[ONOS-4286],[ONOS-3911] YANG typedef and YANG augment
                        translator implementation.

Change-Id: I3e21d1cb52bcb90b935b672eee42b836c21f448b
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 3dffc96..077e39f 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
@@ -16,35 +16,19 @@
 
 package org.onosproject.yangutils.translator.tojava.utils;
 
-import java.util.Set;
-import java.util.TreeSet;
-
 import org.onosproject.yangutils.datamodel.YangDataTypes;
+import org.onosproject.yangutils.datamodel.YangDerivedInfo;
+import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.datamodel.YangType;
-import org.onosproject.yangutils.translator.tojava.JavaQualifiedTypeInfo;
+import org.onosproject.yangutils.datamodel.YangTypeDef;
+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 static org.onosproject.yangutils.datamodel.YangDataTypes.BINARY;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.BITS;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.BOOLEAN;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.DECIMAL64;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.DERIVED;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.EMPTY;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.ENUMERATION;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.IDENTITYREF;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.INSTANCE_IDENTIFIER;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.INT16;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.INT32;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.INT64;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.INT8;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.LEAFREF;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.STRING;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.UINT16;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.UINT32;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.UINT64;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.UINT8;
-import static org.onosproject.yangutils.datamodel.YangDataTypes.UNION;
 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.utils.UtilConstants.BIG_INTEGER;
 import static org.onosproject.yangutils.utils.UtilConstants.BOOLEAN_DATA_TYPE;
 import static org.onosproject.yangutils.utils.UtilConstants.BOOLEAN_WRAPPER;
 import static org.onosproject.yangutils.utils.UtilConstants.BYTE;
@@ -52,8 +36,10 @@
 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.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.STRING_DATA_TYPE;
@@ -63,8 +49,6 @@
  */
 public final class AttributesJavaDataType {
 
-    private static Set<JavaQualifiedTypeInfo> importInfo = new TreeSet<>();
-
     /**
      * Creates an instance of attribute java data type.
      */
@@ -72,26 +56,6 @@
     }
 
     /**
-     * Returns import info.
-     *
-     * @return import info
-     */
-    public static Set<JavaQualifiedTypeInfo> getImportInfo() {
-
-        return importInfo;
-    }
-
-    /**
-     * Adds import info to the import info set.
-     *
-     * @param importData import info
-     */
-    public static void addImportInfo(JavaQualifiedTypeInfo importData) {
-
-        getImportInfo().add(importData);
-    }
-
-    /**
      * Returns java type.
      *
      * @param yangType YANG type
@@ -101,48 +65,32 @@
 
         YangDataTypes type = yangType.getDataType();
 
-        if (type.equals(INT8)) {
-            return BYTE;
-        } else if (type.equals(INT16)) {
-            return SHORT;
-        } else if (type.equals(INT32)) {
-            return INT;
-        } else if (type.equals(INT64)) {
-            return LONG;
-        } else if (type.equals(UINT8)) {
-            return SHORT;
-        } else if (type.equals(UINT16)) {
-            return INT;
-        } else if (type.equals(UINT32)) {
-            return LONG;
-        } else if (type.equals(UINT64)) {
-            //TODO: BIGINTEGER.
-        } else if (type.equals(DECIMAL64)) {
-            //TODO: DECIMAL64.
-        } else if (type.equals(STRING)) {
-            return STRING_DATA_TYPE;
-        } else if (type.equals(BOOLEAN)) {
-            return BOOLEAN_DATA_TYPE;
-        } else if (type.equals(ENUMERATION)) {
-            //TODO: ENUMERATION.
-        } else if (type.equals(BITS)) {
-            //TODO:BITS
-        } else if (type.equals(BINARY)) {
-            //TODO:BINARY
-        } else if (type.equals(LEAFREF)) {
-            //TODO:LEAFREF
-        } else if (type.equals(IDENTITYREF)) {
-            //TODO:IDENTITYREF
-        } else if (type.equals(EMPTY)) {
-            //TODO:EMPTY
-        } else if (type.equals(UNION)) {
-            //TODO:UNION
-        } else if (type.equals(INSTANCE_IDENTIFIER)) {
-            //TODO:INSTANCE_IDENTIFIER
-        } else if (type.equals(DERIVED)) {
-            return yangType.getDataTypeName();
+        switch (type) {
+            case INT8:
+                return BYTE;
+            case INT16:
+                return SHORT;
+            case INT32:
+                return INT;
+            case INT64:
+                return LONG;
+            case UINT8:
+                return SHORT;
+            case UINT16:
+                return INT;
+            case UINT32:
+                return LONG;
+            case UINT64:
+                return BIG_INTEGER;
+            case DECIMAL64:
+                //TODO: DECIMAL64.
+            case STRING:
+                return STRING_DATA_TYPE;
+            case BOOLEAN:
+                return BOOLEAN_DATA_TYPE;
+            default:
+                throw new TranslatorException("given data type is not supported.");
         }
-        return null;
     }
 
