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* 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.
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package org.elasticsearch.search.aggregations.metrics.percentiles.hdr;
import org.HdrHistogram.DoubleHistogram;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.metrics.percentiles.tdigest.InternalTDigestPercentiles;
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 org.elasticsearch.search.aggregations.support.ValuesSourceAggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.format.ValueFormatter;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
*
*/
public class HDRPercentilesAggregator extends AbstractHDRPercentilesAggregator {
public HDRPercentilesAggregator(String name, Numeric valuesSource, AggregationContext context, Aggregator parent, double[] percents,
int numberOfSignificantValueDigits, boolean keyed, ValueFormatter formatter,
List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) throws IOException {
super(name, valuesSource, context, parent, percents, numberOfSignificantValueDigits, keyed, formatter,
pipelineAggregators, metaData);
}
@Override
public InternalAggregation buildAggregation(long owningBucketOrdinal) {
DoubleHistogram state = getState(owningBucketOrdinal);
if (state == null) {
return buildEmptyAggregation();
} else {
return new InternalHDRPercentiles(name, keys, state, keyed, formatter, pipelineAggregators(), metaData());
}
}
@Override
public double metric(String name, long bucketOrd) {
DoubleHistogram state = getState(bucketOrd);
if (state == null) {
return Double.NaN;
} else {
return state.getValueAtPercentile(Double.parseDouble(name));
}
}
@Override
public InternalAggregation buildEmptyAggregation() {
DoubleHistogram state;
state = new DoubleHistogram(numberOfSignificantValueDigits);
state.setAutoResize(true);
return new InternalHDRPercentiles(name, keys, state,
keyed,
formatter, pipelineAggregators(), metaData());
}
public static class Factory extends ValuesSourceAggregatorFactory.LeafOnly<ValuesSource.Numeric> {
private final double[] percents;
private final int numberOfSignificantValueDigits;
private final boolean keyed;
public Factory(String name, ValuesSourceConfig<ValuesSource.Numeric> valuesSourceConfig, double[] percents,
int numberOfSignificantValueDigits, boolean keyed) {
super(name, InternalTDigestPercentiles.TYPE.name(), valuesSourceConfig);
this.percents = percents;
this.numberOfSignificantValueDigits = numberOfSignificantValueDigits;
this.keyed = keyed;
}
@Override
protected Aggregator createUnmapped(AggregationContext aggregationContext, Aggregator parent,
List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) throws IOException {
return new HDRPercentilesAggregator(name, null, aggregationContext, parent, percents, numberOfSignificantValueDigits, keyed,
config.formatter(), pipelineAggregators, metaData);
}
@Override
protected Aggregator doCreateInternal(ValuesSource.Numeric valuesSource, AggregationContext aggregationContext, Aggregator parent,
boolean collectsFromSingleBucket, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData)
throws IOException {
return new HDRPercentilesAggregator(name, valuesSource, aggregationContext, parent, percents, numberOfSignificantValueDigits,
keyed, config.formatter(), pipelineAggregators, metaData);
}
}
}