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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.index.LeafReaderContext;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
* An aggregator that is not collected, this can typically be used when running an aggregation over a field that doesn't have
* a mapping.
*/
public abstract class NonCollectingAggregator extends AggregatorBase {
protected NonCollectingAggregator(String name, SearchContext context, Aggregator parent, AggregatorFactories subFactories,
List pipelineAggregators, Map metaData) throws IOException {
super(name, subFactories, context, parent, pipelineAggregators, metaData);
}
protected NonCollectingAggregator(String name, SearchContext context, Aggregator parent,
List pipelineAggregators, Map metaData) throws IOException {
this(name, context, parent, AggregatorFactories.EMPTY, pipelineAggregators, metaData);
}
@Override
public final LeafBucketCollector getLeafCollector(LeafReaderContext reader, LeafBucketCollector sub) {
// the framework will automatically eliminate it
return LeafBucketCollector.NO_OP_COLLECTOR;
}
@Override
public final InternalAggregation buildAggregation(long owningBucketOrdinal) {
return buildEmptyAggregation();
}
}