diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/AttributesJavaDataType.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/AttributesJavaDataType.java
index 077e39f..64fdf04 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/AttributesJavaDataType.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/AttributesJavaDataType.java
@@ -21,10 +21,12 @@
 import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.datamodel.YangType;
 import org.onosproject.yangutils.datamodel.YangTypeDef;
+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.YangJavaTypeDef;
+import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaUnion;
 
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCamelCase;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCaptialCase;
@@ -33,15 +35,23 @@
 import static org.onosproject.yangutils.utils.UtilConstants.BOOLEAN_WRAPPER;
 import static org.onosproject.yangutils.utils.UtilConstants.BYTE;
 import static org.onosproject.yangutils.utils.UtilConstants.BYTE_WRAPPER;
+import static org.onosproject.yangutils.utils.UtilConstants.EMPTY_STRING;
 import static org.onosproject.yangutils.utils.UtilConstants.INT;
 import static org.onosproject.yangutils.utils.UtilConstants.INTEGER_WRAPPER;
 import static org.onosproject.yangutils.utils.UtilConstants.JAVA_LANG;
 import static org.onosproject.yangutils.utils.UtilConstants.JAVA_MATH;
 import static org.onosproject.yangutils.utils.UtilConstants.LONG;
 import static org.onosproject.yangutils.utils.UtilConstants.LONG_WRAPPER;
+import static org.onosproject.yangutils.utils.UtilConstants.NEW;
+import static org.onosproject.yangutils.utils.UtilConstants.OF;
+import static org.onosproject.yangutils.utils.UtilConstants.PARSE_BYTE;
+import static org.onosproject.yangutils.utils.UtilConstants.PARSE_INT;
+import static org.onosproject.yangutils.utils.UtilConstants.PARSE_LONG;
+import static org.onosproject.yangutils.utils.UtilConstants.PARSE_SHORT;
 import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
 import static org.onosproject.yangutils.utils.UtilConstants.SHORT;
 import static org.onosproject.yangutils.utils.UtilConstants.SHORT_WRAPPER;
+import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
 import static org.onosproject.yangutils.utils.UtilConstants.STRING_DATA_TYPE;
 
 /**
@@ -94,9 +104,56 @@
     }
 
     /**
+     * Returns from string method parsed string.
+     *
+     * @param targetDataType target data type
+     * @param yangType       YANG type
+     * @return parsed string
+     */
+    public static String getParseFromStringMethod(String targetDataType, YangType<?> yangType) {
+
+        YangDataTypes type = yangType.getDataType();
+
+        switch (type) {
+            case INT8:
+                return BYTE_WRAPPER + PERIOD + PARSE_BYTE;
+            case INT16:
+                return SHORT_WRAPPER + PERIOD + PARSE_SHORT;
+            case INT32:
+                return INTEGER_WRAPPER + PERIOD + PARSE_INT;
+            case INT64:
+                return LONG_WRAPPER + PERIOD + PARSE_LONG;
+            case UINT8:
+                return SHORT_WRAPPER + PERIOD + PARSE_SHORT;
+            case UINT16:
+                return INTEGER_WRAPPER + PERIOD + PARSE_INT;
+            case UINT32:
+                return LONG_WRAPPER + PERIOD + PARSE_LONG;
+            case UINT64:
+                return NEW + SPACE + BIG_INTEGER;
+            case DECIMAL64:
+                //TODO: DECIMAL64.
+            case STRING:
+                return EMPTY_STRING;
+            case BOOLEAN:
+                return BOOLEAN_DATA_TYPE;
+            case ENUMERATION:
+                //TODO:ENUMERATION.
+            case BITS:
+                //TODO:BITS
+            case BINARY:
+                //TODO:BINARY
+            case DERIVED:
+                return targetDataType + PERIOD + OF;
+            default:
+                throw new TranslatorException("given data type is not supported.");
+        }
+    }
+
+    /**
      * Returns java import class.
      *
-     * @param yangType YANG type
+     * @param yangType   YANG type
      * @param isListAttr if the attribute need to be a list
      * @return java import class
      */
@@ -141,13 +198,14 @@
                 case EMPTY:
                     return BOOLEAN_WRAPPER;
                 case UNION:
-                    //TODO:UNION
+                    return getCaptialCase(getCamelCase(((YangJavaUnion) yangType.getDataTypeExtendedInfo()).getName(),
+                            null));
                 case INSTANCE_IDENTIFIER:
                     //TODO:INSTANCE_IDENTIFIER
                 case DERIVED:
                     return getCaptialCase(getCamelCase(yangType.getDataTypeName(), null));
                 default:
-                    throw new TranslatorException("given data type is not supported.");
+                    return null;
             }
         } else {
             switch (type) {
@@ -170,7 +228,8 @@
                 case EMPTY:
                     //TODO:EMPTY
                 case UNION:
-                    //TODO:UNION
+                    return getCaptialCase(getCamelCase(((YangJavaUnion) yangType.getDataTypeExtendedInfo()).getName(),
+                            null));
                 case INSTANCE_IDENTIFIER:
                     //TODO:INSTANCE_IDENTIFIER
                 case DERIVED:
@@ -184,9 +243,9 @@
     /**
      * Returns java import package.
      *
-     * @param yangType YANG type
+     * @param yangType   YANG type
      * @param isListAttr if the attribute is of list type
-     * @param classInfo java import class info
+     * @param classInfo  java import class info
      * @return java import package
      */
     public static String getJavaImportPackage(YangType<?> yangType, boolean isListAttr, String classInfo) {
@@ -222,13 +281,13 @@
                 case EMPTY:
                     //TODO:EMPTY
                 case UNION:
-                    //TODO:UNION
+                    return getUnionPackage(yangType);
                 case INSTANCE_IDENTIFIER:
                     //TODO:INSTANCE_IDENTIFIER
                 case DERIVED:
                     return getTypDefsPackage(yangType);
                 default:
-                    throw new TranslatorException("given data type is not supported.");
+                    return null;
             }
         } else {
             switch (type) {
@@ -251,7 +310,7 @@
                 case EMPTY:
                     //TODO:EMPTY
                 case UNION:
-                    //TODO:UNION
+                    return getUnionPackage(yangType);
                 case INSTANCE_IDENTIFIER:
                     //TODO:INSTANCE_IDENTIFIER
                 case DERIVED:
@@ -286,6 +345,25 @@
     }
 