     /**
@@ -157,75 +105,80 @@
         YangDataTypes type = yangType.getDataType();
 
         if (isListAttr) {
-            if (type.equals(INT8)) {
-                return BYTE_WRAPPER;
-            } else if (type.equals(INT16)) {
-                return SHORT_WRAPPER;
-            } else if (type.equals(INT32)) {
-                return INTEGER_WRAPPER;
-            } else if (type.equals(INT64)) {
-                return LONG_WRAPPER;
-            } else if (type.equals(UINT8)) {
-                return SHORT_WRAPPER;
-            } else if (type.equals(UINT16)) {
-                return INTEGER_WRAPPER;
-            } else if (type.equals(UINT32)) {
-                return LONG_WRAPPER;
-            } else if (type.equals(UINT64)) {
-                //TODO: BIGINTEGER.
-            } else if (type.equals(DECIMAL64)) {
-                //TODO: DECIMAL64.
-            } else if (type.equals(STRING)) {
-                return STRING_DATA_TYPE;
-            } else if (type.equals(BOOLEAN)) {
-                return BOOLEAN_WRAPPER;
-            } else if (type.equals(ENUMERATION)) {
-                //TODO: ENUMERATION.
-            } else if (type.equals(BITS)) {
-                //TODO:BITS
-            } else if (type.equals(BINARY)) {
-                //TODO:BINARY
-            } else if (type.equals(LEAFREF)) {
-                //TODO:LEAFREF
-            } else if (type.equals(IDENTITYREF)) {
-                //TODO:IDENTITYREF
-            } else if (type.equals(EMPTY)) {
-                //TODO:EMPTY
-            } else if (type.equals(UNION)) {
-                //TODO:UNION
-            } else if (type.equals(INSTANCE_IDENTIFIER)) {
-                //TODO:INSTANCE_IDENTIFIER
-            } else if (type.equals(DERIVED)) {
-                return getCaptialCase(getCamelCase(yangType.getDataTypeName(), null));
+            switch (type) {
+                case INT8:
+                    return BYTE_WRAPPER;
+                case INT16:
+                    return SHORT_WRAPPER;
+                case INT32:
+                    return INTEGER_WRAPPER;
+                case INT64:
+                    return LONG_WRAPPER;
+                case UINT8:
+                    return SHORT_WRAPPER;
+                case UINT16:
+                    return INTEGER_WRAPPER;
+                case UINT32:
+                    return LONG_WRAPPER;
+                case UINT64:
+                    return BIG_INTEGER;
+                case DECIMAL64:
+                    //TODO: DECIMAL64.
+                case STRING:
+                    return STRING_DATA_TYPE;
+                case BOOLEAN:
+                    return BOOLEAN_WRAPPER;
+                case ENUMERATION:
+                    //TODO: ENUMERATION.
+                case BITS:
+                    //TODO:BITS
+                case BINARY:
+                    //TODO:BINARY
+                case LEAFREF:
+                    //TODO:LEAFREF
+                case IDENTITYREF:
+                    //TODO:IDENTITYREF
+                case EMPTY:
+                    return BOOLEAN_WRAPPER;
+                case UNION:
+                    //TODO:UNION
+                case INSTANCE_IDENTIFIER:
+                    //TODO:INSTANCE_IDENTIFIER
+                case DERIVED:
+                    return getCaptialCase(getCamelCase(yangType.getDataTypeName(), null));
+                default:
+                    throw new TranslatorException("given data type is not supported.");
             }
         } else {
-            if (type.equals(UINT64)) {
-                //TODO: BIGINTEGER.
-            } else if (type.equals(DECIMAL64)) {
-                //TODO: DECIMAL64.
-            } else if (type.equals(STRING)) {
-                return STRING_DATA_TYPE;
-            } else if (type.equals(ENUMERATION)) {
-                //TODO: ENUMERATION.
-            } else if (type.equals(BITS)) {
-                //TODO:BITS
-            } else if (type.equals(BINARY)) {
-                //TODO:BINARY
-            } else if (type.equals(LEAFREF)) {
-                //TODO:LEAFREF
-            } else if (type.equals(IDENTITYREF)) {
-                //TODO:IDENTITYREF
-            } else if (type.equals(EMPTY)) {
-                //TODO:EMPTY
-            } else if (type.equals(UNION)) {
-                //TODO:UNION
-            } else if (type.equals(INSTANCE_IDENTIFIER)) {
-                //TODO:INSTANCE_IDENTIFIER
-            } else if (type.equals(DERIVED)) {
-                return getCaptialCase(getCamelCase(yangType.getDataTypeName(), null));
+            switch (type) {
+                case UINT64:
+                    return BIG_INTEGER;
+                case DECIMAL64:
+                    //TODO: DECIMAL64.
+                case STRING:
+                    return STRING_DATA_TYPE;
+                case ENUMERATION:
+                    //TODO: ENUMERATION.
+                case BITS:
+                    //TODO:BITS
+                case BINARY:
+                    //TODO:BINARY
+                case LEAFREF:
+                    //TODO:LEAFREF
+                case IDENTITYREF:
+                    //TODO:IDENTITYREF
+                case EMPTY:
+                    //TODO:EMPTY
+                case UNION:
+                    //TODO:UNION
+                case INSTANCE_IDENTIFIER:
+                    //TODO:INSTANCE_IDENTIFIER
+                case DERIVED:
+                    return getCaptialCase(getCamelCase(yangType.getDataTypeName(), null));
+                default:
+                    return null;
             }
         }
-        return null;
     }
 
