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+/*
+ * ================================================================================
+ * Copyright (c) 2018 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.dcae.analytics.tca.core.util;
+
+import static org.onap.dcae.analytics.tca.model.util.json.TcaModelJsonConversion.TCA_OBJECT_MAPPER;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+import org.onap.dcae.analytics.model.TcaModelConstants;
+import org.onap.dcae.analytics.model.cef.EventListener;
+import org.onap.dcae.analytics.tca.core.exception.AnalyticsParsingException;
+import org.onap.dcae.analytics.tca.model.policy.TcaPolicy;
+import org.onap.dcae.utils.eelf.logger.model.info.ServiceLogInfoImpl;
+
+/**
+ * @author Rajiv Singla
+ */
+public abstract class TcaUtils {
+
+ /**
+ * TCA Service Log Info for ECOMP Logging
+ */
+ public static final ServiceLogInfoImpl TCA_SERVICE_LOG_INFO =
+ new ServiceLogInfoImpl(TcaModelConstants.TCA_SERVICE_NAME, System.getProperty("user.name"), "");
+
+ /**
+ * Creates a deep copy of Tca Policy
+ *
+ * @param tcaPolicy source tca policy object
+ *
+ * @return deep copy of provided tca policy
+ */
+ public static TcaPolicy getTcaPolicyDeepCopy(final TcaPolicy tcaPolicy) {
+ if (tcaPolicy != null) {
+ try {
+ return TCA_OBJECT_MAPPER.treeToValue(TCA_OBJECT_MAPPER.valueToTree(tcaPolicy), TcaPolicy.class);
+ } catch (JsonProcessingException e) {
+ throw new AnalyticsParsingException("Unable to create deep copy of TCA Policy: " + tcaPolicy, e);
+ }
+ } else {
+ final String errorMessage = "Invalid application state. TCA Policy must not be null";
+ throw new AnalyticsParsingException(errorMessage, new IllegalStateException(errorMessage));
+ }
+ }
+
+
+ /**
+ * Converts given event Listeners to list of CEF Message String
+ *
+ * @param eventListeners event listeners object
+ *
+ * @return cef messages as string
+ */
+ public static List<String> getCefMessagesFromEventListeners(final List<EventListener> eventListeners) {
+ if (!Optional.ofNullable(eventListeners).isPresent()) {
+ return Collections.emptyList();
+ }
+ return eventListeners.stream().map(eventListener -> {
+ try {
+ return TCA_OBJECT_MAPPER.writeValueAsString(eventListener);
+ } catch (JsonProcessingException e) {
+ throw new AnalyticsParsingException("Unable to parse EventLister to String: " + eventListener, e);
+ }
+ }).collect(Collectors.toList());
+ }
+
+ private TcaUtils() {
+ // private constructor
+ }
+}