     /**
+     * Returns java package for union node.
+     *
+     * @param type YANG type
+     * @return java package for union node
+     */
+    private static String getUnionPackage(YangType<?> type) {
+
+        if (!(type.getDataTypeExtendedInfo() instanceof YangUnion)) {
+            throw new TranslatorException("type should have been union.");
+        }
+
+        YangJavaUnion union = (YangJavaUnion) type.getDataTypeExtendedInfo();
+        if (union.getJavaFileInfo().getPackage() == null) {
+            return getPackageFromParent(union.getParent());
+        }
+        return union.getJavaFileInfo().getPackage();
+    }
+
+    /**
      * Returns package from parent node.
      *
      * @param parent parent YANG node
@@ -293,7 +371,7 @@
      */
     private static String getPackageFromParent(YangNode parent) {
         if (!(parent instanceof HasJavaFileInfo)) {
-            throw new TranslatorException("Invalid child node is being processed.");
+            throw new TranslatorException("invalid child node is being processed.");
         }
         JavaFileInfo parentInfo = ((HasJavaFileInfo) parent).getJavaFileInfo();
         return parentInfo.getPackage() + PERIOD + parentInfo.getJavaName().toLowerCase();
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/ClassDefinitionGenerator.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/ClassDefinitionGenerator.java
index f3adba0..529a93d 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/ClassDefinitionGenerator.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/ClassDefinitionGenerator.java
@@ -19,6 +19,7 @@
 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_TYPEDEF_CLASS;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.IMPL_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.INTERFACE_MASK;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.getExtendsList;
@@ -54,7 +55,7 @@
      * / interface definition start.
      *
      * @param genFileTypes generated file type
-     * @param yangName class name
+     * @param yangName     class name
      * @return class definition
      */
     public static String generateClassDefinition(int genFileTypes, String yangName) {
@@ -64,20 +65,17 @@
          * class / interface definition start.
          */
         if ((genFileTypes & INTERFACE_MASK) != 0) {
-
             return getInterfaceDefinition(yangName);
         } else if ((genFileTypes & BUILDER_CLASS_MASK) != 0) {
-
             return getBuilderClassDefinition(yangName);
         } else if ((genFileTypes & IMPL_CLASS_MASK) != 0) {
-
             return getImplClassDefinition(yangName);
         } else if ((genFileTypes & BUILDER_INTERFACE_MASK) != 0) {
-
             return getBuilderInterfaceDefinition(yangName);
         } else if ((genFileTypes & GENERATE_TYPEDEF_CLASS) != 0) {
-
-            return getTypeDefClassDefinition(yangName);
+            return getTypeClassDefinition(yangName);
+        } else if ((genFileTypes & GENERATE_UNION_CLASS) != 0) {
+            return getTypeClassDefinition(yangName);
         }
         return null;
     }
@@ -105,7 +103,7 @@
      * Returns builder interface file class definition.
      *
      * @param yangName java class name, corresponding to which the builder class
-     *            is being generated
+     *                 is being generated
      * @return definition
      */
     private static String getBuilderInterfaceDefinition(String yangName) {
@@ -135,12 +133,12 @@
     }
 
     /**
-     * Returns typeDef file class definition.
+     * Returns type file class definition.
      *
      * @param yangName file name
      * @return definition
      */
-    private static String getTypeDefClassDefinition(String yangName) {
+    private static String getTypeClassDefinition(String yangName) {
         return PUBLIC + SPACE + FINAL + SPACE + CLASS + SPACE + yangName + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
     }
 }
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGenerator.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGenerator.java
index 08b3072..6fc37a5 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGenerator.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGenerator.java
@@ -20,7 +20,6 @@
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
-
 import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.translator.tojava.HasJavaFileInfo;
 import org.onosproject.yangutils.translator.tojava.HasTempJavaCodeFragmentFiles;
@@ -29,17 +28,21 @@
 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_TYPEDEF_CLASS;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.IMPL_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.INTERFACE_MASK;
 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.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;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.HASH_CODE_IMPL_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.OF_STRING_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.SETTER_FOR_CLASS_MASK;
 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.utils.JavaCodeSnippetGen.getAugmentedInfoAttribute;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getDataFromTempFileHandle;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.initiateJavaFileGeneration;
@@ -49,8 +52,11 @@
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getConstructorStart;
 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.getHashCodeMethodClose;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getHashCodeMethodOpen;
+import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getOmitNullValueString;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getRemoveAugmentationImpl;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getToStringMethodClose;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getToStringMethodOpen;
@@ -82,8 +88,8 @@
     private static List<String> extendsList = new ArrayList<>();
 
     /**
-    * Creates an instance of java file generator.
-    */
+     * Creates an instance of java file generator.
+     */
     private JavaFileGenerator() {
     }
 
