/*
* 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.terms;
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.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.BucketOrder;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
/**
* Result of the {@link TermsAggregator} when the field is some kind of decimal number like a float, double, or distance.
*/
public class DoubleTerms extends InternalMappedTerms<DoubleTerms, DoubleTerms.Bucket> {
public static final String NAME = "dterms";
static class Bucket extends InternalTerms.Bucket<Bucket> {
private final double term;
Bucket(double term, long docCount, InternalAggregations aggregations, boolean showDocCountError, long docCountError,
DocValueFormat format) {
super(docCount, aggregations, showDocCountError, docCountError, format);
this.term = term;
}
/**
* Read from a stream.
*/
Bucket(StreamInput in, DocValueFormat format, boolean showDocCountError) throws IOException {
super(in, format, showDocCountError);
term = in.readDouble();
}
@Override
protected void writeTermTo(StreamOutput out) throws IOException {
out.writeDouble(term);
}
@Override
public String getKeyAsString() {
return format.format(term);
}
@Override
public Object getKey() {
return term;
}
@Override
public Number getKeyAsNumber() {
return term;
}
@Override
public int compareKey(Bucket other) {
return Double.compare(term, other.term);
}
@Override
Bucket newBucket(long docCount, InternalAggregations aggs, long docCountError) {
return new Bucket(term, docCount, aggs, showDocCountError, docCountError, format);
}
@Override
protected final XContentBuilder keyToXContent(XContentBuilder builder) throws IOException {
builder.field(CommonFields.KEY.getPreferredName(), term);
if (format != DocValueFormat.RAW) {
builder.field(CommonFields.KEY_AS_STRING.getPreferredName(), format.format(term));
}
return builder;
}
@Override
public boolean equals(Object obj) {
return super.equals(obj) && Objects.equals(term, ((Bucket) obj).term);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), term);
}
}
public DoubleTerms(String name, BucketOrder order, int requiredSize, long minDocCount, List<PipelineAggregator> pipelineAggregators,
Map<String, Object> metaData, DocValueFormat format, int shardSize, boolean showTermDocCountError, long otherDocCount,
List<Bucket> buckets, long docCountError) {
super(name, order, requiredSize, minDocCount, pipelineAggregators, metaData, format, shardSize, showTermDocCountError,
otherDocCount, buckets, docCountError);
}
/**
* Read from a stream.
*/
public DoubleTerms(StreamInput in) throws IOException {
super(in, Bucket::new);
}
@Override
public String getWriteableName() {
return NAME;
}
@Override
public DoubleTerms create(List<Bucket> buckets) {
return new DoubleTerms(name, order, requiredSize, minDocCount, this.pipelineAggregators(), metaData, format, shardSize,
showTermDocCountError, otherDocCount, buckets, docCountError);
}
@Override
public Bucket createBucket(InternalAggregations aggregations, Bucket prototype) {
return new Bucket(prototype.term, prototype.docCount, aggregations, prototype.showDocCountError, prototype.docCountError,
prototype.format);
}
@Override
protected DoubleTerms create(String name, List<Bucket> buckets, long docCountError, long otherDocCount) {
return new DoubleTerms(name, order, requiredSize, minDocCount, pipelineAggregators(), getMetaData(), format,
shardSize, showTermDocCountError, otherDocCount, buckets, docCountError);
}
@Override
protected Bucket[] createBucketsArray(int size) {
return new Bucket[size];
}
@Override
public InternalAggregation doReduce(List<InternalAggregation> aggregations, ReduceContext reduceContext) {
boolean promoteToDouble = false;
for (InternalAggregation agg : aggregations) {
if (agg instanceof LongTerms && ((LongTerms) agg).format == DocValueFormat.RAW) {
/*
* this terms agg mixes longs and doubles, we must promote longs to doubles to make the internal aggs
* compatible
*/
promoteToDouble = true;
break;
}
}
if (promoteToDouble == false) {
return super.doReduce(aggregations, reduceContext);
}
List<InternalAggregation> newAggs = new ArrayList<>(aggregations.size());
for (InternalAggregation agg : aggregations) {
if (agg instanceof LongTerms) {
DoubleTerms dTerms = LongTerms.convertLongTermsToDouble((LongTerms) agg, format);
newAggs.add(dTerms);
} else {
newAggs.add(agg);
}
}
return newAggs.get(0).doReduce(newAggs, reduceContext);
}
}