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Implement the functionality to support multiple nodes removal using list-node xpath.

REST layer (incl openapi update)

• uri:
  • (CPS) DELETE /dataspaces/{dataspaceName}/anchor/{anchorName}/list-node
  •  (NCMP) DELETE /cm-handle/{cmHandle}/list-node

REST layer (DataRestController.java)

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• Implement the method deleteListNodeElements(final String dataspaceName, final String anchorName, final String listNodeXpath)
• Call cpsDataService.deleteListNodeData()
• return 200

REST layer (cpsData.yml)

• Add patch

REST layer (DataRestControllerSpec.groovy)

• Ensure appropriate REST responses on invocation 

Service layer (CpsDataService.java)

• Create new abstract method deleteNodeTree() 

Service layer (CpsDataServiceImpl.java)

• Override abstract method deleteNodeTree()
• Validate the xpath of the list-nodes String
• call cpsDataPersistenceService.deleteListDataNodes()
• notificationService.processDataUpdatedEvent(dataspaceName, anchorName)

Service layer (CpsDataServiceImplSpec.groovy)

• delete list-node data fragment under existing node
• delete list-node data fragment under non existing node

Persistence layer (CpsDataPersistenceService.java)

• Create new abstract method deleteListDataNodes()

Persistence layer (CpsDataPersistenceServiceImpl.java)

• Override abstract method deleteListDataNodes()
• Use method getFragmentByXpath() to get the parentEntity of the List-Node
• Use parentEntity and a method parameter String listNodeXpath as arguments for method removeListNodeDescendants()

Persistence layer (CpsDataPersistenceServiceSpec.groovy)

• Delete list node content successfully
• Error thrown when listNodeXpath does not exist

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