     /**
@@ -241,75 +194,108 @@
         YangDataTypes type = yangType.getDataType();
 
         if (isListAttr) {
-            if (type.equals(INT8)
-                    || type.equals(INT16)
-                    || type.equals(INT32)
-                    || type.equals(INT64)
-                    || type.equals(UINT8)
-                    || type.equals(UINT16)
-                    || type.equals(UINT32)
-                    || type.equals(STRING)
-                    || type.equals(BOOLEAN)) {
-                return JAVA_LANG;
-            } else if (type.equals(UINT64)) {
-                //TODO: BIGINTEGER.
-            } else if (type.equals(DECIMAL64)) {
-                //TODO: DECIMAL64.
-            } else if (type.equals(ENUMERATION)) {
-                //TODO: ENUMERATION.
-            } else if (type.equals(BITS)) {
-                //TODO:BITS
-            } else if (type.equals(BINARY)) {
-                //TODO:BINARY
-            } else if (type.equals(LEAFREF)) {
-                //TODO:LEAFREF
-            } else if (type.equals(IDENTITYREF)) {
-                //TODO:IDENTITYREF
-            } else if (type.equals(EMPTY)) {
-                //TODO:EMPTY
-            } else if (type.equals(UNION)) {
-                //TODO:UNION
-            } else if (type.equals(INSTANCE_IDENTIFIER)) {
-                //TODO:INSTANCE_IDENTIFIER
-            } else if (type.equals(DERIVED)) {
-                for (JavaQualifiedTypeInfo imports : getImportInfo()) {
-                    if (imports.getClassInfo().equals(classInfo)) {
-                        return imports.getPkgInfo();
-                    }
-                }
+            switch (type) {
+                case INT8:
+                case INT16:
+                case INT32:
+                case INT64:
+                case UINT8:
+                case UINT16:
+                case UINT32:
+                case STRING:
+                case BOOLEAN:
+                    return JAVA_LANG;
+                case UINT64:
+                    return JAVA_MATH;
+                case DECIMAL64:
+                    //TODO: DECIMAL64.
+                case ENUMERATION:
+                    //TODO: ENUMERATION.
+                case BITS:
+                    //TODO:BITS
+                case BINARY:
+                    //TODO:BINARY
+                case LEAFREF:
+                    //TODO:LEAFREF
+                case IDENTITYREF:
+                    //TODO:IDENTITYREF
+                case EMPTY:
+                    //TODO:EMPTY
+                case UNION:
+                    //TODO:UNION
+                case INSTANCE_IDENTIFIER:
+                    //TODO:INSTANCE_IDENTIFIER
+                case DERIVED:
+                    return getTypDefsPackage(yangType);
+                default:
+                    throw new TranslatorException("given data type is not supported.");
             }
         } else {
-
-            if (type.equals(UINT64)) {
-                //TODO: BIGINTEGER.
-            } else if (type.equals(DECIMAL64)) {
-                //TODO: DECIMAL64.
-            } else if (type.equals(STRING)) {
-                return JAVA_LANG;
-            } else if (type.equals(ENUMERATION)) {
-                //TODO: ENUMERATION.
-            } else if (type.equals(BITS)) {
-                //TODO:BITS
-            } else if (type.equals(BINARY)) {
-                //TODO:BINARY
-            } else if (type.equals(LEAFREF)) {
-                //TODO:LEAFREF
-            } else if (type.equals(IDENTITYREF)) {
-                //TODO:IDENTITYREF
-            } else if (type.equals(EMPTY)) {
-                //TODO:EMPTY
-            } else if (type.equals(UNION)) {
-                //TODO:UNION
-            } else if (type.equals(INSTANCE_IDENTIFIER)) {
-                //TODO:INSTANCE_IDENTIFIER
-            } else if (type.equals(DERIVED)) {
-                for (JavaQualifiedTypeInfo imports : getImportInfo()) {
-                    if (imports.getClassInfo().equals(classInfo)) {
-                        return imports.getPkgInfo();
-                    }
-                }
+            switch (type) {
+                case UINT64:
+                    //TODO: BIGINTEGER.
+                case DECIMAL64:
+                    //TODO: DECIMAL64
+                case STRING:
+                    return JAVA_LANG;
+                case ENUMERATION:
+                    //TODO: ENUMERATION.
+                case BITS:
+                    //TODO:BITS
+                case BINARY:
+                    //TODO:BINARY
+                case LEAFREF:
+                    //TODO:LEAFREF
+                case IDENTITYREF:
+                    //TODO:IDENTITYREF
+                case EMPTY:
+                    //TODO:EMPTY
+                case UNION:
+                    //TODO:UNION
+                case INSTANCE_IDENTIFIER:
+                    //TODO:INSTANCE_IDENTIFIER
+                case DERIVED:
+                    return getTypDefsPackage(yangType);
+                default:
+                    return null;
             }
         }
-        return null;
+    }
+
+    /**
+     * Returns java package for typedef node.
+     *
+     * @param type YANG type
+     * @return java package for typedef node
+     */
+    private static String getTypDefsPackage(YangType<?> type) {
+        Object var = type.getDataTypeExtendedInfo();
+        if (!(var instanceof YangDerivedInfo)) {
+            throw new TranslatorException("type should have been derived.");
+        }
+
+        if (!(((YangDerivedInfo<?>) var).getReferredTypeDef() instanceof YangTypeDef)) {
+            throw new TranslatorException("derived info is not an instance of typedef.");
+        }
+
+        YangJavaTypeDef typedef = (YangJavaTypeDef) ((YangDerivedInfo<?>) var).getReferredTypeDef();
+        if (typedef.getJavaFileInfo().getPackage() == null) {
+            return getPackageFromParent(typedef.getParent());
+        }
+        return typedef.getJavaFileInfo().getPackage();
+    }
+
+    /**
+     * Returns package from parent node.
+     *
+     * @param parent parent YANG node
+     * @return java package from parent node
+     */
+    private static String getPackageFromParent(YangNode parent) {
+        if (!(parent instanceof HasJavaFileInfo)) {
+            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 e1ea084..f3adba0 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
@@ -21,8 +21,12 @@
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_TYPEDEF_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;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.isExtendsList;
 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.EXTEND;
 import static org.onosproject.yangutils.utils.UtilConstants.FINAL;
 import static org.onosproject.yangutils.utils.UtilConstants.IMPL;
 import static org.onosproject.yangutils.utils.UtilConstants.IMPLEMENTS;
@@ -32,6 +36,7 @@
 import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
 import static org.onosproject.yangutils.utils.UtilConstants.PUBLIC;
 import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
+import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.trimAtLast;
 
