import static org.onosproject.yangutils.utils.UtilConstants.CLOSE_CURLY_BRACKET;
+import static org.onosproject.yangutils.utils.UtilConstants.COMMA;
 import static org.onosproject.yangutils.utils.UtilConstants.EMPTY_STRING;
 import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
 import static org.onosproject.yangutils.utils.UtilConstants.IMPL;
+import static org.onosproject.yangutils.utils.UtilConstants.INT;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
 import static org.onosproject.yangutils.utils.UtilConstants.PRIVATE;
 import static org.onosproject.yangutils.utils.UtilConstants.PUBLIC;
+import static org.onosproject.yangutils.utils.UtilConstants.SEMI_COLAN;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.GETTER_METHOD;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.TYPE_CONSTRUCTOR;
 import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.insertDataIntoJavaFile;
 import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.partString;
+import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.trimAtLast;
 
 /**
  * Representation of java file generator.
@@ -384,7 +397,7 @@ public final class JavaFileGenerator {
     }
 
     /**
-     * Generate class file for type def.
+     * Generates class file for type def.
      *
      * @param file    generated file
      * @param curNode current YANG node
@@ -469,7 +482,7 @@ public final class JavaFileGenerator {
     }
 
     /**
-     * Generate class file for union type.
+     * Generates class file for union type.
      *
      * @param file    generated file
      * @param curNode current YANG node
@@ -559,4 +572,56 @@ public final class JavaFileGenerator {
 
         return file;
     }
+
+    /**
+     * Generates class file for type enum.
+     *
+     * @param file generated file
+     * @param curNode current YANG node
+     * @return class file for type enum
+     * @throws IOException when fails to generate class file
+    */
+    public static File generateEnumClassFile(File file, YangNode curNode) throws IOException {
+
+        JavaFileInfo javaFileInfo = ((HasJavaFileInfo) curNode).getJavaFileInfo();
+
+        String className = getCaptialCase(javaFileInfo.getJavaName());
+        String path = javaFileInfo.getBaseCodeGenPath() + javaFileInfo.getPackageFilePath();
+
+        initiateJavaFileGeneration(file, className, GENERATE_ENUM_CLASS, null, path);
+        /**
+         * Add attribute strings.
+         */
+        try {
+            insertDataIntoJavaFile(file,
+                    trimAtLast(trimAtLast(getDataFromTempFileHandle(ENUM_IMPL_MASK, curNode), COMMA), NEW_LINE)
+                            + SEMI_COLAN + NEW_LINE);
+        } catch (IOException e) {
+            throw new IOException("No data found in temporary java code fragment files for " + className
+                    + " while enum class file generation");
+        }
+
+        /**
+         * Add an attribute to get the enum's values.
+         */
+        insertDataIntoJavaFile(file, getEnumsValueAttribute(className));
+
+        /**
+         * Add a constructor for enum.
+         */
+        insertDataIntoJavaFile(file,
+                getJavaDoc(TYPE_CONSTRUCTOR, getSmallCase(className), false) + getEnumsConstrcutor(className)
+                        + NEW_LINE);
+
+        /**
+         * Add a getter method for enum.
+         */
+        insertDataIntoJavaFile(file,
+                getJavaDoc(GETTER_METHOD, getSmallCase(className), false) + getGetter(INT, getSmallCase(className))
+                        + NEW_LINE);
+
+        insertDataIntoJavaFile(file, CLOSE_CURLY_BRACKET + NEW_LINE);
+
+        return file;
+    }
 }

@@ -28,6 +28,7 @@ import org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType;
 
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.BUILDER_INTERFACE_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_ENUM_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_TYPEDEF_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.IMPL_CLASS_MASK;
@@ -35,6 +36,7 @@ import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.ATTRIBUTES_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.CONSTRUCTOR_FOR_TYPE_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.CONSTRUCTOR_IMPL_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.ENUM_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EQUALS_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.GETTER_FOR_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.GETTER_FOR_INTERFACE_MASK;
@@ -46,17 +48,22 @@ import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.UNION_FROM_STRING_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaCodeSnippetGen.getJavaClassDefStart;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getJavaPackageFromPackagePath;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getSmallCase;
+import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
+import static org.onosproject.yangutils.utils.UtilConstants.INT;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
 import static org.onosproject.yangutils.utils.UtilConstants.ORG;
 import static org.onosproject.yangutils.utils.UtilConstants.PACKAGE;
+import static org.onosproject.yangutils.utils.UtilConstants.PRIVATE;
 import static org.onosproject.yangutils.utils.UtilConstants.SEMI_COLAN;
 import static org.onosproject.yangutils.utils.UtilConstants.SLASH;
 import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.BUILDER_CLASS;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.BUILDER_INTERFACE;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.ENUM_CLASS;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.IMPL_CLASS;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.INTERFACE;
-import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
 import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.insertDataIntoJavaFile;
 
