org.elasticsearch.common.lucene.search.FilteredCollector 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.common.lucene.search;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.util.Bits;
import org.elasticsearch.common.lucene.docset.DocIdSets;
import java.io.IOException;
/**
*
*/
public class FilteredCollector extends XCollector {
private final Collector collector;
private final Filter filter;
private Bits docSet;
public FilteredCollector(Collector collector, Filter filter) {
this.collector = collector;
this.filter = filter;
}
@Override
public void postCollection() {
if (collector instanceof XCollector) {
((XCollector) collector).postCollection();
}
}
@Override
public void setScorer(Scorer scorer) throws IOException {
collector.setScorer(scorer);
}
@Override
public void collect(int doc) throws IOException {
if (docSet.get(doc)) {
collector.collect(doc);
}
}
@Override
public void setNextReader(AtomicReaderContext context) throws IOException {
collector.setNextReader(context);
docSet = DocIdSets.toSafeBits(context.reader(), filter.getDocIdSet(context, null));
}
@Override
public boolean acceptsDocsOutOfOrder() {
return collector.acceptsDocsOutOfOrder();
}
}