 /**
  * Represents generator for class definition of generated files.
@@ -84,8 +89,16 @@
      * @return definition
      */
     private static String getInterfaceDefinition(String yangName) {
+        if (!isExtendsList()) {
+            return PUBLIC + SPACE + INTERFACE + SPACE + yangName + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
+        }
+        String def = PUBLIC + SPACE + INTERFACE + SPACE + yangName + SPACE + EXTEND + SPACE;
+        for (String extend : getExtendsList()) {
+            def = def + extend + COMMA;
+        }
+        def = trimAtLast(def, COMMA);
 
-        return PUBLIC + SPACE + INTERFACE + SPACE + yangName + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
+        return def + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
     }
 
     /**
@@ -96,7 +109,6 @@
      * @return definition
      */
     private static String getBuilderInterfaceDefinition(String yangName) {
-
         return INTERFACE + SPACE + yangName + BUILDER + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + NEW_LINE;
     }
 
@@ -107,7 +119,6 @@
      * @return definition
      */
     private static String getBuilderClassDefinition(String yangName) {
-
         return PUBLIC + SPACE + CLASS + SPACE + yangName + BUILDER + SPACE + IMPLEMENTS + SPACE + yangName + PERIOD
                 + yangName + BUILDER + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
     }
@@ -119,7 +130,6 @@
      * @return definition
      */
     private static String getImplClassDefinition(String yangName) {
-
         return PUBLIC + SPACE + FINAL + SPACE + CLASS + SPACE + yangName + IMPL + SPACE + IMPLEMENTS + SPACE + yangName
                 + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
     }
@@ -131,7 +141,6 @@
      * @return definition
      */
     private static String getTypeDefClassDefinition(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/JavaCodeSnippetGen.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaCodeSnippetGen.java
index 861ef4d..07da946 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaCodeSnippetGen.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/JavaCodeSnippetGen.java
@@ -20,12 +20,20 @@
 
 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.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.DIAMOND_CLOSE_BRACKET;
 import static org.onosproject.yangutils.utils.UtilConstants.DIAMOND_OPEN_BRACKET;
+import static org.onosproject.yangutils.utils.UtilConstants.EQUAL;
+import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
 import static org.onosproject.yangutils.utils.UtilConstants.IMPORT;
 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.OPEN_PARENTHESIS;
 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;
@@ -127,6 +135,18 @@
     }
 
     /**
+     * Returns attribute of augmented info for generated impl file.
+     *
+     * @return attribute of augmented info for generated impl file
+     */
+    public static String getAugmentedInfoAttribute() {
+        return FOUR_SPACE_INDENTATION + PRIVATE + SPACE + getListAttribute(AUGMENTED_INFO) + SPACE
+                + getSmallCase(AUGMENTED_INFO) + LIST + SPACE + EQUAL + SPACE + NEW + SPACE + ARRAY_LIST
+                + DIAMOND_OPEN_BRACKET + DIAMOND_CLOSE_BRACKET + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN
+                + NEW_LINE;
+    }
+
+    /**
      * Returns based on the file type and the YANG name of the file, generate the class
      * / interface definition close.
      *
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 7a30be8..08b3072 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
@@ -40,16 +40,21 @@
 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.utils.JavaCodeSnippetGen.getAugmentedInfoAttribute;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getDataFromTempFileHandle;
 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.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.getEqualsMethodClose;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getEqualsMethodOpen;
 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.getRemoveAugmentationImpl;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getToStringMethodClose;
 import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getToStringMethodOpen;
+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.EMPTY_STRING;
@@ -67,12 +72,58 @@
 public final class JavaFileGenerator {
 
     /**
-     * Creates an instance of java file generator.
+     * Flag to check whether generated interface file need to extends any class.
      */
+    private static boolean isExtendsList = false;
+
+    /**
+     * List of classes to be extended by generated interface file.
+     */
+    private static List<String> extendsList = new ArrayList<>();
+
+    /**
+    * Creates an instance of java file generator.
+    */
     private JavaFileGenerator() {
     }
 
