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* 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.aggregations;
import org.apache.lucene.search.Scorer;
import org.elasticsearch.common.lucene.ScorerAware;
import java.io.IOException;
/**
* A {@link LeafBucketCollector} that delegates all calls to the sub leaf
* aggregator and sets the scorer on its source of values if it implements
* {@link ScorerAware}.
*/
public class LeafBucketCollectorBase extends LeafBucketCollector {
private final LeafBucketCollector sub;
private final ScorerAware values;
/**
* @param sub The leaf collector for sub aggregations.
* @param values The values. {@link ScorerAware#setScorer} will be called automatically on them if they implement {@link ScorerAware}.
*/
public LeafBucketCollectorBase(LeafBucketCollector sub, Object values) {
this.sub = sub;
if (values instanceof ScorerAware) {
this.values = (ScorerAware) values;
} else {
this.values = null;
}
}
@Override
public void setScorer(Scorer s) throws IOException {
sub.setScorer(s);
if (values != null) {
values.setScorer(s);
}
}
@Override
public void collect(int doc, long bucket) throws IOException {
sub.collect(doc, bucket);
}
}