add correlation analysis

Issue-ID: HOLMES-44

Change-Id: I357587ff182c3bc900f3a03ca3a28a7d73d9564a
Signed-off-by: Shiwei Tian <tian.shiwei@zte.com.cn>

diff --git a/holmes-actions/src/main/java/org/onap/holmes/common/aai/CorrelationUtil.java b/holmes-actions/src/main/java/org/onap/holmes/common/aai/CorrelationUtil.java
new file mode 100644 (file)
index 0000000..d0a4160
--- /dev/null
+++ b/holmes-actions/src/main/java/org/onap/holmes/common/aai/CorrelationUtil.java
@@ -0,0 +1,64 @@
+/**
+ * Copyright 2017 ZTE Corporation.
+ *
+ * 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.
+ */
+package org.onap.holmes.common.aai;
+
+import java.util.List;
+import java.util.Optional;
+import lombok.extern.slf4j.Slf4j;
+import org.onap.holmes.common.aai.entity.RelationshipList.Relationship;
+import org.onap.holmes.common.aai.entity.VmEntity;
+import org.onap.holmes.common.exception.CorrelationException;
+
+@Slf4j
+public class CorrelationUtil {
+
+    private AaiQuery aaiQuery;
+
+    private static class LazyHolder {
+        private static final CorrelationUtil INSTANCE = new CorrelationUtil();
+    }
+    private CorrelationUtil (){}
+
+    public static final CorrelationUtil getInstance() {
+        return LazyHolder.INSTANCE;
+    }
+
+    public boolean isTopologicallyRelated(String childId, String rootId) {
+
+        return Optional.ofNullable(getVmEntity(rootId)).map(vmEntity ->
+                getIsRelated(childId, vmEntity)).orElse(false);
+    }
+
+    private boolean getIsRelated(String childId, VmEntity vmEntity) {
+        List<Relationship> relationships = vmEntity.getRelationshipList().getRelationships();
+        for (Relationship relationship : relationships) {
+            boolean isRelated = relationship.getRelationshipDataList().stream().anyMatch(
+                    relationshipData -> relationshipData.getRelationshipValue().equals(childId));
+            if (isRelated) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private VmEntity getVmEntity(String rootId) {
+        VmEntity vmEntity = null;
+        try {
+            vmEntity = aaiQuery.getAaiVmData("", rootId);
+        } catch (CorrelationException e) {
+            log.error("Failed to get vm data", e.getMessage());
+        }
+        return vmEntity;
+    }
+}