     /**
+     * Returns true if extends list is not empty.
+     *
+     * @return true or false
+     */
+    public static boolean isExtendsList() {
+        return isExtendsList;
+    }
+
+    /**
+     * Sets the value of is extends list.
+     *
+     * @param isExtends true or false
+     */
+    public static void setIsExtendsList(boolean isExtends) {
+        isExtendsList = isExtends;
+    }
+
+    /**
+     * Returns list of extended classes.
+     *
+     * @return list of extended classes
+     */
+    public static List<String> getExtendsList() {
+        return extendsList;
+    }
+
+    /**
+     * Sets the list of extended classes.
+     *
+     * @param extendList list of extended classes
+     */
+    public static void setExtendsList(List<String> extendList) {
+        extendsList = extendList;
+    }
+
+    /**
      * Returns generated interface file for current node.
      *
      * @param file file
@@ -91,6 +142,7 @@
         String path = javaFileInfo.getBaseCodeGenPath() + javaFileInfo.getPackageFilePath();
 
         initiateJavaFileGeneration(file, className, INTERFACE_MASK, imports, path);
+
         if (isAttrPresent) {
             /**
              * Add getter methods to interface file.
@@ -258,6 +310,12 @@
                         + " while impl class file generation");
             }
 
+            /**
+             * Add attribute for augmented info's list.
+             */
+            if (isHasAugmentationExtended(getExtendsList())) {
+                insertDataIntoJavaFile(file, getAugmentedInfoAttribute());
+            }
             insertDataIntoJavaFile(file, NEW_LINE);
             try {
                 /**
@@ -298,6 +356,16 @@
             throw new IOException("No data found in temporary java code fragment files for " + className
                     + " while impl class file generation");
         }
+
+        /**
+         * Add method for augment info's list.
+         */
+        if (isHasAugmentationExtended(getExtendsList())) {
+            methods.add(getAddAugmentInfoMethodImpl());
+            methods.add(getAugmentInfoListImpl());
+            methods.add(getRemoveAugmentationImpl());
+        }
+
         /**
          * Add methods in impl class.
          */
@@ -310,7 +378,7 @@
     }
 
     /**
-     * Generate class file for type def.
+     * Generates class file for type def.
      *
      * @param file generated file
      * @param curNode current YANG node
@@ -364,11 +432,6 @@
             methods.add(getDataFromTempFileHandle(GETTER_FOR_CLASS_MASK, curNode));
 
             /**
-             * Setter method.
-             */
-            methods.add(((HasTempJavaCodeFragmentFiles) curNode).getTempJavaCodeFragmentFiles().addTypeDefsSetter());
-
-            /**
              * Hash code method.
              */
             methods.add(getHashCodeMethodClose(getHashCodeMethodOpen() + partString(
@@ -388,7 +451,7 @@
 
         } catch (IOException e) {
             throw new IOException("No data found in temporary java code fragment files for " + className
-                    + " while tyoe def class file generation");
+                    + " while type def class file generation");
         }
 
         for (String method : methods) {
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 90c122b..154090d 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
@@ -23,6 +23,8 @@
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getSmallCase;
 import static org.onosproject.yangutils.utils.UtilConstants.ADD_STRING;
 import static org.onosproject.yangutils.utils.UtilConstants.AND;
+import static org.onosproject.yangutils.utils.UtilConstants.AUGMENTATION;
+import static org.onosproject.yangutils.utils.UtilConstants.AUGMENTED_INFO;
 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;
@@ -100,7 +102,6 @@
      * @return method string for builder interface
      */
     public static String parseBuilderInterfaceBuildMethodString(String name) {
-
         return getJavaDoc(BUILD_METHOD, name, false) + getBuildForInterface(name);
     }
 
@@ -142,7 +143,6 @@
      * @return constructor string
      */
     public static String getConstructorString(String name) {
-
         return getJavaDoc(CONSTRUCTOR, name, false);
     }
 
@@ -154,7 +154,6 @@
      * @return default constructor string
      */
     public static String getDefaultConstructorString(String name, String modifierType) {
-
         return getJavaDoc(DEFAULT_CONSTRUCTOR, name, false) + getDefaultConstructor(name, modifierType);
     }
 
@@ -186,7 +185,6 @@
      * @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
@@ -200,7 +198,6 @@
      * @return check not null string
      */
     public static String getCheckNotNull(String name) {
-
         return EIGHT_SPACE_INDENTATION + CHECK_NOT_NULL_STRING + OPEN_PARENTHESIS + name + COMMA + SPACE + name
                 + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE;
     }
@@ -212,7 +209,6 @@
      * @return build string
      */
     public static String getBuildString(String name) {
-
         return FOUR_SPACE_INDENTATION + OVERRIDE + NEW_LINE + getBuild(name);
     }
 
@@ -242,7 +238,6 @@
      * @return getter for attribute
      */
     private 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;
@@ -275,7 +270,6 @@
      * @return setter for attribute
      */
     private static String getSetter(String className, String name, String type) {
-
         return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + className + BUILDER + SPACE + SET_METHOD_PREFIX
                 + getCaptialCase(name) + OPEN_PARENTHESIS + type + SPACE + name + CLOSE_PARENTHESIS + SPACE
                 + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + THIS + PERIOD + name + SPACE + EQUAL + SPACE
@@ -304,7 +298,6 @@
      * @return setter for type def's attribute
      */
     private static String getTypeDefSetter(String type, String name) {
-
         return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE + SET_METHOD_PREFIX + getCaptialCase(name)
                 + 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
@@ -317,7 +310,6 @@
      * @return override string
      */
     public static String getOverRideString() {
-
         return NEW_LINE + FOUR_SPACE_INDENTATION + OVERRIDE + NEW_LINE;
     }
 
