CPS-1401 Implement V2 of GET Data Node API

- Modified the GET Data Node API so it returns all the data nodes when
  xpath set to root "/"
- Fragment Repository now returns a collection of Fragment Entities
- Instead of returning only the first Fragment Entity now all fragment
  entities are returned when xpath is set to root
- The Fragemnt Entities are further processed to a Collection of Data
  Nodes. As opposed to singular Data Node in current implementation.
- Finally the DataRestController also returns a Collection of Data
  Nodes when xpath is set to root and valid data is present
- Response body changed from JSON object to JSON Array.
- Exception handling for invalid xpath and non-existing xpath is now
  done separately at persistence layer.
- Refactored code against CPS-1422
- Deprecated getDataNode method from Service and Persistence layer
- Modified V1 of Get Data Node API to use the getDataNodes method and
  get the first data node from the collection returned.
- Modified NCMP to use getDataNodes method
- NCMP still does not support multiple data nodes. It retrieves the
  first data node from the collection returned by getDataNodes

Signed-off-by: arpitsingh <as00745003@techmahindra.com>
Change-Id: I494a5740a53f65376d135fcb9f1e2e8900a2803e

1 files changed, 3 insertions, 2 deletions

diff --git a/integration-test/src/test/groovy/org/onap/cps/integration/CpsPersistenceSpec.groovy b/integration-test/src/test/groovy/org/onap/cps/integration/CpsPersistenceSpec.groovy
index 94bcb0a6fe..349f0854ef 100644
--- a/integration-test/src/test/groovy/org/onap/cps/integration/CpsPersistenceSpec.groovy
+++ b/integration-test/src/test/groovy/org/onap/cps/integration/CpsPersistenceSpec.groovy
@@ -1,6 +1,7 @@
 /*
  *  ============LICENSE_START=======================================================
  *  Copyright (C) 2023 Nordix Foundation
+ *  Modifications Copyright (C) 2023 TechMahindra Ltd.
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the 'License');
  *  you may not use this file except in compliance with the License.
@@ -36,7 +37,7 @@ class CpsPersistenceSpec extends CpsIntegrationSpecBase{
         and: 'The anchor has been persisted successfully'
             cpsAdminService.getAnchor(TEST_DATASPACE, TEST_ANCHOR).getName() == TEST_ANCHOR
         and: 'The data nodes have been persisted successfully'
-            cpsDataService.getDataNode(TEST_DATASPACE, TEST_ANCHOR, '/bookstore', FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS).xpath == '/bookstore'
+            cpsDataService.getDataNodes(TEST_DATASPACE, TEST_ANCHOR, '/bookstore', FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS).iterator().next().xpath == '/bookstore'
     }
 
     def 'Test deletion of all test data'() {
@@ -56,6 +57,6 @@ class CpsPersistenceSpec extends CpsIntegrationSpecBase{
         when: 'data is persisted to the database'
             saveDataNodes(TEST_DATASPACE, TEST_ANCHOR, "/", "BookstoreDataNodes.json")
         then: 'the correct data is saved'
-            cpsDataService.getDataNode(TEST_DATASPACE, TEST_ANCHOR, '/bookstore', FetchDescendantsOption.OMIT_DESCENDANTS).leaves['bookstore-name'] == 'Easons'
+            cpsDataService.getDataNodes(TEST_DATASPACE, TEST_ANCHOR, '/bookstore', FetchDescendantsOption.OMIT_DESCENDANTS).iterator().next().leaves['bookstore-name'] == 'Easons'
     }
 }