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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.sparky.search.filters;
import java.util.ArrayList;
import java.util.List;
import javax.json.JsonObject;
import javax.ws.rs.core.MediaType;
import org.json.JSONArray;
import org.json.JSONObject;
import org.onap.aai.cl.api.Logger;
import org.onap.aai.cl.eelf.LoggerFactory;
import org.onap.aai.restclient.client.OperationResult;
import org.onap.aai.sparky.dal.ElasticSearchAdapter;
import org.onap.aai.sparky.logging.AaiUiMsgs;
import org.onap.aai.sparky.search.filters.config.UiFilterDataSourceConfig;
import org.onap.aai.sparky.search.filters.entity.UiFilterEntity;
import org.onap.aai.sparky.viewandinspect.config.SparkyConstants;
/**
* Performs all Elasticsearch related queries for filters related to
* the Sparky-FE.
*
* @author RICHARV
*/
public class FilterElasticSearchAdapter {
private static final Logger LOG = LoggerFactory.getInstance().getLogger(FilterElasticSearchAdapter.class);
private static final String AGGS = "aggregations";
private static final String CONTAINER = "default";
private static final String BUCKETS = "buckets";
private static final String FILTER_VALUE_KEY = "key";
private ElasticSearchAdapter elasticSearchAdapter;
public FilterElasticSearchAdapter(ElasticSearchAdapter elasticSearchAdapter) {
this.elasticSearchAdapter = elasticSearchAdapter;
}
/**
* For a given UiFilterEntity, will attempt to contact an Elasticsearch instance
* and fetch all possible values for filter's field name.
*
* @param filter - Filter object against which the search will take place.
* @param sourceData - If present, contains the index name and field value to search against.
* @return - A List of strings if results were found, else empty list.
*/
public List<String> fetchValuesForFilter(UiFilterEntity filter, UiFilterDataSourceConfig dataSourceConfig) {
ArrayList<String> filterValues = new ArrayList<String>();
if(dataSourceConfig != null) {
JsonObject filterValueQuery = null;
if(dataSourceConfig.getPathToField() != null) {
filterValueQuery = FilterQueryBuilder.createNestedFilterValueQueryObject(dataSourceConfig.getFieldName(), dataSourceConfig.getPathToField());
} else {
filterValueQuery = FilterQueryBuilder.createFilterValueQueryObject(dataSourceConfig.getFieldName());
}
OperationResult opResult = elasticSearchAdapter.doPost(
elasticSearchAdapter.buildElasticSearchUrlForApi(dataSourceConfig.getIndexName(),
SparkyConstants.ES_SEARCH_API),
filterValueQuery.toString(), MediaType.APPLICATION_JSON_TYPE);
String result = opResult.getResult();
if(opResult.wasSuccessful() && result != null) {
JSONObject responseJson = new JSONObject(result);
JSONObject aggJson = responseJson.getJSONObject(AGGS);
JSONObject containerJson = null;
if(dataSourceConfig.getPathToField() != null) {
JSONObject nestedContainer = aggJson.getJSONObject(dataSourceConfig.getPathToField());
containerJson = nestedContainer.getJSONObject(dataSourceConfig.getFieldName());
} else {
containerJson = aggJson.getJSONObject(CONTAINER);
}
JSONArray buckets = containerJson.getJSONArray(BUCKETS);
int bucketLength = buckets.length();
for(int i = 0; i < bucketLength; i++) {
JSONObject filterBucket = buckets.getJSONObject(i);
String filterValue = filterBucket.getString(FILTER_VALUE_KEY);
if(filterValue != null && !filterValue.isEmpty()) {
filterValues.add(filterValue);
}
}
} else {
LOG.error(AaiUiMsgs.ERROR_FETCHING_FILTER_VALUES, String.valueOf(opResult.getResultCode()), filter.getFilterName());
}
}
filterValues.sort(String::compareToIgnoreCase);
return filterValues;
}
}
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