Allow separate registration of DMIDataPlugin and DmiModelPugin

[cps.git] / cps-ncmp-service / src / main / java / org / onap / cps / ncmp / api / impl / operations / PersistenceCmHandleRetriever.java

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/PersistenceCmHandleRetriever.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/PersistenceCmHandleRetriever.java
new file mode 100644 (file)
index 0000000..78b5c31
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/operations/PersistenceCmHandleRetriever.java
@@ -0,0 +1,89 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation
+ *  ================================================================================
+ *  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.ncmp.api.impl.operations;
+
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.onap.cps.api.CpsDataService;
+import org.onap.cps.ncmp.api.models.CmHandle;
+import org.onap.cps.ncmp.api.models.PersistenceCmHandle;
+import org.onap.cps.spi.FetchDescendantsOption;
+import org.onap.cps.spi.model.DataNode;
+import org.springframework.stereotype.Component;
+
+/**
+ * Retrieves PersistenceCmHandles & properties.
+ */
+@Component
+public class PersistenceCmHandleRetriever {
+
+    private static final String NCMP_DATASPACE_NAME = "NCMP-Admin";
+    private static final String NCMP_DMI_REGISTRY_ANCHOR = "ncmp-dmi-registry";
+
+    private CpsDataService cpsDataService;
+
+    /**
+     * Constructor for PersistenceCmHandleRetriever.
+     * 
+     * @param cpsDataService the cps data service.
+     */
+    public PersistenceCmHandleRetriever(final CpsDataService cpsDataService) {
+        this.cpsDataService = cpsDataService;
+    }
+
+    /**
+     * This method retieves dmi service name and properties for a given cm handle.
+     * @param cmHandleId the id of the cm handle
+     * @return persistence cm handle
+     */
+    public PersistenceCmHandle retrieveCmHandleDmiServiceNameAndProperties(final String cmHandleId) {
+        final DataNode cmHandleDataNode = getCmHandleDataNode(cmHandleId);
+        final CmHandle cmHandle = new CmHandle(cmHandleId, getCmHandleProperties(cmHandleDataNode));
+        return PersistenceCmHandle.toPersistenceCmHandle(
+            String.valueOf(cmHandleDataNode.getLeaves().get("dmi-service-name")),
+            String.valueOf(cmHandleDataNode.getLeaves().get("dmi-data-service-name")),
+            String.valueOf(cmHandleDataNode.getLeaves().get("dmi-model-service-name")),
+            cmHandle
+        );
+    }
+
+    private DataNode getCmHandleDataNode(final String cmHandle) {
+        final String xpathForDmiRegistryToFetchCmHandle = "/dmi-registry/cm-handles[@id='" + cmHandle + "']";
+        return cpsDataService.getDataNode(NCMP_DATASPACE_NAME,
+            NCMP_DMI_REGISTRY_ANCHOR,
+            xpathForDmiRegistryToFetchCmHandle,
+            FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
+    }
+
+    private static Map<String, String> getCmHandleProperties(final DataNode cmHandleDataNode) {
+        if (cmHandleDataNode.getChildDataNodes().isEmpty()) {
+            return Collections.emptyMap();
+        }
+        final Map<String, String> cmHandlePropertiesAsMap = new LinkedHashMap<>();
+        for (final DataNode childDataNode: cmHandleDataNode.getChildDataNodes()) {
+            cmHandlePropertiesAsMap.put(String.valueOf(childDataNode.getLeaves().get("name")),
+                String.valueOf(childDataNode.getLeaves().get("value")));
+        }
+        return cmHandlePropertiesAsMap;
+    }
+
+}