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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.terms;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.SortedNumericDocValues;
import org.apache.lucene.util.NumericUtils;
import org.elasticsearch.index.fielddata.FieldData;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.bucket.terms.support.IncludeExclude;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import org.elasticsearch.search.aggregations.support.ValuesSource.Numeric;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
*
*/
public class DoubleTermsAggregator extends LongTermsAggregator {
public DoubleTermsAggregator(String name, AggregatorFactories factories, ValuesSource.Numeric valuesSource, DocValueFormat format,
Terms.Order order, BucketCountThresholds bucketCountThresholds, AggregationContext aggregationContext, Aggregator parent,
SubAggCollectionMode collectionMode, boolean showTermDocCountError, IncludeExclude.LongFilter longFilter,
List pipelineAggregators, Map metaData) throws IOException {
super(name, factories, valuesSource, format, order, bucketCountThresholds, aggregationContext, parent, collectionMode,
showTermDocCountError, longFilter, pipelineAggregators, metaData);
}
@Override
protected SortedNumericDocValues getValues(Numeric valuesSource, LeafReaderContext ctx) throws IOException {
return FieldData.toSortableLongBits(valuesSource.doubleValues(ctx));
}
@Override
public DoubleTerms buildAggregation(long owningBucketOrdinal) throws IOException {
final LongTerms terms = (LongTerms) super.buildAggregation(owningBucketOrdinal);
return convertToDouble(terms);
}
@Override
public DoubleTerms buildEmptyAggregation() {
final LongTerms terms = (LongTerms) super.buildEmptyAggregation();
return convertToDouble(terms);
}
private static DoubleTerms convertToDouble(LongTerms terms) {
List buckets = terms.buckets.stream().map(DoubleTermsAggregator::convertToDouble).collect(Collectors.toList());
return new DoubleTerms(terms.getName(), terms.order, terms.requiredSize, terms.minDocCount, terms.pipelineAggregators(),
terms.getMetaData(), terms.format, terms.shardSize, terms.showTermDocCountError, terms.otherDocCount, buckets,
terms.docCountError);
}
private static DoubleTerms.Bucket convertToDouble(LongTerms.Bucket bucket) {
double value = NumericUtils.sortableLongToDouble(bucket.term);
return new DoubleTerms.Bucket(value, bucket.docCount, bucket.aggregations, bucket.showDocCountError, bucket.docCountError,
bucket.format);
}
}