org.elasticsearch.search.fetch.subphase.MatchedQueriesPhase Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.fetch.subphase;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreMode;
import org.apache.lucene.search.ScorerSupplier;
import org.apache.lucene.search.Weight;
import org.apache.lucene.util.Bits;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.search.fetch.FetchContext;
import org.elasticsearch.search.fetch.FetchSubPhase;
import org.elasticsearch.search.fetch.FetchSubPhaseProcessor;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public final class MatchedQueriesPhase implements FetchSubPhase {
@Override
public FetchSubPhaseProcessor getProcessor(FetchContext context) throws IOException {
Map namedQueries = new HashMap<>();
if (context.parsedQuery() != null) {
namedQueries.putAll(context.parsedQuery().namedFilters());
}
if (context.parsedPostFilter() != null) {
namedQueries.putAll(context.parsedPostFilter().namedFilters());
}
if (namedQueries.isEmpty()) {
return null;
}
Map weights = new HashMap<>();
for (Map.Entry entry : namedQueries.entrySet()) {
weights.put(
entry.getKey(),
context.searcher().createWeight(context.searcher().rewrite(entry.getValue()), ScoreMode.COMPLETE_NO_SCORES, 1)
);
}
return new FetchSubPhaseProcessor() {
final Map matchingIterators = new HashMap<>();
@Override
public void setNextReader(LeafReaderContext readerContext) throws IOException {
matchingIterators.clear();
for (Map.Entry entry : weights.entrySet()) {
ScorerSupplier ss = entry.getValue().scorerSupplier(readerContext);
if (ss != null) {
Bits matchingBits = Lucene.asSequentialAccessBits(readerContext.reader().maxDoc(), ss);
matchingIterators.put(entry.getKey(), matchingBits);
}
}
}
@Override
public void process(HitContext hitContext) {
List matches = new ArrayList<>();
int doc = hitContext.docId();
for (Map.Entry iterator : matchingIterators.entrySet()) {
if (iterator.getValue().get(doc)) {
matches.add(iterator.getKey());
}
}
hitContext.hit().matchedQueries(matches.toArray(new String[0]));
}
};
}
}