/*
* 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.bucket.sampler;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import java.io.IOException;
import java.util.List;
import java.util.Map;
public class UnmappedSampler extends InternalSampler {
public static final String NAME = "unmapped_sampler";
UnmappedSampler(String name, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) {
super(name, 0, InternalAggregations.EMPTY, pipelineAggregators, metaData);
}
/**
* Read from a stream.
*/
public UnmappedSampler(StreamInput in) throws IOException {
super(in);
}
@Override
public String getWriteableName() {
return NAME;
}
@Override
public InternalAggregation doReduce(List<InternalAggregation> aggregations, ReduceContext reduceContext) {
for (InternalAggregation agg : aggregations) {
if (!(agg instanceof UnmappedSampler)) {
return agg.reduce(aggregations, reduceContext);
}
}
return this;
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
builder.field(Aggregation.CommonFields.DOC_COUNT.getPreferredName(), 0);
return builder;
}
}