/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.ScoreCachingWrappingScorer;
import org.apache.lucene.search.Scorer;
import java.io.IOException;
/**
* @author kimchy (Shay Banon)
*/
public class MultiCollector extends Collector {
private final Collector collector;
private final Collector[] collectors;
public MultiCollector(Collector collector, Collector[] collectors) {
this.collector = collector;
this.collectors = collectors;
}
@Override public void setScorer(Scorer scorer) throws IOException {
// always wrap it in a scorer wrapper
if (!(scorer instanceof ScoreCachingWrappingScorer)) {
scorer = new ScoreCachingWrappingScorer(scorer);
}
collector.setScorer(scorer);
for (Collector collector : collectors) {
collector.setScorer(scorer);
}
}
@Override public void collect(int doc) throws IOException {
collector.collect(doc);
for (Collector collector : collectors) {
collector.collect(doc);
}
}
@Override public void setNextReader(IndexReader reader, int docBase) throws IOException {
collector.setNextReader(reader, docBase);
for (Collector collector : collectors) {
collector.setNextReader(reader, docBase);
}
}
@Override public boolean acceptsDocsOutOfOrder() {
if (!collector.acceptsDocsOutOfOrder()) {
return false;
}
for (Collector collector : collectors) {
if (!collector.acceptsDocsOutOfOrder()) {
return false;
}
}
return true;
}
}