@@ -126,10 +132,10 @@
     /**
      * Returns generated interface file for current node.
      *
-     * @param file file
-     * @param imports imports for the file
-     * @param curNode current YANG node
-     * @param isAttrPresent  if any attribute is present or not
+     * @param file          file
+     * @param imports       imports for the file
+     * @param curNode       current YANG node
+     * @param isAttrPresent if any attribute is present or not
      * @return interface file
      * @throws IOException when fails to write in file
      */
@@ -163,9 +169,9 @@
     /**
      * Return generated builder interface file for current node.
      *
-     * @param file file
-     * @param curNode current YANG node
-     * @param isAttrPresent  if any attribute is present or not
+     * @param file          file
+     * @param curNode       current YANG node
+     * @param isAttrPresent if any attribute is present or not
      * @return builder interface file
      * @throws IOException when fails to write in file
      */
@@ -215,15 +221,15 @@
     /**
      * Returns generated builder class file for current node.
      *
-     * @param file file
-     * @param imports imports for the file
-     * @param curNode current YANG node
-     * @param isAttrPresent  if any attribute is present or not
+     * @param file          file
+     * @param imports       imports for the file
+     * @param curNode       current YANG node
+     * @param isAttrPresent if any attribute is present or not
      * @return builder class file
      * @throws IOException when fails to write in file
      */
     public static File generateBuilderClassFile(File file, List<String> imports, YangNode curNode,
-            boolean isAttrPresent) throws IOException {
+                                                boolean isAttrPresent) throws IOException {
 
         JavaFileInfo javaFileInfo = ((HasJavaFileInfo) curNode).getJavaFileInfo();
 
@@ -281,8 +287,8 @@
     /**
      * Returns generated impl class file for current node.
      *
-     * @param file file
-     * @param curNode current YANG node
+     * @param file          file
+     * @param curNode       current YANG node
      * @param isAttrPresent if any attribute is present or not
      * @return impl class file
      * @throws IOException when fails to write in file
@@ -378,14 +384,14 @@
     }
 
     /**
-     * Generates class file for type def.
+     * Generate class file for type def.
      *
-     * @param file generated file
+     * @param file    generated file
      * @param curNode current YANG node
      * @param imports imports for file
      * @return type def class file
      * @throws IOException when fails to generate class file
-    */
+     */
     public static File generateTypeDefClassFile(File file, YangNode curNode, List<String> imports) throws IOException {
 
         JavaFileInfo javaFileInfo = ((HasJavaFileInfo) curNode).getJavaFileInfo();
@@ -414,19 +420,19 @@
         methods.add(((HasTempJavaCodeFragmentFiles) curNode).getTempJavaCodeFragmentFiles()
                 .addDefaultConstructor(PRIVATE, EMPTY_STRING));
 
-        /**
-         * Constructor.
-         */
-        methods.add(((HasTempJavaCodeFragmentFiles) curNode).getTempJavaCodeFragmentFiles()
-                .addTypeDefConstructor());
-
-        /**
-         * Of method.
-         */
-        methods.add(((HasTempJavaCodeFragmentFiles) curNode).getTempJavaCodeFragmentFiles().addOfMethod());
         try {
 
             /**
+             * Type constructor.
+             */
+            methods.add(getDataFromTempFileHandle(CONSTRUCTOR_FOR_TYPE_MASK, curNode));
+
+            /**
+             * Of method.
+             */
+            methods.add(getDataFromTempFileHandle(OF_STRING_IMPL_MASK, curNode));
+
+            /**
              * Getter method.
              */
             methods.add(getDataFromTempFileHandle(GETTER_FOR_CLASS_MASK, curNode));
@@ -461,4 +467,96 @@
 
         return file;
     }
+
+    /**
+     * Generate class file for union type.
+     *
+     * @param file    generated file
+     * @param curNode current YANG node
+     * @param imports imports for file
+     * @return type def class file
+     * @throws IOException when fails to generate class file
+     */
+    public static File generateUnionClassFile(File file, YangNode curNode, List<String> imports) throws IOException {
+
+        JavaFileInfo javaFileInfo = ((HasJavaFileInfo) curNode).getJavaFileInfo();
+
+        String className = getCaptialCase(javaFileInfo.getJavaName());
+        String path = javaFileInfo.getBaseCodeGenPath() + javaFileInfo.getPackageFilePath();
+
+        initiateJavaFileGeneration(file, className, GENERATE_UNION_CLASS, imports, path);
+
+        List<String> methods = new ArrayList<>();
+
+        /**
+         * Add attribute strings.
+         */
+        try {
+            insertDataIntoJavaFile(file,
+                    NEW_LINE + FOUR_SPACE_INDENTATION + getDataFromTempFileHandle(ATTRIBUTES_MASK, curNode));
+        } catch (IOException e) {
+            throw new IOException("No data found in temporary java code fragment files for " + className
+                    + " while union class file generation");
+        }
+
+        /**
+         * Default constructor.
+         */
+        methods.add(((HasTempJavaCodeFragmentFiles) curNode).getTempJavaCodeFragmentFiles()
+                .addDefaultConstructor(PRIVATE, EMPTY_STRING));
+
+        try {
+
+            /**
+             * Type constructor.
+             */
+            methods.add(getDataFromTempFileHandle(CONSTRUCTOR_FOR_TYPE_MASK, curNode));
+
+            /**
+             * Of string method.
+             */
+            methods.add(getDataFromTempFileHandle(OF_STRING_IMPL_MASK, curNode));
+
+            /**
+             * Getter method.
+             */
+            methods.add(getDataFromTempFileHandle(GETTER_FOR_CLASS_MASK, curNode));
+
+            /**
+             * Hash code method.
+             */
+            methods.add(getHashCodeMethodClose(getHashCodeMethodOpen() + partString(
+                    getDataFromTempFileHandle(HASH_CODE_IMPL_MASK, curNode).replace(NEW_LINE, EMPTY_STRING))));
+
+            /**
+             * Equals method.
+             */
+            methods.add(getEqualsMethodClose(getEqualsMethodOpen(className + EMPTY_STRING)
+                    + getDataFromTempFileHandle(EQUALS_IMPL_MASK, curNode)));
+
+            /**
+             * To string method.
+             */
+            methods.add(getToStringMethodOpen() + getOmitNullValueString() +
+                    getDataFromTempFileHandle(TO_STRING_IMPL_MASK, curNode) + getToStringMethodClose());
+
+            /**
+             * From string method.
+             */
+            methods.add(getFromStringMethodSignature(className)
+                    + getDataFromTempFileHandle(UNION_FROM_STRING_IMPL_MASK, curNode)
+                    + getFromStringMethodClose());
+
+        } catch (IOException e) {
+            throw new IOException("No data found in temporary java code fragment files for " + className
+                    + " while union class file generation");
+        }
+
+        for (String method : methods) {
+            insertDataIntoJavaFile(file, method);
+        }
+        insertDataIntoJavaFile(file, CLOSE_CURLY_BRACKET + NEW_LINE);
+
+        return file;
+    }
 }
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGeneratorUtils.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGeneratorUtils.java
index 4228a2e..6aa3ead 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGeneratorUtils.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaFileGeneratorUtils.java
@@ -19,7 +19,6 @@
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
-
 import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.translator.tojava.HasTempJavaCodeFragmentFiles;
 import org.onosproject.yangutils.translator.tojava.JavaFileInfo;
@@ -30,17 +29,21 @@
 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_TYPEDEF_CLASS;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.IMPL_CLASS_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.INTERFACE_MASK;
 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.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;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.HASH_CODE_IMPL_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.OF_STRING_IMPL_MASK;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.SETTER_FOR_CLASS_MASK;
 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.utils.JavaCodeSnippetGen.getJavaClassDefStart;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getJavaPackageFromPackagePath;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
@@ -49,11 +52,11 @@
 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.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;
 