 /**
@@ -134,6 +141,9 @@ public final class JavaFileGeneratorUtils {
         } else if ((generatedTempFiles & UNION_FROM_STRING_IMPL_MASK) != 0) {
             return tempJavaCodeFragmentFiles
                     .getTemporaryDataFromFileHandle(tempJavaCodeFragmentFiles.getUnionFromStringImplTempFileHandle());
+        } else if ((generatedTempFiles & ENUM_IMPL_MASK) != 0) {
+            return tempJavaCodeFragmentFiles
+                    .getTemporaryDataFromFileHandle(tempJavaCodeFragmentFiles.getEnumClassTempFileHandle());
         }
         return null;
     }
@@ -190,6 +200,9 @@ public final class JavaFileGeneratorUtils {
         } else if ((type & GENERATE_UNION_CLASS) != 0) {
             appendHeaderContents(file, pkgString, importsList);
             write(file, fileName, type, IMPL_CLASS);
+        } else if ((type & GENERATE_ENUM_CLASS) != 0) {
+            appendHeaderContents(file, pkgString, importsList);
+            write(file, fileName, type, ENUM_CLASS);
         }
     }
 
@@ -259,4 +272,15 @@ public final class JavaFileGeneratorUtils {
         insertDataIntoJavaFile(file, getJavaClassDefStart(genType, fileName));
     }
 
+    /**
+     * Returns integer attribute for enum's class to get the values.
+     *
+     * @param className enum's class name
+     * @return enum's attribute
+     */
+    public static String getEnumsValueAttribute(String className) {
+        return NEW_LINE + FOUR_SPACE_INDENTATION + PRIVATE + SPACE + INT + SPACE + getSmallCase(className) + SEMI_COLAN
+                + NEW_LINE;
+    }
+
 }

@@ -381,6 +381,25 @@ public final class JavaIdentifierSyntax {
     }
 
     /**
+     * Returns enum's java name.
+     *
+     * @param name enum's name
+     * @return enum's java name
+     */
+    public static String getEnumJavaAttribute(String name) {
+
+        String[] strArray = name.split(HYPHEN);
+        String output = EMPTY_STRING;
+        for (int i = 0; i < strArray.length; i++) {
+            output = output + strArray[i];
+            if (i > 0 && i < strArray.length - 1) {
+                output = output + UNDER_SCORE;
+            }
+        }
+        return output;
+    }
+
+    /**
      * Returns the directory path corresponding to java package.
      *
      * @param packagePath package path

@@ -87,6 +87,7 @@ import static org.onosproject.yangutils.utils.UtilConstants.TRY;
 import static org.onosproject.yangutils.utils.UtilConstants.TWELVE_SPACE_INDENTATION;
 import static org.onosproject.yangutils.utils.UtilConstants.VALUE;
 import static org.onosproject.yangutils.utils.UtilConstants.VOID;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.BUILD_METHOD;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.CONSTRUCTOR;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.DEFAULT_CONSTRUCTOR;
@@ -95,7 +96,6 @@ import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.OF_
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.SETTER_METHOD;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.TYPE_CONSTRUCTOR;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.UNION_FROM_METHOD;
-import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
 import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.trimAtLast;
 
 /**
@@ -218,7 +218,7 @@ public final class MethodsGenerator {
      * @param name attribute name
      * @return getter for attribute
      */
-    private static String getGetter(String type, String name) {
+    public static String getGetter(String type, String name) {
         return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + type + SPACE + GET_METHOD_PREFIX + getCaptialCase(name)
                 + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION
                 + RETURN + SPACE + name + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
@@ -803,4 +803,15 @@ public final class MethodsGenerator {
         return method;
     }
 
+    /**
+     * Returns enum's constructor.
+     *
+     * @param className enum's class name
+     * @return enum's constructor
+     */
+    public static String getEnumsConstrcutor(String className) {
+        return FOUR_SPACE_INDENTATION + className + OPEN_PARENTHESIS + INT + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE
+                + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + getSmallCase(className) + SPACE + EQUAL
+                + SPACE + VALUE + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
+    }
 }

