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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.bucket.significant;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.AggregationStreams;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.bucket.significant.heuristics.JLHScore;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
*
*/
public class UnmappedSignificantTerms extends InternalSignificantTerms<UnmappedSignificantTerms, InternalSignificantTerms.Bucket> {
public static final Type TYPE = new Type("significant_terms", "umsigterms");
private static final List<Bucket> BUCKETS = Collections.emptyList();
private static final Map<String, Bucket> BUCKETS_MAP = Collections.emptyMap();
public static final AggregationStreams.Stream STREAM = new AggregationStreams.Stream() {
@Override
public UnmappedSignificantTerms readResult(StreamInput in) throws IOException {
UnmappedSignificantTerms buckets = new UnmappedSignificantTerms();
buckets.readFrom(in);
return buckets;
}
};
public static void registerStreams() {
AggregationStreams.registerStream(STREAM, TYPE.stream());
}
UnmappedSignificantTerms() {} // for serialization
public UnmappedSignificantTerms(String name, int requiredSize, long minDocCount, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) {
//We pass zero for index/subset sizes because for the purpose of significant term analysis
// we assume an unmapped index's size is irrelevant to the proceedings.
super(0, 0, name, requiredSize, minDocCount, JLHScore.PROTOTYPE, BUCKETS, pipelineAggregators, metaData);
}
@Override
public Type type() {
return TYPE;
}
@Override
public UnmappedSignificantTerms create(List<InternalSignificantTerms.Bucket> buckets) {
return new UnmappedSignificantTerms(this.name, this.requiredSize, this.minDocCount, this.pipelineAggregators(), this.metaData);
}
@Override
public InternalSignificantTerms.Bucket createBucket(InternalAggregations aggregations, InternalSignificantTerms.Bucket prototype) {
throw new UnsupportedOperationException("not supported for UnmappedSignificantTerms");
}
@Override
protected UnmappedSignificantTerms create(long subsetSize, long supersetSize, List<Bucket> buckets, InternalSignificantTerms prototype) {
throw new UnsupportedOperationException("not supported for UnmappedSignificantTerms");
}
@Override
public InternalAggregation doReduce(List<InternalAggregation> aggregations, ReduceContext reduceContext) {
for (InternalAggregation aggregation : aggregations) {
if (!(aggregation instanceof UnmappedSignificantTerms)) {
return aggregation.reduce(aggregations, reduceContext);
}
}
return this;
}
@Override
protected void doReadFrom(StreamInput in) throws IOException {
this.requiredSize = readSize(in);
this.minDocCount = in.readVLong();
this.buckets = BUCKETS;
this.bucketMap = BUCKETS_MAP;
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
writeSize(requiredSize, out);
out.writeVLong(minDocCount);
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
builder.startArray(CommonFields.BUCKETS).endArray();
return builder;
}
}
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