@@ -346,7 +338,6 @@
      * @return getter for interface
      */
     private static String getGetterInterfaceString(String returnType, String yangName) {
-
         return FOUR_SPACE_INDENTATION + returnType + SPACE + GET_METHOD_PREFIX + getCaptialCase(yangName)
                 + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN;
     }
@@ -378,7 +369,6 @@
      * @return setter string
      */
     private static String getSetterInterfaceString(String className, String attrName, String attrType) {
-
         return FOUR_SPACE_INDENTATION + className + BUILDER + SPACE + SET_METHOD_PREFIX + getCaptialCase(attrName)
                 + OPEN_PARENTHESIS + attrType + SPACE + attrName + CLOSE_PARENTHESIS + SEMI_COLAN;
     }
@@ -389,7 +379,6 @@
      * @return list string
      */
     private static String getListString() {
-
         return LIST + DIAMOND_OPEN_BRACKET;
     }
 
@@ -416,7 +405,6 @@
      * @return build method for interface
      */
     public static String getBuildForInterface(String yangName) {
-
         return FOUR_SPACE_INDENTATION + yangName + SPACE + BUILD + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SEMI_COLAN
                 + NEW_LINE;
     }
@@ -462,7 +450,6 @@
      * @return build method string for class
      */
     public static String getBuild(String yangName) {
-
         return FOUR_SPACE_INDENTATION + PUBLIC + SPACE + yangName + SPACE + BUILD + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                 + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + RETURN + SPACE + NEW + SPACE
                 + yangName + IMPL + OPEN_PARENTHESIS + THIS + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE
@@ -477,7 +464,6 @@
      * @return Default constructor for class
      */
     private static String getDefaultConstructor(String name, String modifierType) {
-
         return FOUR_SPACE_INDENTATION + modifierType + SPACE + name + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE
                 + OPEN_CURLY_BRACKET + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
     }
@@ -488,7 +474,6 @@
      * @return to string method open string
      */
     public static String getToStringMethodOpen() {
-
         return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + STRING_DATA_TYPE + SPACE + TO
                 + STRING_DATA_TYPE + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE
                 + EIGHT_SPACE_INDENTATION + RETURN + GOOGLE_MORE_OBJECT_METHOD_STRING + NEW_LINE;
@@ -500,7 +485,6 @@
      * @return to string method close string
      */
     public static String getToStringMethodClose() {
-
         return TWELVE_SPACE_INDENTATION + PERIOD + TO + STRING_DATA_TYPE + OPEN_PARENTHESIS + CLOSE_PARENTHESIS
                 + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
     }
@@ -514,10 +498,8 @@
     public static String getToStringMethod(JavaAttributeInfo attr) {
 
         String attributeName = getSmallCase(attr.getAttributeName());
-
         return TWELVE_SPACE_INDENTATION + PERIOD + ADD_STRING + OPEN_PARENTHESIS + QUOTES + attributeName + QUOTES
                 + COMMA + SPACE + attributeName + CLOSE_PARENTHESIS;
-
     }
 
     /**
@@ -526,7 +508,6 @@
      * @return hash code method open string
      */
     public static String getHashCodeMethodOpen() {
-
         return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + INT + SPACE + HASH_CODE_STRING
                 + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION
                 + RETURN + SPACE + OBJECT_STRING + SUFFIX_S + PERIOD + HASH + OPEN_PARENTHESIS;
@@ -539,7 +520,6 @@
      * @return to hash code method close string
      */
     public static String getHashCodeMethodClose(String hashcodeString) {
-
         hashcodeString = trimAtLast(hashcodeString, COMMA);
         hashcodeString = trimAtLast(hashcodeString, SPACE);
         return hashcodeString + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET
@@ -553,7 +533,6 @@
      * @return hash code method
      */
     public static String getHashCodeMethod(JavaAttributeInfo attr) {
-
         return getSmallCase(attr.getAttributeName()) + COMMA + SPACE;
     }
 
@@ -564,7 +543,6 @@
      * @return equals method open string
      */
     public static String getEqualsMethodOpen(String className) {
-
         return getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + BOOLEAN_DATA_TYPE + SPACE + EQUALS_STRING
                 + OPEN_PARENTHESIS + OBJECT_STRING + SPACE + OBJ + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET
                 + NEW_LINE + getEqualsMethodsCommonIfCondition() + getEqualsMethodsSpecificIfCondition(className);
@@ -576,7 +554,6 @@
      * @return if condition string
      */
     private static String getEqualsMethodsCommonIfCondition() {
-
         return EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + THIS + SPACE + EQUAL + EQUAL + SPACE + OBJ
                 + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION + RETURN + SPACE
                 + TRUE + SEMI_COLAN + NEW_LINE + EIGHT_SPACE_INDENTATION + CLOSE_CURLY_BRACKET + NEW_LINE;
@@ -589,7 +566,6 @@
      * @return if condition string
      */
     private static String getEqualsMethodsSpecificIfCondition(String className) {
-
         return EIGHT_SPACE_INDENTATION + IF + SPACE + OPEN_PARENTHESIS + OBJ + INSTANCE_OF + className
                 + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + TWELVE_SPACE_INDENTATION + className
                 + SPACE + OTHER + SPACE + EQUAL + SPACE + OPEN_PARENTHESIS + className + CLOSE_PARENTHESIS + SPACE
@@ -603,7 +579,6 @@
      * @return equals method close string
      */
     public static String getEqualsMethodClose(String equalMethodString) {
-
         equalMethodString = trimAtLast(equalMethodString, AND);
         equalMethodString = trimAtLast(equalMethodString, AND);
         equalMethodString = trimAtLast(equalMethodString, SPACE);
@@ -622,11 +597,9 @@
     public static String getEqualsMethod(JavaAttributeInfo attr) {
 