@@ -31,6 +31,8 @@ import static org.onosproject.yangutils.utils.UtilConstants.AUGMENTED_INFO;
 import static org.onosproject.yangutils.utils.UtilConstants.HAS_AUGMENTATION;
 import static org.onosproject.yangutils.utils.io.impl.FileSystemUtil.updateFileHandle;
 
+import static java.util.Collections.sort;
+
 /**
  * Represents utilities for temporary java code fragments.
  */
@@ -128,7 +130,7 @@ public final class TempJavaCodeFragmentFilesUtils {
         } else {
             imports.remove(curImport);
         }
-        java.util.Collections.sort(imports);
+        sort(imports);
         return imports;
     }
 

@@ -30,6 +30,7 @@ import org.onosproject.yangutils.datamodel.YangNotification;
 import org.onosproject.yangutils.datamodel.YangOutput;
 import org.onosproject.yangutils.translator.tojava.TempJavaCodeFragmentFiles;
 import org.onosproject.yangutils.translator.tojava.javamodel.JavaCodeGeneratorInfo;
+import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaEnumeration;
 
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCamelCase;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCaptialCase;
@@ -116,6 +117,9 @@ public final class YangJavaModelUtils {
         } else if (javaCodeGeneratorInfo instanceof HasType) {
             javaCodeGeneratorInfo.getTempJavaCodeFragmentFiles()
                     .addTypeInfoToTempFiles((HasType) javaCodeGeneratorInfo);
+        } else if (javaCodeGeneratorInfo instanceof YangJavaEnumeration) {
+            javaCodeGeneratorInfo.getTempJavaCodeFragmentFiles()
+                    .addEnumAttributeToTempFiles((YangNode) javaCodeGeneratorInfo);
         } else {
             //TODO throw exception
         }

@@ -53,9 +53,24 @@ public final class UtilConstants {
     public static final String BUILDER_INTERFACE_JAVA_DOC = " * Builder for ";
 
     /**
+     * JavaDocs for enum class.
+     */
+    public static final String ENUM_CLASS_JAVADOC = " * Represents ENUM data of ";
+
+    /**
+     * JavaDocs for enum attribute.
+     */
+    public static final String ENUM_ATTRIBUTE_JAVADOC = " * Represents ";
+
+    /**
      * JavaDocs for package info class.
      */
-    public static final String PACKAGE_INFO_JAVADOC = " * Implementation of YANG file ";
+    public static final String PACKAGE_INFO_JAVADOC = " * Implementation of YANG node ";
+
+    /**
+     * JavaDocs for package info class.
+     */
+    public static final String PACKAGE_INFO_JAVADOC_OF_CHILD = "'s children nodes";
 
     /**
      * JavaDocs's first line.
@@ -283,6 +298,11 @@ public final class UtilConstants {
     public static final String VALUE = "value";
 
     /**
+     * Static attribute for enumValue syntax.
+     */
+    public static final String ENUM_VALUE = "enumValue";
+
+    /**
      * Static attribute for suffix s.
      */
     public static final String SUFFIX_S = "s";

@@ -23,6 +23,7 @@ import java.io.FileReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.Calendar;
 
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
 
@@ -33,6 +34,8 @@ public final class CopyrightHeader {
 
     private static final int EOF = -1;
     private static final String COPYRIGHT_HEADER_FILE = "CopyrightHeader.txt";
+    private static final String COPYRIGHTS_FIRST_LINE = "/*\n * Copyright " + Calendar.getInstance().get(Calendar.YEAR)
+            + "-present Open Networking Laboratory\n";
     private static final String TEMP_FILE = "temp.txt";
     private static ClassLoader classLoader = CopyrightHeader.class.getClassLoader();
 
@@ -82,6 +85,7 @@ public final class CopyrightHeader {
             OutputStream out = new FileOutputStream(temp);
 
             int index;
+            out.write(COPYRIGHTS_FIRST_LINE.getBytes());
             while ((index = stream.read()) != EOF) {
                 out.write(index);
             }

