YANG construct collision detection framework added

Change-Id: I1458f9e3192641f3f90c444798c31a64536ffa5d
diff --git a/src/main/java/org/onosproject/yangutils/parser/impl/listeners/MaxElementsListener.java b/src/main/java/org/onosproject/yangutils/parser/impl/listeners/MaxElementsListener.java
index bf59311..72ba44d 100644
--- a/src/main/java/org/onosproject/yangutils/parser/impl/listeners/MaxElementsListener.java
+++ b/src/main/java/org/onosproject/yangutils/parser/impl/listeners/MaxElementsListener.java
@@ -23,7 +23,7 @@
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.TreeWalkListener;
 
-import static org.onosproject.yangutils.parser.ParsableDataType.MAX_ELEMENT_DATA;
+import static org.onosproject.yangutils.utils.YangConstructType.MAX_ELEMENT_DATA;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER;
@@ -60,8 +60,8 @@
      * rule (max-elements), performs validation and updates the data model
      * tree.
      *
-     * @param listener listener's object.
-     * @param ctx context object of the grammar rule.
+     * @param listener listener's object
+     * @param ctx context object of the grammar rule
      */
     public static void processMaxElementsEntry(TreeWalkListener listener,
                                              GeneratedYangParser.MaxElementsStatementContext ctx) {
@@ -77,7 +77,7 @@
         }
 
         Parsable tmpData = listener.getParsedDataStack().peek();
-        switch (tmpData.getParsableDataType()) {
+        switch (tmpData.getYangConstructType()) {
             case LEAF_LIST_DATA:
                 YangLeafList leafList = (YangLeafList) tmpData;
                 leafList.setMaxElelements(maxElementsValue);