 /**
@@ -70,10 +73,10 @@
     /**
      * Returns a file object for generated file.
      *
-     * @param fileName file name
-     * @param filePath file package path
+     * @param fileName  file name
+     * @param filePath  file package path
      * @param extension file extension
-     * @param handle cached file handle
+     * @param handle    cached file handle
      * @return file object
      */
     public static File getFileObject(String filePath, String fileName, String extension, JavaFileInfo handle) {
@@ -85,7 +88,7 @@
      * Returns data stored in temporary files.
      *
      * @param generatedTempFiles temporary file types
-     * @param curNode current YANG node
+     * @param curNode            current YANG node
      * @return data stored in temporary files
      * @throws IOException when failed to get the data from temporary file handle
      */
@@ -121,6 +124,16 @@
         } else if ((generatedTempFiles & TO_STRING_IMPL_MASK) != 0) {
             return tempJavaCodeFragmentFiles
                     .getTemporaryDataFromFileHandle(tempJavaCodeFragmentFiles.getToStringImplTempFileHandle());
+        } else if ((generatedTempFiles & CONSTRUCTOR_FOR_TYPE_MASK) != 0) {
+            return tempJavaCodeFragmentFiles
+                    .getTemporaryDataFromFileHandle(tempJavaCodeFragmentFiles
+                            .getConstructorForTypeTempFileHandle());
+        } else if ((generatedTempFiles & OF_STRING_IMPL_MASK) != 0) {
+            return tempJavaCodeFragmentFiles
+                    .getTemporaryDataFromFileHandle(tempJavaCodeFragmentFiles.getOfStringImplTempFileHandle());
+        } else if ((generatedTempFiles & UNION_FROM_STRING_IMPL_MASK) != 0) {
+            return tempJavaCodeFragmentFiles
+                    .getTemporaryDataFromFileHandle(tempJavaCodeFragmentFiles.getUnionFromStringImplTempFileHandle());
         }
         return null;
     }
@@ -128,15 +141,15 @@
     /**
      * Initiates generation of file based on generated file type.
      *
-     * @param file generated file
+     * @param file      generated file
      * @param className generated file class name
-     * @param type generated file type
-     * @param imports imports for the file
-     * @param pkg generated file package
+     * @param type      generated file type
+     * @param imports   imports for the file
+     * @param pkg       generated file package
      * @throws IOException when fails to generate a file
      */
     public static void initiateJavaFileGeneration(File file, String className, int type, List<String> imports,
-            String pkg) throws IOException {
+                                                  String pkg) throws IOException {
 
         try {
             file.createNewFile();
@@ -149,42 +162,41 @@
     /**
      * Appends all the contents into a generated java file.
      *
-     * @param file generated file
-     * @param fileName generated file name
-     * @param type generated file type
-     * @param pkg generated file package
+     * @param file        generated file
+     * @param fileName    generated file name
+     * @param type        generated file type
+     * @param pkg         generated file package
      * @param importsList list of java imports.
      * @throws IOException when fails to append contents
      */
     private static void appendContents(File file, String fileName, int type, List<String> importsList,
-            String pkg) throws IOException {
+                                       String pkg) throws IOException {
 
