Implement getDataNode(anchorName, xPath) in NF-Proxy

Added spring-boot-starter-validation instead of cps-ri.
Added test 'Data node without leaves and without children.' to MultipartFileUtilSpec groovy test
Created a method getNodeByCmHandleIdAndXpath(cmHandleId, cpsPath)
Added hardcoded value of NFS DataspaceName as: "NFP-Operation".
Issue-ID: CPS-172

Signed-off-by: Hanif Kukkalli <lte-ng@outlook.com>
Change-Id: Ie8086ede01a9c5069b1ee75864b04a0ee5e8a4f6

2 files changed, 87 insertions, 0 deletions

diff --git a/cps-nf-proxy-service/src/main/java/org/onap/cps/nfproxy/api/NfProxyDataService.java b/cps-nf-proxy-service/src/main/java/org/onap/cps/nfproxy/api/NfProxyDataService.java
new file mode 100644
index 0000000000..644dfab117
--- /dev/null
+++ b/cps-nf-proxy-service/src/main/java/org/onap/cps/nfproxy/api/NfProxyDataService.java
@@ -0,0 +1,44 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 highstreet technologies GmbH
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.nfproxy.api;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.onap.cps.spi.FetchDescendantsOption;
+import org.onap.cps.spi.model.DataNode;
+
+/*
+ * Datastore interface for handling CPS data.
+ */
+public interface NfProxyDataService {
+
+    /**
+     * Retrieves datanode by XPath for a given cm handle.
+     *
+     * @param cmHandle               The identifier for a network function, network element, subnetwork or any other
+     *                               cm object by managed NF-Proxy
+     * @param xpath                  xpath
+     * @param fetchDescendantsOption defines the scope of data to fetch: either single node or all the descendant nodes
+     *                               (recursively) as well
+     * @return data node object
+     */
+    DataNode getDataNode(@NonNull String cmHandle, @NonNull String xpath,
+                         @NonNull FetchDescendantsOption fetchDescendantsOption);
+
+}
diff --git a/cps-nf-proxy-service/src/main/java/org/onap/cps/nfproxy/api/impl/NfProxyDataServiceImpl.java b/cps-nf-proxy-service/src/main/java/org/onap/cps/nfproxy/api/impl/NfProxyDataServiceImpl.java
new file mode 100755
index 0000000000..d30702e773
--- /dev/null
+++ b/cps-nf-proxy-service/src/main/java/org/onap/cps/nfproxy/api/impl/NfProxyDataServiceImpl.java
@@ -0,0 +1,43 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 highstreet technologies GmbH
+ *  ================================================================================
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.nfproxy.api.impl;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.onap.cps.api.CpsDataService;
+import org.onap.cps.nfproxy.api.NfProxyDataService;
+import org.onap.cps.spi.FetchDescendantsOption;
+import org.onap.cps.spi.model.DataNode;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class NfProxyDataServiceImpl implements NfProxyDataService {
+
+    private static final String NF_PROXY_DATASPACE_NAME = "NFP-Operational";
+
+    @Autowired
+    private CpsDataService cpsDataService;
+
+    @Override
+    public DataNode getDataNode(@NonNull final String cmHandle, @NonNull final String xpath,
+                                @NonNull final FetchDescendantsOption fetchDescendantsOption) {
+        return cpsDataService.getDataNode(NF_PROXY_DATASPACE_NAME, cmHandle, xpath, fetchDescendantsOption);
+    }
+}