[ONOS-3884] Common interface for parser and translator

Change-Id: I0e556f4324375132787a6b1abefccdd1414abf50
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/datamodel/YangNameSpace.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/datamodel/YangNameSpace.java
new file mode 100644
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@@ -0,0 +1,91 @@
+/*
+ * 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.datamodel;
+
+import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.parser.Parsable;
+import org.onosproject.yangutils.parser.ParsableDataType;
+
+/*
+ *  Reference:RFC 6020.
+ *  The "namespace" statement defines the XML namespace that all
+ *  identifiers defined by the module are qualified by, with the
+ *  exception of data node identifiers defined inside a grouping.
+ *  The argument to the "namespace" statement is the URI of the
+ *  namespace.
+ */
+
+/**
+ * Name space to be used for the XML data tree.
+ */
+public class YangNameSpace implements Parsable {
+
+    private String uri;
+
+    /**
+     * Default constructor.
+     */
+    public YangNameSpace() {
+    }
+
+    /**
+     * Get the name space URI.
+     *
+     * @return the URI.
+     */
+    public String getUri() {
+        return uri;
+    }
+
+    /**
+     * Set the name space URI.
+     *
+     * @param uri the URI to set
+     */
+    public void setUri(String uri) {
+        this.uri = uri;
+    }
+
+    /**
+     * Returns the type of the parsed data.
+     *
+     * @return returns NAMESPACE_DATA.
+     */
+    public ParsableDataType getParsableDataType() {
+        return ParsableDataType.NAMESPACE_DATA;
+    }
+
+    /**
+     * Validate the data on entering the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules.
+     */
+    public void validateDataOnEntry() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+
+    /**
+     * Validate the data on exiting the corresponding parse tree node.
+     *
+     * @throws DataModelException a violation of data model rules.
+     */
+    public void validateDataOnExit() throws DataModelException {
+        // TODO auto-generated method stub, to be implemented by parser
+
+    }
+}