         String pkgString = parsePackageString(pkg, importsList);
 
         if ((type & IMPL_CLASS_MASK) != 0) {
-
             write(file, fileName, type, IMPL_CLASS);
         } else if ((type & BUILDER_INTERFACE_MASK) != 0) {
-
             write(file, fileName, type, BUILDER_INTERFACE);
         } else if ((type & GENERATE_TYPEDEF_CLASS) != 0) {
             appendHeaderContents(file, pkgString, importsList);
             write(file, fileName, type, IMPL_CLASS);
         } else if ((type & INTERFACE_MASK) != 0) {
-
             appendHeaderContents(file, pkgString, importsList);
             write(file, fileName, type, INTERFACE);
         } else if ((type & BUILDER_CLASS_MASK) != 0) {
-
             appendHeaderContents(file, pkgString, importsList);
             write(file, fileName, type, BUILDER_CLASS);
+        } else if ((type & GENERATE_UNION_CLASS) != 0) {
+            appendHeaderContents(file, pkgString, importsList);
+            write(file, fileName, type, IMPL_CLASS);
         }
     }
 
     /**
      * Removes base directory path from package and generates package string for file.
      *
-     * @param javaPkg generated java package
+     * @param javaPkg     generated java package
      * @param importsList list of imports
      * @return package string
      */
@@ -208,10 +220,11 @@
     /**
      * Appends other contents to interface, builder and typedef classes.
      * for example : ONOS copyright, imports and package.
-     * @param file generated file
-     * @param pkg generated package
+     *
+     * @param file        generated file
+     * @param pkg         generated package
      * @param importsList list of imports
-     * @throws IOException when fails to append contents.
+     * @throws IOException when fails to append contents
      */
     private static void appendHeaderContents(File file, String pkg, List<String> importsList) throws IOException {
 
@@ -234,15 +247,14 @@
     /**
      * Writes data to the specific generated file.
      *
-     * @param file generated file
-     * @param fileName file name
-     * @param genType generated file type
+     * @param file        generated file
+     * @param fileName    file name
+     * @param genType     generated file type
      * @param javaDocType java doc type
      * @throws IOException when fails to write into a file
      */
     private static void write(File file, String fileName, int genType, JavaDocType javaDocType)
             throws IOException {
-
         insertDataIntoJavaFile(file, getJavaDoc(javaDocType, fileName, false));
         insertDataIntoJavaFile(file, getJavaClassDefStart(genType, fileName));
     }
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java
index 154090d..ec1296f 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/MethodsGenerator.java
@@ -18,6 +18,7 @@
 
 import org.onosproject.yangutils.translator.tojava.JavaAttributeInfo;
 
+import static org.onosproject.yangutils.translator.tojava.utils.AttributesJavaDataType.getParseFromStringMethod;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCamelCase;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCaptialCase;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getSmallCase;
@@ -28,7 +29,9 @@
 import static org.onosproject.yangutils.utils.UtilConstants.BOOLEAN_DATA_TYPE;
 import static org.onosproject.yangutils.utils.UtilConstants.BUILD;
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER;
+import static org.onosproject.yangutils.utils.UtilConstants.CATCH;
 import static org.onosproject.yangutils.utils.UtilConstants.CHECK_NOT_NULL_STRING;
+import static org.onosproject.yangutils.utils.UtilConstants.CLEAR;
 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;
@@ -38,8 +41,12 @@
 import static org.onosproject.yangutils.utils.UtilConstants.EMPTY_STRING;
 import static org.onosproject.yangutils.utils.UtilConstants.EQUAL;
 import static org.onosproject.yangutils.utils.UtilConstants.EQUALS_STRING;
+import static org.onosproject.yangutils.utils.UtilConstants.EXCEPTION;
+import static org.onosproject.yangutils.utils.UtilConstants.EXCEPTION_VAR;
 import static org.onosproject.yangutils.utils.UtilConstants.FALSE;
 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;
 import static org.onosproject.yangutils.utils.UtilConstants.GET_METHOD_PREFIX;
 import static org.onosproject.yangutils.utils.UtilConstants.GOOGLE_MORE_OBJECT_METHOD_STRING;
 import static org.onosproject.yangutils.utils.UtilConstants.HASH;
@@ -51,10 +58,12 @@
 import static org.onosproject.yangutils.utils.UtilConstants.LIST;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
+import static org.onosproject.yangutils.utils.UtilConstants.NULL;
 import static org.onosproject.yangutils.utils.UtilConstants.OBJ;
 import static org.onosproject.yangutils.utils.UtilConstants.OBJECT;
 import static org.onosproject.yangutils.utils.UtilConstants.OBJECT_STRING;
 import static org.onosproject.yangutils.utils.UtilConstants.OF;
+import static org.onosproject.yangutils.utils.UtilConstants.OMIT_NULL_VALUE_STRING;
 import static org.onosproject.yangutils.utils.UtilConstants.OPEN_CURLY_BRACKET;
 import static org.onosproject.yangutils.utils.UtilConstants.OPEN_PARENTHESIS;
 import static org.onosproject.yangutils.utils.UtilConstants.OTHER;
@@ -71,17 +80,22 @@
 import static org.onosproject.yangutils.utils.UtilConstants.STRING_DATA_TYPE;
 import static org.onosproject.yangutils.utils.UtilConstants.SUFFIX_S;
 import static org.onosproject.yangutils.utils.UtilConstants.THIS;
+import static org.onosproject.yangutils.utils.UtilConstants.TMP_VAL;
 import static org.onosproject.yangutils.utils.UtilConstants.TO;
 import static org.onosproject.yangutils.utils.UtilConstants.TRUE;
+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;
 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.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;
 
