Replace list-node content (part 1): CPS Service and persistence layers

Issue-ID: CPS-362
Change-Id: I669c9fc6ef67c1992fe95e17a765f0c616b00f7e
Signed-off-by: Ruslan Kashapov <ruslan.kashapov@pantheon.tech>

3 files changed, 39 insertions, 4 deletions

diff --git a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
index 8e59ebcbb0..3b50c51445 100644
--- a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
+++ b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
@@ -105,4 +105,18 @@ public interface CpsDataService {
      */
     void replaceNodeTree(@NonNull String dataspaceName, @NonNull String anchorName, @NonNull String parentNodeXpath,
         @NonNull String jsonData);
+
+    /**
+     * Replaces (if exists) child data fragment representing list-node (with one or more elements)
+     * under existing data node for the given anchor and dataspace.
+     *
+     * @param dataspaceName   dataspace name
+     * @param anchorName      anchor name
+     * @param parentNodeXpath parent node xpath
+     * @param jsonData        json data representing list element
+     * @throws DataValidationException   when json data is invalid (incl. list-node being empty)
+     * @throws DataNodeNotFoundException when parent node cannot be found by parent node xpath
+     */
+    void replaceListNodeData(@NonNull String dataspaceName, @NonNull String anchorName, @NonNull String parentNodeXpath,
+        @NonNull String jsonData);
 }
diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
index 523657a7fc..23bf4f2ee9 100755
--- a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
@@ -71,9 +71,6 @@ public class CpsDataServiceImpl implements CpsDataService {
         final String parentNodeXpath, final String jsonData) {
         final Collection<DataNode> dataNodesCollection =
             buildDataNodeCollectionFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
-        if (dataNodesCollection.isEmpty()) {
-            throw new DataValidationException("Invalid list data.", "List node is empty.");
-        }
         cpsDataPersistenceService.addListDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodesCollection);
     }
 
@@ -98,6 +95,14 @@ public class CpsDataServiceImpl implements CpsDataService {
         cpsDataPersistenceService.replaceDataNodeTree(dataspaceName, anchorName, dataNode);
     }
 
+    @Override
+    public void replaceListNodeData(final String dataspaceName, final String anchorName, final String parentNodeXpath,
+        final String jsonData) {
+        final Collection<DataNode> dataNodes =
+            buildDataNodeCollectionFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
+        cpsDataPersistenceService.replaceListDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodes);
+    }
+
     private DataNode buildDataNodeFromJson(final String dataspaceName, final String anchorName,
         final String parentNodeXpath, final String jsonData) {
 
@@ -123,10 +128,15 @@ public class CpsDataServiceImpl implements CpsDataService {
         final var schemaContext = getSchemaContext(dataspaceName, anchor.getSchemaSetName());
 
         final NormalizedNode<?, ?> normalizedNode = YangUtils.parseJsonData(jsonData, schemaContext, parentNodeXpath);
-        return new DataNodeBuilder()
+        final Collection<DataNode> dataNodes = new DataNodeBuilder()
             .withParentNodeXpath(parentNodeXpath)
             .withNormalizedNodeTree(normalizedNode)
             .buildCollection();
+        if (dataNodes.isEmpty()) {
+            throw new DataValidationException("Invalid list data.", "List node is empty.");
+        }
+        return dataNodes;
+
     }
 
     private SchemaContext getSchemaContext(final String dataspaceName, final String schemaSetName) {
diff --git a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
index 0ed3bf0051..3b16b0d813 100644
--- a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
@@ -101,6 +101,17 @@ public interface CpsDataPersistenceService {
     void replaceDataNodeTree(@NonNull String dataspaceName, @NonNull String anchorName, @NonNull DataNode dataNode);
 
     /**
+     * Replaces existing list data node content including descendants.
+     *
+     * @param dataspaceName   dataspace name
+     * @param anchorName      anchor name
+     * @param parentNodeXpath parent node xpath
+     * @param dataNodes       collection of data nodes representing list node elements
+     */
+    void replaceListDataNodes(@NonNull String dataspaceName, @NonNull String anchorName,
+        @NonNull String parentNodeXpath, @NonNull Collection<DataNode> dataNodes);
+
+    /**
      * Get a datanode by cps path.
      *
      * @param dataspaceName          dataspace name