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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 Amdocs
+ * ================================================================================
+ * 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.aai.sa.searchdbabstraction.util;
+
+import com.jayway.jsonpath.DocumentContext;
+import com.jayway.jsonpath.JsonPath;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import org.apache.commons.io.IOUtils;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.onap.aai.cl.api.Logger;
+import org.onap.aai.cl.eelf.LoggerFactory;
+import org.onap.aai.sa.searchdbabstraction.logging.SearchDbMsgs;
+
+
+/**
+ * This class as the name suggests is to translate the payload of PUT & POST requests to ElasticSearch (ES) to its
+ * compatible syntax, specially compatible with ES v6 or above.
+ *
+ * For example, data type such as "string" is now replaced by "text" or "keyword".
+ *
+ * So this class will make those translations reading off from a json configuration file, therefore the configuration
+ * can be updated with new translations as and when required without touching the code.
+ *
+ * @author EDWINL
+ *
+ */
+public class ElasticSearchPayloadTranslator {
+
+ private static Logger logger =
+ LoggerFactory.getInstance().getLogger(ElasticSearchPayloadTranslator.class.getName());
+ private static final String CONFIG_DIRECTORY = System.getProperty("CONFIG_HOME");
+ private static final String ES_PAYLOAD_TRANSLATION_FILE = "es-payload-translation.json";
+
+ private ElasticSearchPayloadTranslator() { // Do not instantiate
+ }
+
+ /**
+ * Using JSON Path query to filter objects to translate the payload to ES compatible version The filter queries and
+ * the replacement attributes are configured in the es-payload-translation.json file.
+ *
+ * @param source
+ * @return translated payload in String
+ * @throws IOException
+ */
+ public static String translateESPayload(String source) throws IOException {
+ logger.info(SearchDbMsgs.PROCESS_PAYLOAD_QUERY, "translateESPayload, method-params[ source=" + source + "]",
+ "(unknown)");
+ String pathToTranslationFile = CONFIG_DIRECTORY + File.separator + ES_PAYLOAD_TRANSLATION_FILE;
+
+ try {
+ JSONObject translationConfigPayload =
+ new JSONObject(IOUtils.toString(new FileInputStream(new File(pathToTranslationFile)), "UTF-8"));
+ JSONArray attrTranslations = translationConfigPayload.getJSONArray("attr-translations");
+ DocumentContext payloadToTranslate = JsonPath.parse(source);
+
+ for (Object obj : attrTranslations) {
+ JSONObject jsonObj = ((JSONObject) obj);
+ String query = jsonObj.get("query").toString();
+ JSONObject attrToUpdate = (JSONObject) jsonObj.get("update");
+ List<Map<String, Object>> filteredObjects = payloadToTranslate.read(query);
+ for (Map<String, Object> objMap : filteredObjects) {
+ objMap.putAll(attrToUpdate.toMap());
+ }
+ }
+
+ logger.info(SearchDbMsgs.PROCESS_PAYLOAD_QUERY,
+ "Payload after translation: " + payloadToTranslate.jsonString());
+ return payloadToTranslate.jsonString();
+ } catch (JSONException ex) {
+ logger.error(SearchDbMsgs.FILTERS_CONFIG_FAILURE, ex, ES_PAYLOAD_TRANSLATION_FILE, ex.getMessage());
+ throw new IOException("Payload translation configuration looks corrupted. Please correct!", ex);
+ } catch (IOException ex) {
+ logger.error(SearchDbMsgs.FILTERS_CONFIG_FAILURE, ex, ES_PAYLOAD_TRANSLATION_FILE, ex.getMessage());
+ throw new IOException("Error in configuring payload translation file. Please check if it exists.", ex);
+ }
+ }
+}