org.elasticsearch.search.fetch.subphase.InnerHitsPhase Maven / Gradle / Ivy
/*
* 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.FieldDoc;
import org.apache.lucene.search.ScoreDoc;
import org.elasticsearch.common.lucene.search.TopDocsAndMaxScore;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.fetch.FetchContext;
import org.elasticsearch.search.fetch.FetchPhase;
import org.elasticsearch.search.fetch.FetchSearchResult;
import org.elasticsearch.search.fetch.FetchSubPhase;
import org.elasticsearch.search.fetch.FetchSubPhaseProcessor;
import org.elasticsearch.search.lookup.SourceLookup;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public final class InnerHitsPhase implements FetchSubPhase {
private final FetchPhase fetchPhase;
public InnerHitsPhase(FetchPhase fetchPhase) {
this.fetchPhase = fetchPhase;
}
@Override
public FetchSubPhaseProcessor getProcessor(FetchContext searchContext) {
if (searchContext.innerHits() == null || searchContext.innerHits().getInnerHits().isEmpty()) {
return null;
}
Map innerHits = searchContext.innerHits().getInnerHits();
return new FetchSubPhaseProcessor() {
@Override
public void setNextReader(LeafReaderContext readerContext) {
}
@Override
public void process(HitContext hitContext) throws IOException {
SearchHit hit = hitContext.hit();
SourceLookup rootLookup = searchContext.getRootSourceLookup(hitContext);
hitExecute(innerHits, hit, rootLookup);
}
};
}
private void hitExecute(Map innerHits, SearchHit hit, SourceLookup rootLookup)
throws IOException {
for (Map.Entry entry : innerHits.entrySet()) {
InnerHitsContext.InnerHitSubContext innerHitsContext = entry.getValue();
TopDocsAndMaxScore topDoc = innerHitsContext.topDocs(hit);
Map results = hit.getInnerHits();
if (results == null) {
hit.setInnerHits(results = new HashMap<>());
}
innerHitsContext.queryResult().topDocs(topDoc, innerHitsContext.sort() == null ? null : innerHitsContext.sort().formats);
int[] docIdsToLoad = new int[topDoc.topDocs.scoreDocs.length];
for (int j = 0; j < topDoc.topDocs.scoreDocs.length; j++) {
docIdsToLoad[j] = topDoc.topDocs.scoreDocs[j].doc;
}
innerHitsContext.docIdsToLoad(docIdsToLoad, docIdsToLoad.length);
innerHitsContext.setRootId(hit.getId());
innerHitsContext.setRootLookup(rootLookup);
fetchPhase.execute(innerHitsContext);
FetchSearchResult fetchResult = innerHitsContext.fetchResult();
SearchHit[] internalHits = fetchResult.fetchResult().hits().getHits();
for (int j = 0; j < internalHits.length; j++) {
ScoreDoc scoreDoc = topDoc.topDocs.scoreDocs[j];
SearchHit searchHitFields = internalHits[j];
searchHitFields.score(scoreDoc.score);
if (scoreDoc instanceof FieldDoc fieldDoc) {
searchHitFields.sortValues(fieldDoc.fields, innerHitsContext.sort().formats);
}
}
results.put(entry.getKey(), fetchResult.hits());
}
}
}