 /**
@@ -123,7 +137,7 @@
     /**
      * Returns setter string.
      *
-     * @param attr attribute info
+     * @param attr      attribute info
      * @param className java class name
      * @return setter string
      */
@@ -149,46 +163,13 @@
     /**
      * Returns default constructor method string.
      *
-     * @param name class name
+     * @param name         class name
      * @param modifierType modifier type
      * @return default constructor string
      */
     public static String getDefaultConstructorString(String name, String modifierType) {
-        return getJavaDoc(DEFAULT_CONSTRUCTOR, name, false) + getDefaultConstructor(name, modifierType);
-    }
-
-    /**
-     * Returns default constructor method string.
-     *
-     * @param attr attribute info
-     * @param className class name
-     * @return default constructor string
-     */
-    public static String getTypeDefConstructor(JavaAttributeInfo attr, String className) {
-
-        String attrQuaifiedType = getReturnType(attr);
-        String attributeName = getSmallCase(attr.getAttributeName());
-
-        if (!attr.isListAttr()) {
-            return getTypeDefConstructorString(attrQuaifiedType, attributeName, className);
-        }
-        String listAttr = getListString() + attrQuaifiedType + DIAMOND_CLOSE_BRACKET;
-        return getTypeDefConstructorString(listAttr, attributeName, className);
-    }
-
-    /**
-     * Returns type def's constructor for attribute.
-     *
-     * @param type data type
-     * @param name attribute name
-     * @param className class name
-     * @return setter for type def's attribute
-     */
-    private static String getTypeDefConstructorString(String type, String name, String className) {
-        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + className + OPEN_PARENTHESIS + type + SPACE + VALUE
-                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + THIS + PERIOD
-                + name + SPACE + EQUAL + SPACE + VALUE + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION
-                + CLOSE_CURLY_BRACKET;
+        return getJavaDoc(DEFAULT_CONSTRUCTOR, name, false) + getDefaultConstructor(name, modifierType)
+                + NEW_LINE;
     }
 
     /**
@@ -246,7 +227,7 @@
     /**
      * Returns the setter method strings for class file.
      *
-     * @param attr attribute info
+     * @param attr      attribute info
      * @param className name of the class
      * @return setter method for class
      */
@@ -265,8 +246,8 @@
      * Returns setter for attribute.
      *
      * @param className class name
-     * @param name attribute name
-     * @param type return type
+     * @param name      attribute name
+     * @param type      return type
      * @return setter for attribute
      */
     private static String getSetter(String className, String name, String type) {
@@ -316,9 +297,9 @@
     /**
      * Returns the getter method strings for interface file.
      *
-     * @param yangName name of the attribute
+     * @param yangName   name of the attribute
      * @param returnType return type of attribute
-     * @param isList is list attribute
+     * @param isList     is list attribute
      * @return getter method for interface
      */
     public static String getGetterForInterface(String yangName, String returnType, boolean isList) {
@@ -334,7 +315,7 @@
      * Returns getter for attribute in interface.
      *
      * @param returnType return type
-     * @param yangName attribute name
+     * @param yangName   attribute name
      * @return getter for interface
      */
     private static String getGetterInterfaceString(String returnType, String yangName) {
@@ -345,10 +326,10 @@
     /**
      * Returns the setter method strings for interface file.
      *
-     * @param attrName name of the attribute
-     * @param attrType return type of attribute
+     * @param attrName  name of the attribute
+     * @param attrType  return type of attribute
      * @param className name of the java class being generated
-     * @param isList is list attribute
+     * @param isList    is list attribute
      * @return setter method for interface
      */
     public static String getSetterForInterface(String attrName, String attrType, String className, boolean isList) {
@@ -364,8 +345,8 @@
      * Returns setter string for interface.
      *
      * @param className class name
-     * @param attrName attribute name
-     * @param attrType attribute type
+     * @param attrName  attribute name
+     * @param attrType  attribute type
      * @return setter string
      */
     private static String getSetterInterfaceString(String className, String attrName, String attrType) {
@@ -428,7 +409,7 @@
      * Returns the constructor strings for class file.
      *
      * @param yangName name of the class
-     * @param attr attribute info
+     * @param attr     attribute info
      * @return constructor for class
      */
     public static String getConstructor(String yangName, JavaAttributeInfo attr) {
@@ -459,7 +440,7 @@
     /**
      * Returns the Default constructor strings for class file.
      *
-     * @param name name of the class
+     * @param name         name of the class
      * @param modifierType modifier type for default constructor
      * @return Default constructor for class
      */
@@ -469,9 +450,9 @@
     }
 
     /**
-     * Returns to string method open strings.
+     * Returns to string method's open strings.
      *
-     * @return to string method open string
+     * @return string method's open string
      */
     public static String getToStringMethodOpen() {
         return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STRING_DATA_TYPE + SPACE + TO
@@ -480,7 +461,16 @@
     }
 
     /**
-     * Returns to string methods close string.
+     * Returns omit null value string.
+     *
+     * @return omit null value string
+     */
+    public static String getOmitNullValueString() {
+        return TWELVE_SPACE_INDENTATION + PERIOD + OMIT_NULL_VALUE_STRING + NEW_LINE;
+    }
+
+    /**
+     * Returns to string method's close string.
      *
      * @return to string method close string
      */
@@ -503,6 +493,90 @@
     }
 
