Fix the datanode build logic (incorrect parsing of containers and mapped lists)

Issue-ID: CPS-198
Change-Id: Ideb89f777a1bc155603152991174680fad8bb513
Signed-off-by: Ruslan Kashapov <ruslan.kashapov@pantheon.tech>

2 files changed, 37 insertions, 44 deletions

diff --git a/cps-service/src/main/java/org/onap/cps/spi/model/DataNode.java b/cps-service/src/main/java/org/onap/cps/spi/model/DataNode.java
index 721a7c0426..561389498f 100644
--- a/cps-service/src/main/java/org/onap/cps/spi/model/DataNode.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/model/DataNode.java
@@ -24,8 +24,6 @@ package org.onap.cps.spi.model;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Map;
-import java.util.Optional;
-import java.util.Set;
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.Setter;
@@ -44,5 +42,4 @@ public class DataNode {
     private Map<String, Object> leaves = Collections.emptyMap();
     private Collection<String> xpathsChildren;
     private Collection<DataNode> childDataNodes = Collections.emptySet();
-    private Optional<Set<String>> optionalLeafListNames = Optional.empty();
 }
diff --git a/cps-service/src/main/java/org/onap/cps/spi/model/DataNodeBuilder.java b/cps-service/src/main/java/org/onap/cps/spi/model/DataNodeBuilder.java
index cd6a3a2201..d187f62e0f 100644
--- a/cps-service/src/main/java/org/onap/cps/spi/model/DataNodeBuilder.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/model/DataNodeBuilder.java
@@ -23,13 +23,13 @@ import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
-import java.util.Optional;
 import java.util.Set;
+import java.util.stream.Collectors;
 import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.utils.YangUtils;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
@@ -40,24 +40,25 @@ import org.opendaylight.yangtools.yang.data.api.schema.ValueNode;
 @Slf4j
 public class DataNodeBuilder {
 
-    private NormalizedNode normalizedNodeTree;
+    private NormalizedNode<?, ?> normalizedNodeTree;
     private String xpath;
     private Collection<DataNode> childDataNodes = Collections.emptySet();
 
 
-    /** To use {@link NormalizedNode} for creating {@link DataNode}.
+    /**
+     * To use {@link NormalizedNode} for creating {@link DataNode}.
      *
      * @param normalizedNodeTree used for creating the Data Node
-     *
      * @return this {@link DataNodeBuilder} object
      */
-    public DataNodeBuilder withNormalizedNodeTree(final NormalizedNode normalizedNodeTree) {
+    public DataNodeBuilder withNormalizedNodeTree(final NormalizedNode<?, ?> normalizedNodeTree) {
         this.normalizedNodeTree = normalizedNodeTree;
         return this;
     }
 
     /**
      * To use xpath for creating {@link DataNode}.
+     *
      * @param xpath for the data node
      * @return DataNodeBuilder
      */
@@ -68,6 +69,7 @@ public class DataNodeBuilder {
 
     /**
      * To specify child nodes needs to be used while creating {@link DataNode}.
+     *
      * @param childDataNodes to be added to the dataNode
      * @return DataNodeBuilder
      */
@@ -99,71 +101,65 @@ public class DataNodeBuilder {
     }
 
     private DataNode buildFromNormalizedNodeTree() {
-        xpath = YangUtils.buildXpath(normalizedNodeTree.getIdentifier());
-        final DataNode dataNode = new DataNodeBuilder().withXpath(xpath).build();
-        addDataNodeFromNormalizedNode(dataNode, normalizedNodeTree);
-        return dataNode;
+        final DataNode formalRootDataNode = new DataNodeBuilder().withXpath("").build();
+        addDataNodeFromNormalizedNode(formalRootDataNode, normalizedNodeTree);
+        return formalRootDataNode.getChildDataNodes().iterator().next();
     }
 
-    private void addDataNodeFromNormalizedNode(final DataNode currentDataNode,
-        final NormalizedNode normalizedNode) {
+    private static void addDataNodeFromNormalizedNode(final DataNode currentDataNode,
+        final NormalizedNode<?, ?> normalizedNode) {
+
         if (normalizedNode instanceof DataContainerNode) {
-            addYangContainer(currentDataNode, (DataContainerNode) normalizedNode);
+            addYangContainer(currentDataNode, (DataContainerNode<?>) normalizedNode);
         } else if (normalizedNode instanceof MapNode) {
             addDataNodeForEachListElement(currentDataNode, (MapNode) normalizedNode);
         } else if (normalizedNode instanceof ValueNode) {
-            final ValueNode valuesNode = (ValueNode) normalizedNode;
+            final ValueNode<?, ?> valuesNode = (ValueNode<?, ?>) normalizedNode;
             addYangLeaf(currentDataNode, valuesNode.getNodeType().getLocalName(), valuesNode.getValue());
         } else if (normalizedNode instanceof LeafSetNode) {
-            addYangLeafList(currentDataNode, (LeafSetNode) normalizedNode);
+            addYangLeafList(currentDataNode, (LeafSetNode<?>) normalizedNode);
         } else {
-            log.warn("Cannot normalize {}", normalizedNode.getClass());
+            log.warn("Unsupported NormalizedNode type detected: {}", normalizedNode.getClass());
         }
     }
 