@@ -22,6 +22,8 @@ import static org.onosproject.yangutils.utils.UtilConstants.BUILDER;
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER_CLASS_JAVA_DOC;
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER_INTERFACE_JAVA_DOC;
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER_OBJECT;
+import static org.onosproject.yangutils.utils.UtilConstants.ENUM_ATTRIBUTE_JAVADOC;
+import static org.onosproject.yangutils.utils.UtilConstants.ENUM_CLASS_JAVADOC;
 import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
 import static org.onosproject.yangutils.utils.UtilConstants.FROM_STRING_METHOD_NAME;
 import static org.onosproject.yangutils.utils.UtilConstants.FROM_STRING_PARAM_NAME;
@@ -135,7 +137,17 @@ public final class JavaDocGen {
         /**
          * For build.
          */
-        BUILD_METHOD
+        BUILD_METHOD,
+
+        /**
+         * For enum.
+         */
+        ENUM_CLASS,
+
+        /**
+         * For enum's attributes.
+         */
+        ENUM_ATTRIBUTE
     }
 
     /**
@@ -176,6 +188,10 @@ public final class JavaDocGen {
             javaDoc = generateForTypeConstructor(name);
         } else if (type.equals(JavaDocType.UNION_FROM_METHOD)) {
             javaDoc = generateForUnionFrom(name);
+        } else if (type.equals(JavaDocType.ENUM_CLASS)) {
+            javaDoc = generateForEnum(name);
+        } else if (type.equals(JavaDocType.ENUM_ATTRIBUTE)) {
+            javaDoc = generateForEnumAttr(name);
         } else {
             javaDoc = generateForConstructors(name);
         }
@@ -183,7 +199,18 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generate javaDocs for getter method.
+     * Generates javaDocs for enum's attributes.
+     *
+     * @param name attribute name
+     * @return javaDocs
+     */
+    private static String generateForEnumAttr(String name) {
+        return NEW_LINE + FOUR_SPACE_INDENTATION + JAVA_DOC_FIRST_LINE + FOUR_SPACE_INDENTATION + ENUM_ATTRIBUTE_JAVADOC
+                + name + PERIOD + NEW_LINE + FOUR_SPACE_INDENTATION + JAVA_DOC_END_LINE;
+    }
+
+    /**
+     * Generates javaDocs for getter method.
      *
      * @param attribute attribute
      * @param isList    is list attribute
@@ -272,30 +299,28 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generates javaDocs for typedef constructor.
+     * Generates javaDocs for the impl class.
      *
-     * @param attribute attribute
+     * @param className class name
      * @return javaDocs
      */
-    private static String generateForTypeDefConstructor(String attribute) {
-        return (NEW_LINE + FOUR_SPACE_INDENTATION + JAVA_DOC_FIRST_LINE + FOUR_SPACE_INDENTATION + JAVA_DOC_CONSTRUCTOR
-                + attribute + PERIOD + NEW_LINE + FOUR_SPACE_INDENTATION + NEW_LINE_ASTERISK + FOUR_SPACE_INDENTATION
-                + JAVA_DOC_PARAM + VALUE + SPACE + VALUE + SPACE + OF + SPACE + attribute + NEW_LINE
-                + FOUR_SPACE_INDENTATION + JAVA_DOC_END_LINE);
+    private static String generateForImplClass(String className) {
+        return NEW_LINE + JAVA_DOC_FIRST_LINE + IMPL_CLASS_JAVA_DOC + className + PERIOD + NEW_LINE + JAVA_DOC_END_LINE;
     }
 
     /**
-     * Generate javaDocs for the impl class.
+     * Generates javaDocs for enum.
      *
-     * @param className class name
+     * @param className enum class name
      * @return javaDocs
      */
-    private static String generateForImplClass(String className) {
-        return NEW_LINE + JAVA_DOC_FIRST_LINE + IMPL_CLASS_JAVA_DOC + className + PERIOD + NEW_LINE + JAVA_DOC_END_LINE;
+    private static String generateForEnum(String className) {
+        return NEW_LINE + NEW_LINE + JAVA_DOC_FIRST_LINE + ENUM_CLASS_JAVADOC + className + PERIOD + NEW_LINE
+                + JAVA_DOC_END_LINE;
     }
 
