YANG string restriction listener + YANG Range restriction listener review comment fix

Change-Id: I9e7af9c67f8fbf918d4e0d8ff147a560889ff264
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/builtindatatype/BuiltInTypeObjectFactory.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/builtindatatype/BuiltInTypeObjectFactory.java
new file mode 100644
index 0000000..7002129
--- /dev/null
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/builtindatatype/BuiltInTypeObjectFactory.java
@@ -0,0 +1,75 @@
+/*-
+ * 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.utils.builtindatatype;
+
+import org.onosproject.yangutils.datamodel.YangDataTypes;
+
+/**
+ * Factory to create an object of required type.
+ */
+public final class BuiltInTypeObjectFactory {
+
+    /**
+     * Utility factory class, hence the object creation is forbidden.
+     */
+    private BuiltInTypeObjectFactory() {
+    }
+
+    /**
+     * Given the value represented in string return the corresponding types
+     * object with the value initialized.
+     *
+     * @param valueInStr value represented in string
+     * @param builtInType built in data type
+     * @return the target data type object with the value initialized
+     * @param <T> the data type of the target object
+     */
+    public static <T extends YangBuiltInDataTypeInfo<?>> T getDataObjectFromString(String valueInStr,
+            YangDataTypes builtInType) {
+
+        switch (builtInType) {
+            case INT8: {
+                return (T) new YangInt8(valueInStr);
+            }
+            case INT16: {
+                return (T) new YangInt16(valueInStr);
+            }
+            case INT32: {
+                return (T) new YangInt32(valueInStr);
+            }
+            case INT64: {
+                return (T) new YangInt64(valueInStr);
+            }
+            case UINT8: {
+                return (T) new YangUint8(valueInStr);
+            }
+            case UINT16: {
+                return (T) new YangUint16(valueInStr);
+            }
+            case UINT32: {
+                return (T) new YangUint32(valueInStr);
+            }
+            case UINT64: {
+                return (T) new YangUint64(valueInStr);
+            }
+            default: {
+                throw new DataTypeException("YANG file error : Unsupported data type");
+            }
+        }
+
+    }
+
+}