         String attributeName = getSmallCase(attr.getAttributeName());
-
         return SIXTEEN_SPACE_INDENTATION + SPACE + OBJECT_STRING + SUFFIX_S + PERIOD + EQUALS_STRING + OPEN_PARENTHESIS
                 + attributeName + COMMA + SPACE + OTHER + PERIOD + attributeName + CLOSE_PARENTHESIS + SPACE + AND
                 + AND;
-
     }
 
     /**
@@ -639,11 +612,57 @@
     public static String getOfMethod(String name, JavaAttributeInfo attr) {
 
         String attrQuaifiedType = 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
                 + 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;
     }
 
+    /**
+     * Returns implementation of add augmentation method of HasAugmentation class.
+     *
+     * @return implementation of add augmentation method of HasAugmentation class
+     */
+    public static String getAddAugmentInfoMethodImpl() {
+        String method = FOUR_SPACE_INDENTATION;
+        method = method + getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + VOID + SPACE + ADD_STRING
+                + AUGMENTATION + OPEN_PARENTHESIS + AUGMENTED_INFO + SPACE + VALUE + CLOSE_PARENTHESIS + SPACE
+                + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION + GET_METHOD_PREFIX + AUGMENTED_INFO + LIST
+                + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + PERIOD + ADD_STRING + OPEN_PARENTHESIS + VALUE
+                + CLOSE_PARENTHESIS + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
+
+        return method;
+    }
+
+    /**
+     * Returns implementation of get augment info list method of HasAugmentation class.
+     *
+     * @return implementation of get augment info list method of HasAugmentation class
+     */
+    public static String getAugmentInfoListImpl() {
+
+        String method = FOUR_SPACE_INDENTATION;
+        method = method + getOverRideString() + FOUR_SPACE_INDENTATION + PUBLIC + SPACE + LIST + DIAMOND_OPEN_BRACKET
+                + AUGMENTED_INFO + DIAMOND_CLOSE_BRACKET + SPACE + GET_METHOD_PREFIX + AUGMENTED_INFO + LIST
+                + OPEN_PARENTHESIS + CLOSE_PARENTHESIS + SPACE + OPEN_CURLY_BRACKET + NEW_LINE + EIGHT_SPACE_INDENTATION
+                + RETURN + SPACE + getSmallCase(AUGMENTED_INFO) + LIST + SEMI_COLAN + NEW_LINE + FOUR_SPACE_INDENTATION
+                + CLOSE_CURLY_BRACKET;
+        return method;
+    }
+
+    /**
+     * Returns implementation of remove augmentation method of HasAugmentation class.
+     *
+     * @return implementation of remove augmentation method of HasAugmentation class
+     */
+    public static String getRemoveAugmentationImpl() {
+        String method = FOUR_SPACE_INDENTATION;
+        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
+                + FOUR_SPACE_INDENTATION + CLOSE_CURLY_BRACKET;
+        return method;
+    }
+
 }
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/TempJavaCodeFragmentFilesUtils.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/TempJavaCodeFragmentFilesUtils.java
new file mode 100644
index 0000000..adc90ef
--- /dev/null
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/translator/tojava/utils/TempJavaCodeFragmentFilesUtils.java
@@ -0,0 +1,193 @@
+/*
+ * 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.utils;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.translator.tojava.HasJavaImportData;
+
+import static org.onosproject.yangutils.translator.tojava.JavaImportData.getAugmentedInfoImport;
+import static org.onosproject.yangutils.translator.tojava.JavaImportData.getHasAugmentationImport;
+import static org.onosproject.yangutils.translator.tojava.JavaImportData.getImportForArrayList;
+import static org.onosproject.yangutils.translator.tojava.JavaImportData.getImportForList;
+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;
+
+/**
+ * Represents utilities for temporary java code fragments.
+ */
+public final class TempJavaCodeFragmentFilesUtils {
+
+    /**
+     * Creates a private instance of temporary java code fragment utils.
+     */
+    private TempJavaCodeFragmentFilesUtils() {
+    }
+
+    /**
+     * Adds imports for ToString and HashCodeMethod.
+     *
+     * @param curNode current YANG node
+     * @param imports import list
+     * @return import list
+     */
+    public static List<String> addImportsToStringAndHasCodeMethods(YangNode curNode, List<String> imports) {
+        if (curNode instanceof HasJavaImportData) {
+            imports.add(((HasJavaImportData) curNode).getJavaImportData().getImportForHashAndEquals());
+            imports.add(((HasJavaImportData) curNode).getJavaImportData().getImportForToString());
+        }
+        return imports;
+    }
+
+    /**
+     * Adds import for HasAugmentation class.
+     *
+     * @param curNode current YANG node
+     * @param imports list of imports
+     * @param operation add or delete import
+     * @return import for HasAugmentation class
+     */
+    public static List<String> addHasAugmentationImport(YangNode curNode, List<String> imports, boolean operation) {
+        if (curNode instanceof HasJavaImportData) {
+            String thisImport = getHasAugmentationImport();
+            performOperationOnImports(imports, thisImport, operation);
+        }
+        return imports;
+    }
+
+    /**
+     * Adds import for AugmentedInfo class.
+     *
+     * @param curNode current YANG node
+     * @param imports list of imports
+     * @param operation add or delete import
+     * @return import for AugmentedInfo class
+     */
+    public static List<String> addAugmentedInfoImport(YangNode curNode, List<String> imports, boolean operation) {
+        if (curNode instanceof HasJavaImportData) {
+            String thisImport = getAugmentedInfoImport();
+            performOperationOnImports(imports, thisImport, operation);
+        }
+        return imports;
+    }
+
+    /**
+     * Adds import for array list.
+     *
+     * @param curNode current YANG node
+     * @param imports list of imports
+     * @param operation add or delete import
+     * @return import for HasAugmentation class
+     */
+    public static List<String> addArrayListImport(YangNode curNode, List<String> imports, boolean operation) {
+        if (curNode instanceof HasJavaImportData) {
+            String arrayListImport = getImportForArrayList();
+            String listImport = getImportForList();
+            performOperationOnImports(imports, arrayListImport, operation);
+            if (!imports.contains(listImport)) {
+                /**
+                 * List can be there because of attribute also , so no need to remove it and operation will
+                 * always be add(true).
+                 */
+                performOperationOnImports(imports, listImport, true);
+            }
+        }
+
+        return imports;
+    }
+
+    /**
+     * Performs given operations on import list.
+     *
+     * @param imports list of imports
+     * @param curImport current import
+     * @param operation add or remove
+     * @return import list
+     */
+    private static List<String> performOperationOnImports(List<String> imports, String curImport, boolean operation) {
+        if (operation) {
+            imports.add(curImport);
+        } else {
+            imports.remove(curImport);
+        }
+        java.util.Collections.sort(imports);
+        return imports;
+    }
+
+    /**
+     * Prepares java file generator for extends list.
+     *
+     * @param extendsList list of classes need to be extended
+     */
+    public static void prepareJavaFileGeneratorForExtendsList(List<String> extendsList) {
+
+        if (!extendsList.isEmpty() && !extendsList.equals(null)) {
+            JavaFileGenerator.setExtendsList(extendsList);
+            JavaFileGenerator.setIsExtendsList(true);
+        } else {
+            JavaFileGenerator.getExtendsList().clear();
+            JavaFileGenerator.setIsExtendsList(false);
+        }
+    }
+
+    /**
+     * Returns true if HasAugmentation class needs to be extended.
+     *
+     * @param extendsList list of classes need to be extended
+     * @return true or false
+     */
+    public static boolean isHasAugmentationExtended(List<String> extendsList) {
+        if (extendsList != null && extendsList.contains(HAS_AUGMENTATION)) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Returns true if AugmentedInfo class needs to be extended.
+     *
+     * @param extendsList list of classes need to be extended
+     * @return true or false
+     */
+    public static boolean isAugmentedInfoExtended(List<String> extendsList) {
+        if (extendsList != null && extendsList.contains(AUGMENTED_INFO)) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Closes the file handle for temporary file.
+     *
+     * @param file file to be closed
+     * @param toBeDeleted flag to indicate if file needs to be deleted
+     * @throws IOException when failed to close the file handle
+     */
+    public static void closeFile(File file, boolean toBeDeleted) throws IOException {
+
+        if (file != null) {
+            updateFileHandle(file, null, true);
+            if (toBeDeleted) {
+                file.delete();
+            }
+        }
+    }
+}
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 f0fb9bc..6716251 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
@@ -17,8 +17,17 @@
 package org.onosproject.yangutils.translator.tojava.utils;
 
