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diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/ParameterUtils.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/ParameterUtils.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2019 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.policy.common.endpoints.utils;
+
+import java.util.List;
+import java.util.Properties;
+
+import org.onap.policy.common.endpoints.parameters.TopicParameterGroup;
+import org.onap.policy.common.endpoints.parameters.TopicParameters;
+
+/**
+ * This is common utility class with utility methods for parameters.
+ *
+ * @author Ajith Sreekumar (ajith.sreekumar@est.tech)
+ */
+public abstract class ParameterUtils {
+
+ /**
+ * Private constructor used to prevent sub class instantiation.
+ */
+ private ParameterUtils() {
+ // Prevent construction of this class
+ }
+
+ /**
+ * Create topic properties object from the parameters.
+ *
+ * @param topicParameters the topic parameters read from config file
+ * @return the topic properties object
+ */
+ public static Properties getTopicProperties(TopicParameterGroup topicParameters) {
+ Properties topicProperties = new Properties();
+ List<TopicParameters> topicSources = topicParameters.getTopicSources();
+ List<TopicParameters> topicSinks = topicParameters.getTopicSinks();
+
+ // for each topicCommInfrastructure, there could be multiple topics (specified as comma separated string)
+ // for each such topics, there could be multiple servers (specified as comma separated string)
+ for (TopicParameters source : topicSources) {
+ addTopicProperties(topicProperties, ".source.topics", source);
+ }
+ for (TopicParameters sink : topicSinks) {
+ addTopicProperties(topicProperties, ".sink.topics", sink);
+ }
+
+ return topicProperties;
+ }
+
+ private static void addTopicProperties(Properties topicProperties, String keyName, TopicParameters topicParameter) {
+ String propKey = topicParameter.getTopicCommInfrastructure() + keyName;
+ if (topicProperties.containsKey(propKey)) {
+ topicProperties.setProperty(propKey,
+ topicProperties.getProperty(propKey) + "," + topicParameter.getTopic());
+ } else {
+ topicProperties.setProperty(propKey, topicParameter.getTopic());
+ }
+ topicProperties.setProperty(propKey + "." + topicParameter.getTopic() + ".servers",
+ String.join(",", topicParameter.getServers()));
+ }
+}