/* * Licensed to Elasticsearch under one or more contributor * license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright * ownership. Elasticsearch licenses this file to you 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. */ package org.elasticsearch.search.fetch.matchedqueries; import com.google.common.collect.ImmutableMap; import org.apache.lucene.search.Query; import org.apache.lucene.search.Scorer; import org.apache.lucene.search.TwoPhaseIterator; import org.apache.lucene.search.Weight; import org.elasticsearch.ExceptionsHelper; import org.elasticsearch.search.SearchParseElement; import org.elasticsearch.search.fetch.FetchSubPhase; import org.elasticsearch.search.internal.InternalSearchHit; import org.elasticsearch.search.internal.SearchContext; import org.elasticsearch.search.internal.SearchContext.Lifetime; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * */ public class MatchedQueriesFetchSubPhase implements FetchSubPhase { @Override public Map<String, ? extends SearchParseElement> parseElements() { return ImmutableMap.of(); } @Override public boolean hitsExecutionNeeded(SearchContext context) { return false; } @Override public void hitsExecute(SearchContext context, InternalSearchHit[] hits) { } @Override public boolean hitExecutionNeeded(SearchContext context) { return !context.parsedQuery().namedFilters().isEmpty() || (context.parsedPostFilter() !=null && !context.parsedPostFilter().namedFilters().isEmpty()); } @Override public void hitExecute(SearchContext context, HitContext hitContext) { List<String> matchedQueries = new ArrayList<>(2); try { addMatchedQueries(hitContext, context.parsedQuery().namedFilters(), matchedQueries); if (context.parsedPostFilter() != null) { addMatchedQueries(hitContext, context.parsedPostFilter().namedFilters(), matchedQueries); } } catch (IOException e) { throw ExceptionsHelper.convertToElastic(e); } finally { SearchContext.current().clearReleasables(Lifetime.COLLECTION); } hitContext.hit().matchedQueries(matchedQueries.toArray(new String[matchedQueries.size()])); } private void addMatchedQueries(HitContext hitContext, ImmutableMap<String, Query> namedQueries, List<String> matchedQueries) throws IOException { for (Map.Entry<String, Query> entry : namedQueries.entrySet()) { String name = entry.getKey(); Query filter = entry.getValue(); final Weight weight = hitContext.topLevelSearcher().createNormalizedWeight(filter, false); final Scorer scorer = weight.scorer(hitContext.readerContext()); if (scorer == null) { continue; } final TwoPhaseIterator twoPhase = scorer.twoPhaseIterator(); if (twoPhase == null) { if (scorer.iterator().advance(hitContext.docId()) == hitContext.docId()) { matchedQueries.add(name); } } else { if (twoPhase.approximation().advance(hitContext.docId()) == hitContext.docId() && twoPhase.matches()) { matchedQueries.add(name); } } } } }