-    private void addYangContainer(final DataNode currentDataNode, final DataContainerNode dataContainerNode) {
-        final Collection<NormalizedNode> normalizedChildNodes = dataContainerNode.getValue();
-        for (final NormalizedNode normalizedNode : normalizedChildNodes) {
-            addDataNodeFromNormalizedNode(currentDataNode, normalizedNode);
+    private static void addYangContainer(final DataNode currentDataNode, final DataContainerNode<?> dataContainerNode) {
+        final DataNode dataContainerDataNode = createAndAddChildDataNode(currentDataNode,
+            YangUtils.buildXpath(dataContainerNode.getIdentifier()));
+        final Collection<DataContainerChild<?, ?>> normalizedChildNodes = dataContainerNode.getValue();
+        for (final NormalizedNode<?, ?> normalizedNode : normalizedChildNodes) {
+            addDataNodeFromNormalizedNode(dataContainerDataNode, normalizedNode);
         }
     }
 
-    private void addYangLeaf(final DataNode currentDataNode, final String leafName, final Object leafValue) {
-        final Map leaves = new ImmutableMap.Builder<String, Object>()
+    private static void addYangLeaf(final DataNode currentDataNode, final String leafName, final Object leafValue) {
+        final Map<String, Object> leaves = new ImmutableMap.Builder<String, Object>()
             .putAll(currentDataNode.getLeaves())
             .put(leafName, leafValue)
             .build();
         currentDataNode.setLeaves(leaves);
     }
 
-    private void addYangLeafList(final DataNode currentDataNode, final LeafSetNode leafSetNode) {
-        final ImmutableSet.Builder builder = new ImmutableSet.Builder<String>();
+    private static void addYangLeafList(final DataNode currentDataNode, final LeafSetNode<?> leafSetNode) {
         final String leafListName = leafSetNode.getNodeType().getLocalName();
-        final Optional<Set<String>> optionalLeafListNames = currentDataNode.getOptionalLeafListNames();
-        if (optionalLeafListNames.isPresent()) {
-            builder.addAll(optionalLeafListNames.get());
-        }
-        builder.add(leafListName);
-        final ImmutableSet leafListNames = builder.build();
-        currentDataNode.setOptionalLeafListNames(Optional.of(leafListNames));
-        final List leafListValues = new LinkedList();
-        for (final NormalizedNode normalizedNode : (Collection<NormalizedNode>) leafSetNode.getValue()) {
-            leafListValues.add(((ValueNode) normalizedNode).getValue());
-        }
+        final List<?> leafListValues = ((Collection<? extends NormalizedNode<?, ?>>) leafSetNode.getValue())
+            .stream()
+            .map(normalizedNode -> ((ValueNode<?, ?>) normalizedNode).getValue())
+            .collect(Collectors.toUnmodifiableList());
         addYangLeaf(currentDataNode, leafListName, leafListValues);
     }
 
-    private void addDataNodeForEachListElement(final DataNode currentDataNode, final MapNode mapNode) {
+    private static void addDataNodeForEachListElement(final DataNode currentDataNode, final MapNode mapNode) {
         final Collection<MapEntryNode> mapEntryNodes = mapNode.getValue();
         for (final MapEntryNode mapEntryNode : mapEntryNodes) {
-            final String xpathChild = YangUtils.buildXpath(mapEntryNode.getIdentifier());
-            final DataNode childDataNode = createAndAddChildDataNode(currentDataNode, xpathChild);
-            addDataNodeFromNormalizedNode(childDataNode, mapEntryNode);
+            addDataNodeFromNormalizedNode(currentDataNode, mapEntryNode);
         }
     }
 
-    private DataNode createAndAddChildDataNode(final DataNode parentDataNode, final String childXpath) {
-        final DataNode newChildDataNode = new DataNodeBuilder().withXpath(xpath + childXpath)
+    private static DataNode createAndAddChildDataNode(final DataNode parentDataNode, final String childXpath) {
+
+        final DataNode newChildDataNode = new DataNodeBuilder()
+            .withXpath(parentDataNode.getXpath() + childXpath)
             .build();
         final Set<DataNode> allChildDataNodes = new ImmutableSet.Builder<DataNode>()
             .addAll(parentDataNode.getChildDataNodes())