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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.apache.lucene.util.BytesRef;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.InternalAggregations;
import org.elasticsearch.search.aggregations.bucket.significant.heuristics.SignificanceHeuristic;
import org.elasticsearch.search.aggregations.bucket.terms.InternalTerms;
import org.elasticsearch.search.aggregations.bucket.terms.UnmappedTerms;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import static java.util.Collections.emptyList;
/**
* Result of the running the significant terms aggregation on an unmapped field.
*/
public class UnmappedSignificantTerms extends InternalSignificantTerms<UnmappedSignificantTerms, UnmappedSignificantTerms.Bucket> {
public static final String NAME = "umsigterms";
/**
* Concrete type that can't be built because Java needs a concrent type so {@link InternalTerms.Bucket} can have a self type but
* {@linkplain UnmappedTerms} doesn't ever need to build it because it never returns any buckets.
*/
protected abstract static class Bucket extends InternalSignificantTerms.Bucket<Bucket> {
private Bucket(BytesRef term, long subsetDf, long subsetSize, long supersetDf, long supersetSize, InternalAggregations aggregations,
DocValueFormat format) {
super(subsetDf, subsetSize, supersetDf, supersetSize, aggregations, format);
}
}
public UnmappedSignificantTerms(String name, int requiredSize, long minDocCount, List<PipelineAggregator> pipelineAggregators,
Map<String, Object> metaData) {
super(name, requiredSize, minDocCount, pipelineAggregators, metaData);
}
/**
* Read from a stream.
*/
public UnmappedSignificantTerms(StreamInput in) throws IOException {
super(in);
}
@Override
protected void writeTermTypeInfoTo(StreamOutput out) throws IOException {
// Nothing to write
}
@Override
public String getWriteableName() {
return NAME;
}
@Override
protected String getType() {
return SignificantStringTerms.NAME;
}
@Override
public UnmappedSignificantTerms create(List<Bucket> buckets) {
return new UnmappedSignificantTerms(name, requiredSize, minDocCount, pipelineAggregators(), metaData);
}
@Override
public Bucket createBucket(InternalAggregations aggregations, Bucket prototype) {
throw new UnsupportedOperationException("not supported for UnmappedSignificantTerms");
}
@Override
protected UnmappedSignificantTerms create(long subsetSize, long supersetSize, List<Bucket> buckets) {
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
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
builder.startArray(CommonFields.BUCKETS).endArray();
return builder;
}
@Override
protected Bucket[] createBucketsArray(int size) {
return new Bucket[size];
}
@Override
protected List<Bucket> getBucketsInternal() {
return emptyList();
}
@Override
public SignificantTerms.Bucket getBucketByKey(String term) {
return null;
}
@Override
protected SignificanceHeuristic getSignificanceHeuristic() {
throw new UnsupportedOperationException();
}
@Override
protected long getSubsetSize() {
return 0;
}
@Override
protected long getSupersetSize() {
return 0;
}
}
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