     /**
+     * Returns from string method's open string.
+     *
+     * @param className name of the class
+     * @return from string method's open string
+     */
+    public static String getFromStringMethodSignature(String className) {
+        return getJavaDoc(UNION_FROM_METHOD, className, false) + FOUR_SPACE_INDENTATION + PUBLIC + SPACE
+                + className + SPACE + FROM_STRING_METHOD_NAME + OPEN_PARENTHESIS + STRING_DATA_TYPE + SPACE
+                + FROM_STRING_PARAM_NAME + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
+    }
+
+    /**
+     * Return from string method's close string.
+     *
+     * @return from string method's close string
+     */
+    public static String getFromStringMethodClose() {
+        return EIGHT_SPACE_INDENTATION + RETURN + SPACE + NULL + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION +
+                CLOSE_CURLY_BRACKET + NEW_LINE;
+    }
+
+    /**
+     * Return from string method's body string.
+     *
+     * @param attr                    attribute info
+     * @param fromStringAttributeInfo attribute info for the from string
+     *                                wrapper type
+     * @return from string method's body string
+     */
+    public static String getFromStringMethod(JavaAttributeInfo attr,
+                                             JavaAttributeInfo fromStringAttributeInfo) {
+
+        return EIGHT_SPACE_INDENTATION + getTrySubString() + NEW_LINE + TWELVE_SPACE_INDENTATION
+                + getParsedSubString(attr, fromStringAttributeInfo) + SEMI_COLAN + NEW_LINE + TWELVE_SPACE_INDENTATION
+                + getReturnOfSubString() + NEW_LINE + EIGHT_SPACE_INDENTATION + getCatchSubString()
+                + NEW_LINE + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
+    }
+
+    /**
+     * Returns sub string with try statement for union's from string method.
+     *
+     * @return sub string with try statement for union's from string method
+     */
+    public static String getTrySubString() {
+        return TRY + SPACE + OPEN_CURLY_BRACKET;
+    }
+
+    /**
+     * Returns sub string with return statement for union's from string method.
+     *
+     * @return sub string with return statement for union's from string method
+     */
+    public static String getReturnOfSubString() {
+        return RETURN + SPACE + OF + OPEN_PARENTHESIS + TMP_VAL + CLOSE_PARENTHESIS + SEMI_COLAN;
+    }
+
+    /**
+     * Returns sub string with catch statement for union's from string method.
+     *
+     * @return sub string with catch statement for union's from string method
+     */
+    public static String getCatchSubString() {
+        return CLOSE_CURLY_BRACKET + SPACE + CATCH + SPACE + OPEN_PARENTHESIS + EXCEPTION + SPACE + EXCEPTION_VAR
+                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET;
+    }
+
+    /**
+     * Returns sub string with parsed statement for union's from string method.
+     *
+     * @param attr attribute info
+     * @return sub string with parsed statement for union's from string method
+     */
+    private static String getParsedSubString(JavaAttributeInfo attr,
+                                             JavaAttributeInfo fromStringAttributeInfo) {
+
+        String targetDataType = getReturnType(attr);
+        String parseFromStringMethod = getParseFromStringMethod(targetDataType,
+                fromStringAttributeInfo.getAttributeType());
+        return targetDataType + SPACE + TMP_VAL + SPACE + EQUAL + SPACE + parseFromStringMethod
+                + OPEN_PARENTHESIS + FROM_STRING_PARAM_NAME + CLOSE_PARENTHESIS;
+    }
+
+
+    /**
      * Returns hash code method open strings.
      *
      * @return hash code method open string
@@ -611,9 +685,10 @@
      */
     public static String getOfMethod(String name, JavaAttributeInfo attr) {
 
-        String attrQuaifiedType = getReturnType(attr);
+        String attrQualifiedType = getReturnType(attr);
+
         return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STATIC + SPACE + name + SPACE + OF + OPEN_PARENTHESIS
-                + attrQuaifiedType + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
+                + attrQualifiedType + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                 + EIGHT_SPACE_INDENTATION + RETURN + SPACE + NEW + SPACE + name + OPEN_PARENTHESIS + VALUE
                 + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
     }
@@ -635,6 +710,69 @@
     }
 
     /**
+     * Returns of method's string and java doc for special type.
+     *
+     * @param attr                   attribute info
+     * @param generatedJavaClassName class name
+     * @return of method's string and java doc for special type
+     */
+    public static String getOfMethodStringAndJavaDoc(JavaAttributeInfo attr, String generatedJavaClassName) {
+
+        String attrType = getReturnType(attr);
+        String attrName = getSmallCase(attr.getAttributeName());
+
+        return getJavaDoc(OF_METHOD, generatedJavaClassName + " for type " + attrName, false)
+                + getOfMethodString(attrType, generatedJavaClassName);
+    }
+
+    /**
+     * Returns of method's string.
+     *
+     * @param type      data type
+     * @param className class name
+     * @return of method's string
+     */
+    private static String getOfMethodString(String type, String className) {
+
+        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STATIC + SPACE + className + SPACE + OF + OPEN_PARENTHESIS
+                + type + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
+                + EIGHT_SPACE_INDENTATION + RETURN + SPACE + NEW + SPACE + className + OPEN_PARENTHESIS + VALUE
+                + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
+    }
+
+    /**
+     * Returns string and java doc for constructor of type class.
+     *
+     * @param attr                   attribute info
+     * @param generatedJavaClassName class name
+     * @return string and java doc for constructor of type class
+     */
+    public static String getTypeConstructorStringAndJavaDoc(JavaAttributeInfo attr, String generatedJavaClassName) {
+
+        String attrType = getReturnType(attr);
+        String attrName = getSmallCase(attr.getAttributeName());
+
+        return getJavaDoc(TYPE_CONSTRUCTOR, generatedJavaClassName + " for type " + attrName, false)
+                + getTypeConstructorString(attrType, attrName, generatedJavaClassName);
+    }
+
+    /**
+     * Returns type constructor string.
+     *
+     * @param type      data type
+     * @param name      attribute name
+     * @param className class name
+     * @return type constructor string
+     */
+    private static String getTypeConstructorString(String type, String name, String className) {
+
+        return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + className + OPEN_PARENTHESIS + type + SPACE + VALUE
+                + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + THIS + PERIOD
+                + name + SPACE + EQUAL + SPACE + VALUE + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION
+                + CLOSE_CURLY_BRACKET;
+    }
+
+    /**
      * Returns implementation of get augment info list method of HasAugmentation class.
      *
      * @return implementation of get augment info list method of HasAugmentation class
@@ -660,7 +798,7 @@
         method = method + getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE + "remove"
                 + AUGMENTATION + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                 + EIGHT_SPACE_INDENTATION + GET_METHOD_PREFIX + AUGMENTED_INFO + LIST + OPEN_PARENTHESIS
-                + CLOSE_PARENTHESIS + PERIOD + "clear" + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE
+                + CLOSE_PARENTHESIS + PERIOD + CLEAR + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE
                 + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
         return method;
     }
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/YangJavaModelUtils.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/YangJavaModelUtils.java
index 6716251..c706b7d 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/YangJavaModelUtils.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/YangJavaModelUtils.java
@@ -17,7 +17,7 @@
 package org.onosproject.yangutils.translator.tojava.utils;
 