     /**
-     * Generate javaDocs for the builder class.
+     * Generates javaDocs for the builder class.
      *
      * @param className class name
      * @return javaDocs
@@ -306,7 +331,7 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generate javaDoc for the interface.
+     * Generates javaDoc for the interface.
      *
      * @param interfaceName interface name
      * @return javaDocs
@@ -317,7 +342,7 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generate javaDoc for the builder interface.
+     * Generates javaDoc for the builder interface.
      *
      * @param builderforName builder for name
      * @return javaDocs
@@ -328,7 +353,7 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generate javaDocs for package-info.
+     * Generates javaDocs for package-info.
      *
      * @param packageName package name
      * @return javaDocs
@@ -338,7 +363,7 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generate javaDocs for default constructor.
+     * Generates javaDocs for default constructor.
      *
      * @param className class name
      * @return javaDocs
@@ -349,7 +374,7 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generate javaDocs for constructor with parameters.
+     * Generates javaDocs for constructor with parameters.
      *
      * @param className class name
      * @return javaDocs
@@ -363,7 +388,7 @@ public final class JavaDocGen {
     }
 
     /**
-     * Generate javaDocs for build.
+     * Generates javaDocs for build.
      *
      * @param buildName builder name
      * @return javaDocs

@@ -44,6 +44,7 @@ import static org.onosproject.yangutils.utils.UtilConstants.TWELVE_SPACE_INDENTA
 import static org.onosproject.yangutils.utils.UtilConstants.YANG_RESOURCES;
 import static org.onosproject.yangutils.utils.io.impl.FileSystemUtil.appendFileContents;
 import static org.onosproject.yangutils.utils.io.impl.FileSystemUtil.updateFileHandle;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
 import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.PACKAGE_INFO;
 import static org.slf4j.LoggerFactory.getLogger;
 
@@ -96,7 +97,7 @@ public final class YangIoUtils {
             BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
 
             bufferedWriter.write(CopyrightHeader.getCopyrightHeader());
-            bufferedWriter.write(JavaDocGen.getJavaDoc(PACKAGE_INFO, classInfo, false));
+            bufferedWriter.write(getJavaDoc(PACKAGE_INFO, classInfo, false));
             bufferedWriter.write(PACKAGE + SPACE + pack + SEMI_COLAN);
 
             bufferedWriter.close();

-/*
- * Copyright 2016-present Open Networking Laboratory
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

@@ -17,10 +17,13 @@
 package org.onosproject.yangutils.utils.io.impl;
 
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
+import java.util.Calendar;
 
 import org.junit.Rule;
 import org.junit.Test;
@@ -40,7 +43,8 @@ import static org.slf4j.LoggerFactory.getLogger;
 public final class CopyrightHeaderTest {
 
     private final Logger log = getLogger(getClass());
-
+    private static final String COPYRIGHTS_FIRST_LINE = "/*\n * Copyright " + Calendar.getInstance().get(Calendar.YEAR)
+            + "-present Open Networking Laboratory\n";
     @Rule
     public ExpectedException thrown = ExpectedException.none();
 
@@ -74,16 +78,30 @@ public final class CopyrightHeaderTest {
     @Test
     public void testGetCopyrightHeader() throws IOException {
 
-        String baseDir = System.getProperty("basedir");
-        String path = "/src/test/resources/CopyrightHeader.txt";
+        String path = "src/test/resources/CopyrightHeader.txt";
+
+        File testRsc = new File(path);
+        FileInputStream in = new FileInputStream(testRsc);
+
+        File testFile = new File("target/TestHeader.txt");
+        FileOutputStream out = new FileOutputStream(testFile);
+
+        out.write(COPYRIGHTS_FIRST_LINE.getBytes());
+        int c = 0;
+        while ((c = in.read()) != -1) {
+            out.write(c);
+        }
 
         String licenseHeader = getCopyrightHeader();
         File test = new File("target/TestCopyrightHeader.txt");
 
-        FileWriter out = new FileWriter(test);
-        out.write(licenseHeader);
+        FileWriter writer = new FileWriter(test);
+        writer.write(licenseHeader);
+        writer.close();
         out.close();
+        out.flush();
+        in.close();
 
-        assertThat(true, is(contentEquals(test, new File(baseDir + path))));
+        assertThat(true, is(contentEquals(test, testFile)));
     }
 }
\ No newline at end of file

@@ -159,7 +159,7 @@ public final class JavaDocGenTest {
     @Test
     public void packageInfoGenerationTest() {
         String packageInfo = getJavaDoc(PACKAGE_INFO, TEST_NAME, false);
-        assertThat(true, is(packageInfo.contains("Implementation of YANG file") && packageInfo.contains(END_STRING)));
+        assertThat(true, is(packageInfo.contains("Implementation of YANG node") && packageInfo.contains(END_STRING)));
     }
 
     /**

-/*
- * Copyright 2016-present Open Networking Laboratory
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.