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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.common.io.stream.StreamInput;
import org.elasticsearch.search.DocValueFormat;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
public class InternalHDRPercentiles extends AbstractInternalHDRPercentiles implements Percentiles {
public static final String NAME = "hdr_percentiles";
public InternalHDRPercentiles(
String name,
double[] percents,
DoubleHistogram state,
boolean keyed,
DocValueFormat formatter,
Map metadata
) {
super(name, percents, state, keyed, formatter, metadata);
}
/**
* Read from a stream.
*/
public InternalHDRPercentiles(StreamInput in) throws IOException {
super(in);
}
@Override
public String getWriteableName() {
return NAME;
}
@Override
public Iterator iterator() {
return new Iter(keys, state);
}
@Override
public double percentile(double percent) {
if (state.getTotalCount() == 0) {
return Double.NaN;
}
return state.getValueAtPercentile(percent);
}
@Override
public String percentileAsString(double percent) {
return valueAsString(String.valueOf(percent));
}
@Override
public double value(double key) {
return percentile(key);
}
@Override
protected AbstractInternalHDRPercentiles createReduced(
String name,
double[] keys,
DoubleHistogram merged,
boolean keyed,
Map metadata
) {
return new InternalHDRPercentiles(name, keys, merged, keyed, format, metadata);
}
public static class Iter implements Iterator {
private final double[] percents;
private final DoubleHistogram state;
private int i;
public Iter(double[] percents, DoubleHistogram state) {
this.percents = percents;
this.state = state;
i = 0;
}
@Override
public boolean hasNext() {
return i < percents.length;
}
@Override
public Percentile next() {
double percent = percents[i];
double value = (state.getTotalCount() == 0) ? Double.NaN : state.getValueAtPercentile(percent);
final Percentile next = new Percentile(percent, value);
++i;
return next;
}
@Override
public final void remove() {
throw new UnsupportedOperationException();
}
}
}