[ONOS-5088] YANG SBI Broker Implementation.
Change-Id: Ibe87e095a4c209c54e3e90aceca0ec9097c5ede0
diff --git a/apps/yms/app/src/main/java/org/onosproject/yms/app/ych/defaultcodecs/xml/XmlCodecYdtListener.java b/apps/yms/app/src/main/java/org/onosproject/yms/app/ych/defaultcodecs/xml/XmlCodecYdtListener.java
new file mode 100644
index 0000000..98a8ccb
--- /dev/null
+++ b/apps/yms/app/src/main/java/org/onosproject/yms/app/ych/defaultcodecs/xml/XmlCodecYdtListener.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2016-present 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.yms.app.ych.defaultcodecs.xml;
+
+import org.dom4j.Element;
+import org.onosproject.yms.app.ych.defaultcodecs.CodecHandlerFactory;
+import org.onosproject.yms.app.ydt.YdtExtendedContext;
+import org.onosproject.yms.app.ydt.YdtExtendedListener;
+import org.onosproject.yms.ych.YangProtocolEncodingFormat;
+import org.onosproject.yms.ydt.YdtContext;
+
+import java.util.Objects;
+import java.util.Stack;
+
+import static org.onosproject.yms.ych.YangProtocolEncodingFormat.XML;
+
+/**
+ * Represents implementation of codec YANG data object listener.
+ */
+class XmlCodecYdtListener implements YdtExtendedListener {
+
+ /**
+ * Data format type requested from driver.
+ */
+ private YangProtocolEncodingFormat dataFormat;
+
+ /**
+ * Stack for element is maintained for hierarchical references, this is
+ * used during YDT walker and preparation of xml/json.
+ */
+ private final Stack<Element> elementStack = new Stack<>();
+
+ /**
+ * Root name received from driver.
+ */
+ private YdtExtendedContext rootYdtNode;
+
+ /**
+ * Creates a new codec listener.
+ *
+ * @param format protocol data format
+ * @param rootNode extended YDT root node
+ */
+ XmlCodecYdtListener(YangProtocolEncodingFormat format,
+ YdtExtendedContext rootNode) {
+ dataFormat = format;
+ rootYdtNode = rootNode;
+ }
+
+ /**
+ * Returns the stack for the element.
+ *
+ * @return the stack for the element
+ */
+ Stack<Element> getElementStack() {
+ return elementStack;
+ }
+
+ @Override
+ public void enterYdtNode(YdtExtendedContext ydtContext) {
+
+ if (!Objects.equals(rootYdtNode, ydtContext)) {
+
+ CodecHandlerFactory factory = CodecHandlerFactory.instance();
+ XmlCodecHandler handler =
+ factory.getCodecHandlerForContext(ydtContext, dataFormat);
+ try {
+ if (dataFormat == XML && handler != null) {
+ handler.processXmlContext(ydtContext, elementStack);
+ }
+ } catch (Exception e) {
+ // TODO
+ }
+
+ if (dataFormat == XML && handler != null) {
+ handler.setXmlValue(ydtContext, elementStack);
+ }
+ }
+ }
+
+ @Override
+ public void exitYdtNode(YdtExtendedContext ydtExtendedContext) {
+ if (!Objects.equals(rootYdtNode, ydtExtendedContext)) {
+ elementStack.pop();
+ }
+ }
+
+ @Override
+ public void enterYdtNode(YdtContext ydtContext) {
+ }
+
+ @Override
+ public void exitYdtNode(YdtContext ydtContext) {
+ }
+
+}