YANG construct collision detection framework added
Change-Id: I1458f9e3192641f3f90c444798c31a64536ffa5d
diff --git a/src/main/java/org/onosproject/yangutils/parser/impl/parserutils/ListenerCollisionDetector.java b/src/main/java/org/onosproject/yangutils/parser/impl/parserutils/ListenerCollisionDetector.java
new file mode 100644
index 0000000..7697e6a
--- /dev/null
+++ b/src/main/java/org/onosproject/yangutils/parser/impl/parserutils/ListenerCollisionDetector.java
@@ -0,0 +1,72 @@
+/*
+ * 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.parser.impl.parserutils;
+
+import org.onosproject.yangutils.datamodel.CollisionDetector;
+import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.TreeWalkListener;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.EXIT;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER;
+import org.onosproject.yangutils.utils.YangConstructType;
+
+/**
+ * Check the YANG construct collision in a YANG file.
+ */
+public final class ListenerCollisionDetector {
+
+ /**
+ * Creates a new listener collision.
+ */
+ private ListenerCollisionDetector() {
+ }
+
+ /**
+ * Detects that the identifiers of all these child nodes must be unique
+ * within all cases in a choice.
+ *
+ * @param listener listener's object
+ * @param line line of identifier in YANG file, required for error
+ * reporting
+ * @param charPosition character position of identifier in YANG file,
+ * required for error reporting
+ * @param identifierName name for which uniqueness is to be detected
+ * @param constructType type of YANG construct for which collision check is
+ * to be performed
+ * @throws ParserException if identifier is not unique
+ */
+ public static void detectCollidingChildUtil(TreeWalkListener listener, int line, int charPosition,
+ String identifierName, YangConstructType constructType)
+ throws ParserException {
+
+ if (listener.getParsedDataStack().peek() instanceof CollisionDetector) {
+ try {
+ ((CollisionDetector) listener.getParsedDataStack().peek()).detectCollidingChild(
+ identifierName, constructType);
+ } catch (DataModelException e) {
+ ParserException parserException = new ParserException(e.getMessage());
+ parserException.setLine(line);
+ parserException.setCharPosition(charPosition);
+ throw parserException;
+ }
+ } else {
+ throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, constructType, identifierName,
+ EXIT));
+ }
+ }
+}