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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.InternalAggregations;
import org.elasticsearch.search.aggregations.bucket.significant.heuristics.SignificanceHeuristic;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
/**
* Result of the running the significant terms aggregation on a String field.
*/
public class SignificantStringTerms extends InternalMappedSignificantTerms<SignificantStringTerms, SignificantStringTerms.Bucket> {
public static final String NAME = "sigsterms";
public static class Bucket extends InternalSignificantTerms.Bucket<Bucket> {
BytesRef termBytes;
public Bucket(BytesRef term, long subsetDf, long subsetSize, long supersetDf, long supersetSize, InternalAggregations aggregations,
DocValueFormat format) {
super(subsetDf, subsetSize, supersetDf, supersetSize, aggregations, format);
this.termBytes = term;
}
/**
* Read from a stream.
*/
public Bucket(StreamInput in, long subsetSize, long supersetSize, DocValueFormat format) throws IOException {
super(in, subsetSize, supersetSize, format);
termBytes = in.readBytesRef();
subsetDf = in.readVLong();
supersetDf = in.readVLong();
score = in.readDouble();
aggregations = InternalAggregations.readAggregations(in);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeBytesRef(termBytes);
out.writeVLong(subsetDf);
out.writeVLong(supersetDf);
out.writeDouble(getSignificanceScore());
aggregations.writeTo(out);
}
public Bucket(BytesRef term, long subsetDf, long subsetSize, long supersetDf, long supersetSize,
InternalAggregations aggregations, double score, DocValueFormat format) {
this(term, subsetDf, subsetSize, supersetDf, supersetSize, aggregations, format);
this.score = score;
}
@Override
public Number getKeyAsNumber() {
// this method is needed for scripted numeric aggregations
return Double.parseDouble(termBytes.utf8ToString());
}
@Override
public int compareTerm(SignificantTerms.Bucket other) {
return termBytes.compareTo(((Bucket) other).termBytes);
}
@Override
public String getKeyAsString() {
return format.format(termBytes);
}
@Override
public String getKey() {
return getKeyAsString();
}
@Override
Bucket newBucket(long subsetDf, long subsetSize, long supersetDf, long supersetSize, InternalAggregations aggregations) {
return new Bucket(termBytes, subsetDf, subsetSize, supersetDf, supersetSize, aggregations, format);
}
@Override
protected XContentBuilder keyToXContent(XContentBuilder builder) throws IOException {
return builder.field(CommonFields.KEY.getPreferredName(), getKeyAsString());
}
@Override
public boolean equals(Object obj) {
return super.equals(obj) && Objects.equals(termBytes, ((SignificantStringTerms.Bucket) obj).termBytes);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), termBytes);
}
}
public SignificantStringTerms(String name, int requiredSize, long minDocCount, List<PipelineAggregator> pipelineAggregators,
Map<String, Object> metaData, DocValueFormat format, long subsetSize, long supersetSize,
SignificanceHeuristic significanceHeuristic, List<Bucket> buckets) {
super(name, requiredSize, minDocCount, pipelineAggregators, metaData, format, subsetSize, supersetSize, significanceHeuristic,
buckets);
}
/**
* Read from a stream.
*/
public SignificantStringTerms(StreamInput in) throws IOException {
super(in, Bucket::new);
}
@Override
public String getWriteableName() {
return NAME;
}
@Override
public SignificantStringTerms create(List<SignificantStringTerms.Bucket> buckets) {
return new SignificantStringTerms(name, requiredSize, minDocCount, pipelineAggregators(), metaData, format, subsetSize,
supersetSize, significanceHeuristic, buckets);
}
@Override
public Bucket createBucket(InternalAggregations aggregations, SignificantStringTerms.Bucket prototype) {
return new Bucket(prototype.termBytes, prototype.subsetDf, prototype.subsetSize, prototype.supersetDf, prototype.supersetSize,
aggregations, prototype.format);
}
@Override
protected SignificantStringTerms create(long subsetSize, long supersetSize, List<Bucket> buckets) {
return new SignificantStringTerms(getName(), requiredSize, minDocCount, pipelineAggregators(), getMetaData(), format, subsetSize,
supersetSize, significanceHeuristic, buckets);
}
@Override
protected Bucket[] createBucketsArray(int size) {
return new Bucket[size];
}
}
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