Appending dummy root node to XML data format

To hold all the children in XML message a dummy root node is added

Issue-ID: CCSDK-324

Change-Id: I7cf0266d15e6bfaa2b9207e77d8bd5372a164b4f
Signed-off-by: janani b <janani.b@huawei.com>

3 files changed, 24 insertions, 13 deletions

diff --git a/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/DfSerializerUtil.java b/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/DfSerializerUtil.java
index 598b08c1..fbebd2b2 100644
--- a/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/DfSerializerUtil.java
+++ b/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/DfSerializerUtil.java
@@ -210,11 +210,10 @@ public final class DfSerializerUtil {
      * @return base type definition
      */
     static TypeDefinition<?> resolveBaseTypeFrom(TypeDefinition<?> type) {
-        TypeDefinition superType;
-        for(superType = type; superType.getBaseType() != null;
-            superType = superType.getBaseType()) {
+        TypeDefinition superType = type;
+        while (superType.getBaseType() != null) {
+            superType = superType.getBaseType();
         }
         return superType;
     }
-
 }
diff --git a/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/PropertiesNodeXmlListener.java b/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/PropertiesNodeXmlListener.java
index 39a08e38..f098195e 100644
--- a/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/PropertiesNodeXmlListener.java
+++ b/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/PropertiesNodeXmlListener.java
@@ -78,11 +78,13 @@ public class PropertiesNodeXmlListener implements PropertiesNodeListener {
 
     @Override
     public void start(PropertiesNode node) {
-        //Do Nothing.
+        rootElement = addElement(null, node);
+        elementStack.push(rootElement);
     }
 
     @Override
     public void end(PropertiesNode node) throws SvcLogicException {
+        xmlData = rootElement.asXML();
         xmlData = UTF_HEADER + xmlData;
         writer = getXmlWriter(xmlData, "4");
     }
@@ -113,9 +115,6 @@ public class PropertiesNodeXmlListener implements PropertiesNodeListener {
                         NODE_TYPE_ERR, node.nodeType().toString()));
         }
         if (element != null) {
-            if (elementStack.isEmpty()) {
-                rootElement = element;
-            }
             elementStack.push(element);
         }
     }
@@ -133,10 +132,7 @@ public class PropertiesNodeXmlListener implements PropertiesNodeListener {
             case MULTI_INSTANCE_NODE:
             case MULTI_INSTANCE_LEAF_NODE:
             case SINGLE_INSTANCE_LEAF_NODE:
-                if (!elementStack.isEmpty() &&
-                        elementStack.peek().equals(rootElement)) {
-                    xmlData = rootElement.asXML();
-                } else {
+                if (!elementStack.isEmpty()) {
                     elementStack.pop();
                 }
                 break;
diff --git a/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/XmlSerializer.java b/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/XmlSerializer.java
index 6eeb4b82..f3c6723e 100644
--- a/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/XmlSerializer.java
+++ b/restconf-client/provider/src/main/java/org/onap/ccsdk/sli/plugins/yangserializers/dfserializer/XmlSerializer.java
@@ -61,7 +61,7 @@ public class XmlSerializer extends DataFormatSerializer {
         PropertiesNodeXmlListener xmlListener = new PropertiesNodeXmlListener();
         nodeWalker.walk(xmlListener, propNode);
         Writer writer = xmlListener.getWriter();
-        return writer.toString();
+        return removeRootNode(writer.toString(), propNode.name());
     }
 
     @Override
@@ -85,4 +85,20 @@ public class XmlSerializer extends DataFormatSerializer {
         return serializerContext().getPropNodeSerializer().decode(
                 listener.serializerHelper().getPropertiesNode());
     }
+
+    /**
+     * Removes root node from the XML data format message and makes the
+     * string to be pretty print.
+     *
+     * @param xml      XML data format message
+     * @param rootName root node name
+     * @return pretty print format XML message
+     */
+    private static String removeRootNode(String xml, String rootName) {
+        xml = xml.replace("\n<" + rootName + ">", "\n");
+        xml = xml.replace("</" + rootName + ">" + "\n", "");
+        xml = xml.replaceAll("\n" + "    ", "\n");
+        xml = xml.replaceFirst("\n", "");
+        return xml;
+    }
 }
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