[ONOS-3906],[ONOS-3910] Implementation of YANG module and leaf/leaf-list translator.

Change-Id: If1a8a991ffafa14b51211f97c435176ee1bf856f
diff --git a/src/main/java/org/onosproject/yangutils/translator/tojava/JavaCodeGenerator.java b/src/main/java/org/onosproject/yangutils/translator/tojava/JavaCodeGenerator.java
new file mode 100644
index 0000000..000ab8b
--- /dev/null
+++ b/src/main/java/org/onosproject/yangutils/translator/tojava/JavaCodeGenerator.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2016 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;
+
+import java.io.IOException;
+
+import org.onosproject.yangutils.datamodel.YangNode;
+
+/**
+ * Implementation of Java code generator based on application schema.
+ */
+public final class JavaCodeGenerator {
+
+    /**
+     * Default constructor.
+     */
+    private JavaCodeGenerator() {
+    }
+
+    /**
+     * Generate Java code files corresponding to the YANG schema.
+     *
+     * @param rootNode root node of the data model tree.
+     * @throws IOException when fails to generate java code file the current node.
+     */
+    public static void generateJavaCode(YangNode rootNode) throws IOException {
+        YangNode curNode = rootNode;
+        TraversalType curTraversal = TraversalType.ROOT;
+
+        while (!(curNode == null)) {
+            if (curTraversal != TraversalType.PARENT) {
+                curNode.generateJavaCodeEntry();
+            }
+            if (curTraversal != TraversalType.PARENT && !(curNode.getChild() == null)) {
+                curTraversal = TraversalType.CHILD;
+                curNode = curNode.getChild();
+            } else if (!(curNode.getNextSibling() == null)) {
+                curTraversal = TraversalType.SIBILING;
+                curNode = curNode.getNextSibling();
+            } else {
+                curTraversal = TraversalType.PARENT;
+                curNode.generateJavaCodeExit();
+                curNode = curNode.getParent();
+            }
+        }
+    }
+}