CPS-1586 Investigate implementation for persisting of top level list nodes

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ISSUES

Description

DECISIONS

1

Adding a list element to a root list node does not
add element in parent list but in child list element
(Add list element API).

By using add list element(s) API, when added an element
to root level list node,data node is added to child node
not to parent list node.

https://lf-onap.atlassian.net/browse/CPS-1586

For top level list nodes when new elements are added to root list nodes,
first element in the root list nodes treated as parent node. so we need to
change logic to store list nodes. 

REST Layer

• DataRestController.java

  • Add a check in addListElements to see if the parent xpath is a root path ("/"). 
If root node, create passed list element as top node. Else add passed list element
to parent xpath node.

• DataRestControllerSpec.groovy

  • Add test for scenario above

Service Layer

• CpsDataService.java

  • Overload saveListElements method with implementation for no parentNodeXpath

• CpsDataServiceImpl.java

  • Overload saveListElements method with implementation for no parentNodeXpath

  • buildDataNodes and call new method storeListElements in Persistence Layer

Persistence Layer

• CpsDataPersistenceService.java

  • new method storeListElements

• CpsDataPersistenceServiceImpl.java

  • new method storeListElements, converts datanodes to fragment repository and
saves it.

Integration Tests

• CpsDataServiceIntegrationSpec.groovy

  • Add and Delete top-level list (element) data nodes with root node