Fetching data node by xpath - rest and service layers

IssueID: CPS-71
Change-Id: I54801fc12a8aa700d85e774780c9990b7f19c747
Signed-off-by: Ruslan Kashapov <ruslan.kashapov@pantheon.tech>

2 files changed, 19 insertions, 6 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 9b31df5637..4f23a8a260 100644
--- 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
@@ -1,6 +1,7 @@
 /*
- * ============LICENSE_START=======================================================
+ *  ============LICENSE_START=======================================================
  *  Copyright (C) 2020 Bell Canada. All rights reserved.
+ *  Modifications Copyright (C) 2021 Pantheon.tech
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -23,6 +24,9 @@ import javax.validation.Valid;
 import javax.validation.constraints.NotNull;
 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.utils.DataMapUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -44,13 +48,21 @@ public class DataRestController implements CpsDataApi {
     }
 
     @Override
-    public ResponseEntity<Object> getNode(final String dataspaceName) {
+    public ResponseEntity<Object> getNodeByDataspace(final String dataspaceName) {
         return null;
     }
 
     @Override
-    public ResponseEntity<Object> getNodeByDataspaceAndAnchor(final String dataspaceName, final String anchorName) {
-        return null;
+    public ResponseEntity<Object> getNodeByDataspaceAndAnchor(final String dataspaceName, final String anchorName,
+        final String cpsPath, final Boolean includeDescendants) {
+        if ("/".equals(cpsPath)) {
+            // TODO: extracting data by anchor only (root data node and below)
+            return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+        }
+        final FetchDescendantsOption fetchDescendantsOption = Boolean.TRUE.equals(includeDescendants)
+            ? FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS : FetchDescendantsOption.OMIT_DESCENDANTS;
+        final DataNode dataNode =
+            cpsDataService.getDataNode(dataspaceName, anchorName, cpsPath, fetchDescendantsOption);
+        return new ResponseEntity<>(DataMapUtils.toDataMap(dataNode), HttpStatus.OK);
     }
-
 }
diff --git a/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java b/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java
index 2f636630c4..2599dc4f01 100644
--- a/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java
+++ b/cps-rest/src/main/java/org/onap/cps/rest/exceptions/CpsRestExceptionHandler.java
@@ -27,6 +27,7 @@ import org.onap.cps.rest.model.ErrorMessage;
 import org.onap.cps.spi.exceptions.CpsAdminException;
 import org.onap.cps.spi.exceptions.CpsException;
 import org.onap.cps.spi.exceptions.DataInUseException;
+import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
 import org.onap.cps.spi.exceptions.DataValidationException;
 import org.onap.cps.spi.exceptions.ModelValidationException;
 import org.onap.cps.spi.exceptions.NotFoundInDataspaceException;
@@ -58,7 +59,7 @@ public class CpsRestExceptionHandler {
         return buildErrorResponse(HttpStatus.BAD_REQUEST, exception.getMessage(), extractDetails(exception));
     }
 
-    @ExceptionHandler({NotFoundInDataspaceException.class})
+    @ExceptionHandler({NotFoundInDataspaceException.class, DataNodeNotFoundException.class})
     public static ResponseEntity<Object> handleNotFoundExceptions(final CpsException exception) {
         return buildErrorResponse(HttpStatus.NOT_FOUND, exception.getMessage(), extractDetails(exception));
     }