1 files changed, 78 insertions, 0 deletions
diff --git a/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/utils/ControlLoopUtils.java b/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/utils/ControlLoopUtils.java
new file mode 100644
index 000000000..8b7876c71
--- /dev/null
+++ b/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/utils/ControlLoopUtils.java
@@ -0,0 +1,78 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.controlloop.utils;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.policy.controlloop.ControlLoopException;
+import org.onap.policy.controlloop.params.ControlLoopParams;
+import org.onap.policy.controlloop.processor.ControlLoopProcessor;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Control Loop Utils.
+ */
+public class ControlLoopUtils {
+
+    public static final Logger logger = LoggerFactory.getLogger(ControlLoopUtils.class);
+    public static final String TOSCA_POLICY_PROPERTY_CONTENT = "content";
+
+    /**
+     * Get a Control Loop Parameters object from a Tosca Policy.
+     */
+    public static ControlLoopParams toControlLoopParams(ToscaPolicy policy) {
+
+        // TODO: ControlLoopParams class should be moved to this repo and take Tosca Policy in a constructor.
+
+        /* No exceptions are thrown to keep the DRL simpler */
+
+        try {
+            if (policy == null || policy.getProperties() == null
+                || policy.getProperties().get(TOSCA_POLICY_PROPERTY_CONTENT) == null) {
+                logger.error("Invalid Policy: {}", policy);
+                return null;
+            }
+
+            String encodedPolicy = policy.getProperties().get(TOSCA_POLICY_PROPERTY_CONTENT).toString();
+            String decodedPolicy = URLDecoder.decode(encodedPolicy, "UTF-8");
+
+            ControlLoopProcessor controlLoopProcessor = new ControlLoopProcessor(decodedPolicy);
+            if (controlLoopProcessor.getControlLoop() == null
+                || StringUtils.isEmpty(controlLoopProcessor.getControlLoop().getControlLoopName())) {
+                return null;
+            }
+
+            ControlLoopParams controlLoopParams = new ControlLoopParams();
+            controlLoopParams.setClosedLoopControlName(controlLoopProcessor.getControlLoop().getControlLoopName());
+            controlLoopParams.setControlLoopYaml(encodedPolicy);
+            controlLoopParams.setPolicyScope(policy.getType() + ":" + policy.getTypeVersion());
+            controlLoopParams.setPolicyName(policy.getName());
+            controlLoopParams.setPolicyVersion(policy.getVersion());
+
+            return controlLoopParams;
+        } catch (ControlLoopException | RuntimeException | UnsupportedEncodingException e) {
+            logger.error("Invalid Policy because of {}: {}", e.getMessage(), policy, e);
+            return null;
+        }
+    }
+
+}