 import java.io.IOException;
-
+import org.onosproject.yangutils.datamodel.HasType;
 import org.onosproject.yangutils.datamodel.YangAugment;
 import org.onosproject.yangutils.datamodel.YangCase;
 import org.onosproject.yangutils.datamodel.YangChoice;
@@ -54,7 +54,7 @@
      * Updates YANG java file package information.
      *
      * @param javaCodeGeneratorInfo YANG java file info node
-     * @param yangPlugin YANG plugin config
+     * @param yangPlugin            YANG plugin config
      * @throws IOException IO operations fails
      */
     private static void updatePackageInfo(JavaCodeGeneratorInfo javaCodeGeneratorInfo, YangPluginConfig yangPlugin)
@@ -72,11 +72,11 @@
      * Updates YANG java file package information for specified package.
      *
      * @param javaCodeGeneratorInfo YANG java file info node
-     * @param yangPlugin YANG plugin config
+     * @param yangPlugin            YANG plugin config
      * @throws IOException IO operations fails
      */
     private static void updatePackageInfo(JavaCodeGeneratorInfo javaCodeGeneratorInfo, YangPluginConfig yangPlugin,
-            String pkg)
+                                          String pkg)
             throws IOException {
         javaCodeGeneratorInfo.getJavaFileInfo()
                 .setJavaName(getCaptialCase(
@@ -113,9 +113,11 @@
         if (javaCodeGeneratorInfo instanceof YangLeavesHolder) {
             javaCodeGeneratorInfo.getTempJavaCodeFragmentFiles()
                     .addCurNodeLeavesInfoToTempFiles((YangNode) javaCodeGeneratorInfo);
+        } else if (javaCodeGeneratorInfo instanceof HasType) {
+            javaCodeGeneratorInfo.getTempJavaCodeFragmentFiles()
+                    .addTypeInfoToTempFiles((HasType) javaCodeGeneratorInfo);
         } else {
-            // TODO: either write a util for ENUM and UNION or, call the
-            // corresponding implementation in ENUM and UNION
+            //TODO throw exception
         }
     }
 
@@ -123,7 +125,7 @@
      * Process generate code entry of YANG node.
      *
      * @param javaCodeGeneratorInfo YANG java file info node
-     * @param codeGenDir code generation directory
+     * @param codeGenDir            code generation directory
      * @throws IOException IO operations fails
      */
     private static void generateTempFiles(JavaCodeGeneratorInfo javaCodeGeneratorInfo, String codeGenDir)
@@ -140,12 +142,12 @@
      * Process generate code entry of YANG node.
      *
      * @param javaCodeGeneratorInfo YANG java file info node
-     * @param yangPlugin YANG plugin config
-     * @param isMultiInstance flag to indicate whether it's a list
+     * @param yangPlugin            YANG plugin config
+     * @param isMultiInstance       flag to indicate whether it's a list
      * @throws IOException IO operations fails
      */
     public static void generateCodeOfNode(JavaCodeGeneratorInfo javaCodeGeneratorInfo, YangPluginConfig yangPlugin,
-            boolean isMultiInstance) throws IOException {
+                                          boolean isMultiInstance) throws IOException {
         if (!(javaCodeGeneratorInfo instanceof YangNode)) {
             // TODO:throw exception
         }
@@ -172,15 +174,32 @@
     }
 
     /**
+     * Process generate code entry of YANG type.
+     *
+     * @param javaCodeGeneratorInfo YANG java file info node
+     * @param yangPlugin            YANG plugin config
+     * @param isMultiInstance       flag to indicate whether it's a list
+     * @throws IOException IO operations fails
+     */
+    public static void generateCodeOfType(JavaCodeGeneratorInfo javaCodeGeneratorInfo, YangPluginConfig yangPlugin,
+                                          boolean isMultiInstance) throws IOException {
+        if (!(javaCodeGeneratorInfo instanceof YangNode)) {
+            // TODO:throw exception
+        }
+        updatePackageInfo(javaCodeGeneratorInfo, yangPlugin);
+        generateTempFiles(javaCodeGeneratorInfo, yangPlugin.getCodeGenDir());
+    }
+
+    /**
      * Process generate code entry of root node.
      *
      * @param javaCodeGeneratorInfo YANG java file info node
-     * @param yangPlugin YANG plugin config
-     * @param rootPkg package of the root node
+     * @param yangPlugin            YANG plugin config
+     * @param rootPkg               package of the root node
      * @throws IOException IO operations fails
      */
     public static void generateCodeOfRootNode(JavaCodeGeneratorInfo javaCodeGeneratorInfo, YangPluginConfig yangPlugin,
-            String rootPkg) throws IOException {
+                                              String rootPkg) throws IOException {
         if (!(javaCodeGeneratorInfo instanceof YangNode)) {
             // TODO:throw exception
         }