org.elasticsearch.search.internal.DocIdSetCollector Maven / Gradle / Ivy
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* 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.internal;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.util.FixedBitSet;
import org.elasticsearch.common.lucene.docset.ContextDocIdSet;
import org.elasticsearch.common.lucene.search.XCollector;
import org.elasticsearch.index.cache.docset.DocSetCache;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
*/
public class DocIdSetCollector extends XCollector {
private final DocSetCache docSetCache;
private final Collector collector;
private final List docSets;
private boolean currentHasDocs;
private ContextDocIdSet currentContext;
private FixedBitSet currentSet;
public DocIdSetCollector(DocSetCache docSetCache, Collector collector) {
this.docSetCache = docSetCache;
this.collector = collector;
this.docSets = new ArrayList();
}
public List docSets() {
return docSets;
}
public void release() {
for (ContextDocIdSet docSet : docSets) {
docSetCache.release(docSet);
}
}
@Override
public void setScorer(Scorer scorer) throws IOException {
collector.setScorer(scorer);
}
@Override
public void collect(int doc) throws IOException {
collector.collect(doc);
currentHasDocs = true;
currentSet.set(doc);
}
@Override
public void setNextReader(AtomicReaderContext context) throws IOException {
collector.setNextReader(context);
if (currentContext != null) {
if (currentHasDocs) {
docSets.add(currentContext);
} else {
docSetCache.release(currentContext);
}
}
currentContext = docSetCache.obtain(context);
currentSet = (FixedBitSet) currentContext.docSet;
currentHasDocs = false;
}
@Override
public void postCollection() {
if (collector instanceof XCollector) {
((XCollector) collector).postCollection();
}
if (currentContext != null) {
if (currentHasDocs) {
docSets.add(currentContext);
} else {
docSetCache.release(currentContext);
}
currentContext = null;
currentSet = null;
currentHasDocs = false;
}
}
@Override
public boolean acceptsDocsOutOfOrder() {
return true;
}
}