org.elasticsearch.search.fetch.subphase.MatchedQueriesFetchSubPhase Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.subphase;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.ReaderUtil;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.Weight;
import org.apache.lucene.util.Bits;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.common.lucene.Lucene;
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.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public final class MatchedQueriesFetchSubPhase implements FetchSubPhase {
@Override
public void hitsExecute(SearchContext context, InternalSearchHit[] hits) {
if (hits.length == 0 ||
// in case the request has only suggest, parsed query is null
context.parsedQuery() == null) {
return;
}
hits = hits.clone(); // don't modify the incoming hits
Arrays.sort(hits, (a, b) -> Integer.compare(a.docId(), b.docId()));
@SuppressWarnings("unchecked")
List[] matchedQueries = new List[hits.length];
for (int i = 0; i < matchedQueries.length; ++i) {
matchedQueries[i] = new ArrayList<>();
}
Map namedQueries = new HashMap<>(context.parsedQuery().namedFilters());
if (context.parsedPostFilter() != null) {
namedQueries.putAll(context.parsedPostFilter().namedFilters());
}
try {
for (Map.Entry entry : namedQueries.entrySet()) {
String name = entry.getKey();
Query query = entry.getValue();
int readerIndex = -1;
int docBase = -1;
Weight weight = context.searcher().createNormalizedWeight(query, false);
Bits matchingDocs = null;
final IndexReader indexReader = context.searcher().getIndexReader();
for (int i = 0; i < hits.length; ++i) {
InternalSearchHit hit = hits[i];
int hitReaderIndex = ReaderUtil.subIndex(hit.docId(), indexReader.leaves());
if (readerIndex != hitReaderIndex) {
readerIndex = hitReaderIndex;
LeafReaderContext ctx = indexReader.leaves().get(readerIndex);
docBase = ctx.docBase;
// scorers can be costly to create, so reuse them across docs of the same segment
Scorer scorer = weight.scorer(ctx);
matchingDocs = Lucene.asSequentialAccessBits(ctx.reader().maxDoc(), scorer);
}
if (matchingDocs.get(hit.docId() - docBase)) {
matchedQueries[i].add(name);
}
}
}
for (int i = 0; i < hits.length; ++i) {
hits[i].matchedQueries(matchedQueries[i].toArray(new String[matchedQueries[i].size()]));
}
} catch (IOException e) {
throw ExceptionsHelper.convertToElastic(e);
} finally {
context.clearReleasables(Lifetime.COLLECTION);
}
}
}