 import java.io.IOException;
+
+import org.onosproject.yangutils.datamodel.YangAugment;
+import org.onosproject.yangutils.datamodel.YangCase;
+import org.onosproject.yangutils.datamodel.YangChoice;
+import org.onosproject.yangutils.datamodel.YangContainer;
+import org.onosproject.yangutils.datamodel.YangInput;
 import org.onosproject.yangutils.datamodel.YangLeavesHolder;
+import org.onosproject.yangutils.datamodel.YangList;
 import org.onosproject.yangutils.datamodel.YangNode;
+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;
 
@@ -26,6 +35,8 @@
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCaptialCase;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCurNodePackage;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getPackageDirPathFromJavaJPackage;
+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.YangIoUtils.getAbsolutePackagePath;
 
 /**
@@ -143,6 +154,21 @@
 
         javaCodeGeneratorInfo.getTempJavaCodeFragmentFiles()
                 .addCurNodeInfoInParentTempFile((YangNode) javaCodeGeneratorInfo, isMultiInstance);
+
+        /**
+         * For augmentation of nodes.
+         */
+        if (javaCodeGeneratorInfo instanceof YangContainer
+                || javaCodeGeneratorInfo instanceof YangCase
+                || javaCodeGeneratorInfo instanceof YangChoice
+                || javaCodeGeneratorInfo instanceof YangInput
+                || javaCodeGeneratorInfo instanceof YangList
+                || javaCodeGeneratorInfo instanceof YangNotification
+                || javaCodeGeneratorInfo instanceof YangOutput) {
+            javaCodeGeneratorInfo.getTempJavaCodeFragmentFiles().addToExtendsList(HAS_AUGMENTATION);
+        } else if (javaCodeGeneratorInfo instanceof YangAugment) {
+            javaCodeGeneratorInfo.getTempJavaCodeFragmentFiles().addToExtendsList(AUGMENTED_INFO);
+        }
     }
 
     /**