org.elasticsearch.search.aggregations.metrics.HDRPercentilesAggregator Maven / Gradle / Ivy

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/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */
package org.elasticsearch.search.aggregations.metrics;

import org.HdrHistogram.DoubleHistogram;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.ValuesSource;

import java.io.IOException;
import java.util.Map;

class HDRPercentilesAggregator extends AbstractHDRPercentilesAggregator {

    HDRPercentilesAggregator(
        String name,
        ValuesSource valuesSource,
        AggregationContext context,
        Aggregator parent,
        double[] percents,
        int numberOfSignificantValueDigits,
        boolean keyed,
        DocValueFormat formatter,
        Map metadata
    ) throws IOException {
        super(name, valuesSource, context, parent, percents, numberOfSignificantValueDigits, keyed, formatter, metadata);
    }

    @Override
    public InternalAggregation buildAggregation(long owningBucketOrdinal) {
        DoubleHistogram state = getState(owningBucketOrdinal);
        if (state == null) {
            return buildEmptyAggregation();
        } else {
            return new InternalHDRPercentiles(name, keys, state, keyed, format, 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, format, metadata());
    }
}