org.elasticsearch.search.fetch.subphase.FetchScorePhase 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.IndexSearcher;
import org.apache.lucene.search.ScoreMode;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.ScorerSupplier;
import org.apache.lucene.search.Weight;
import org.elasticsearch.search.fetch.FetchContext;
import org.elasticsearch.search.fetch.FetchSubPhase;
import org.elasticsearch.search.fetch.FetchSubPhaseProcessor;
import java.io.IOException;
public class FetchScorePhase implements FetchSubPhase {
@Override
public FetchSubPhaseProcessor getProcessor(FetchContext context) throws IOException {
if (context.fetchScores() == false) {
return null;
}
final IndexSearcher searcher = context.searcher();
final Weight weight = searcher.createWeight(context.rewrittenQuery(), ScoreMode.COMPLETE, 1);
return new FetchSubPhaseProcessor() {
Scorer scorer;
@Override
public void setNextReader(LeafReaderContext readerContext) throws IOException {
ScorerSupplier scorerSupplier = weight.scorerSupplier(readerContext);
if (scorerSupplier == null) {
throw new IllegalStateException("Can't compute score on document as it doesn't match the query");
}
scorer = scorerSupplier.get(1L); // random-access
}
@Override
public void process(HitContext hitContext) throws IOException {
if (scorer == null || scorer.iterator().advance(hitContext.docId()) != hitContext.docId()) {
throw new IllegalStateException("Can't compute score on document " + hitContext + " as it doesn't match the query");
}
hitContext.hit().score(scorer.score());
}
};
}
}