CPS Delta API 1: Delta between 2 anchors

- CPS Delta Feature Part 1: To find delta between two anchors
   - created new endpoint deltaByDataspaceAndAnchors
   - endpoint to take dataspaceName, source anchor, target anchor,
     xpath, descendants as input
   - added new service CpsDeltaService
   - added method to find delta between DataNodes:
     getDeltaReport
   - added method to find removed data nodes: getRemovedDeltaReports
   - added method to get Added DataNodes: getAddedDeltaReports
   - added method to get Map of xpath to DataNode: convertToXPathToDataNodesMap
   - added a POJO for delta report
   - Added new JSON data for delta feature testing
   - Added groovy test files CpsDeltaServiceImplSpec and DeltaReportBuilderSpec
   - code related to update operation, will be added in
     separate commit

Issue-ID: CPS-1824
Signed-off-by: Arpit Singh <as00745003@techmahindra.com>
Change-Id: I313f0f71d04b03878be7643f709d8af1aa6df6ba

1 files changed, 18 insertions, 0 deletions

diff --git a/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java b/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
index 60e7fb6d2d..4f9328b6cd 100755
--- a/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
+++ b/cps-rest/src/main/java/org/onap/cps/rest/controller/DataRestController.java
@@ -38,6 +38,7 @@ import org.onap.cps.api.CpsDataService;
 import org.onap.cps.rest.api.CpsDataApi;
 import org.onap.cps.spi.FetchDescendantsOption;
 import org.onap.cps.spi.model.DataNode;
+import org.onap.cps.spi.model.DeltaReport;
 import org.onap.cps.utils.ContentType;
 import org.onap.cps.utils.DataMapUtils;
 import org.onap.cps.utils.JsonObjectMapper;
@@ -166,6 +167,23 @@ public class DataRestController implements CpsDataApi {
         return new ResponseEntity<>(HttpStatus.NO_CONTENT);
     }
 
+    @Override
+    @Timed(value = "cps.data.controller.get.delta",
+            description = "Time taken to get delta between anchors")
+    public ResponseEntity<Object> getDeltaByDataspaceAndAnchors(final String dataspaceName,
+                                                                           final String sourceAnchorName,
+                                                                           final String targetAnchorName,
+                                                                           final String xpath,
+                                                                           final String descendants) {
+        final FetchDescendantsOption fetchDescendantsOption =
+                FetchDescendantsOption.getFetchDescendantsOption(descendants);
+
+        final List<DeltaReport> deltaBetweenAnchors =
+                cpsDataService.getDeltaByDataspaceAndAnchors(dataspaceName, sourceAnchorName,
+                targetAnchorName, xpath, fetchDescendantsOption);
+        return new ResponseEntity<>(jsonObjectMapper.asJsonString(deltaBetweenAnchors), HttpStatus.OK);
+    }
+
     private static boolean isRootXpath(final String xpath) {
         return ROOT_XPATH.equals(xpath);
     }