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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.pipeline;
import org.elasticsearch.Version;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.metrics.InternalMax;
import org.elasticsearch.search.aggregations.metrics.InternalNumericMetricsAggregation;
import org.elasticsearch.search.aggregations.metrics.Percentile;
import org.elasticsearch.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;
public class InternalPercentilesBucket extends InternalNumericMetricsAggregation.MultiValue implements PercentilesBucket {
private double[] percentiles;
private double[] percents;
private boolean keyed = true;
private final transient Map percentileLookups = new HashMap<>();
InternalPercentilesBucket(
String name,
double[] percents,
double[] percentiles,
boolean keyed,
DocValueFormat formatter,
Map metadata
) {
super(name, metadata);
if ((percentiles.length == percents.length) == false) {
throw new IllegalArgumentException(
"The number of provided percents and percentiles didn't match. percents: "
+ Arrays.toString(percents)
+ ", percentiles: "
+ Arrays.toString(percentiles)
);
}
this.format = formatter;
this.percentiles = percentiles;
this.percents = percents;
this.keyed = keyed;
computeLookup();
}
private void computeLookup() {
for (int i = 0; i < percents.length; i++) {
percentileLookups.put(percents[i], percentiles[i]);
}
}
/**
* Read from a stream.
*/
public InternalPercentilesBucket(StreamInput in) throws IOException {
super(in);
format = in.readNamedWriteable(DocValueFormat.class);
percentiles = in.readDoubleArray();
percents = in.readDoubleArray();
if (in.getVersion().onOrAfter(Version.V_7_0_0)) {
keyed = in.readBoolean();
}
computeLookup();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeNamedWriteable(format);
out.writeDoubleArray(percentiles);
out.writeDoubleArray(percents);
if (out.getVersion().onOrAfter(Version.V_7_0_0)) {
out.writeBoolean(keyed);
}
}
@Override
public String getWriteableName() {
return PercentilesBucketPipelineAggregationBuilder.NAME;
}
@Override
public double percentile(double percent) throws IllegalArgumentException {
Double percentile = percentileLookups.get(percent);
if (percentile == null) {
throw new IllegalArgumentException(
"Percent requested ["
+ String.valueOf(percent)
+ "] was not"
+ " one of the computed percentiles. Available keys are: "
+ Arrays.toString(percents)
);
}
return percentile;
}
@Override
public String percentileAsString(double percent) {
return format.format(percentile(percent)).toString();
}
DocValueFormat formatter() {
return format;
}
@Override
public Iterator iterator() {
return new Iter(percents, percentiles);
}
@Override
public double value(String name) {
return percentile(Double.parseDouble(name));
}
@Override
public Iterable valueNames() {
return Arrays.stream(percents).mapToObj(d -> String.valueOf(d)).collect(Collectors.toList());
}
@Override
public InternalMax reduce(List aggregations, ReduceContext reduceContext) {
throw new UnsupportedOperationException("Not supported");
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
if (keyed) {
builder.startObject("values");
for (double percent : percents) {
double value = percentile(percent);
boolean hasValue = (Double.isInfinite(value) || Double.isNaN(value)) == false;
String key = String.valueOf(percent);
builder.field(key, hasValue ? value : null);
if (hasValue && format != DocValueFormat.RAW) {
builder.field(key + "_as_string", percentileAsString(percent));
}
}
builder.endObject();
} else {
builder.startArray("values");
for (double percent : percents) {
double value = percentile(percent);
boolean hasValue = (Double.isInfinite(value) || Double.isNaN(value)) == false;
builder.startObject();
builder.field("key", percent);
builder.field("value", hasValue ? value : null);
if (hasValue && format != DocValueFormat.RAW) {
builder.field(String.valueOf(percent) + "_as_string", percentileAsString(percent));
}
builder.endObject();
}
builder.endArray();
}
return builder;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null || getClass() != obj.getClass()) return false;
if (super.equals(obj) == false) return false;
InternalPercentilesBucket that = (InternalPercentilesBucket) obj;
return Arrays.equals(percents, that.percents) && Arrays.equals(percentiles, that.percentiles);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), Arrays.hashCode(percents), Arrays.hashCode(percentiles));
}
public static class Iter implements Iterator {
private final double[] percents;
private final double[] percentiles;
private int i;
public Iter(double[] percents, double[] percentiles) {
this.percents = percents;
this.percentiles = percentiles;
i = 0;
}
@Override
public boolean hasNext() {
return i < percents.length;
}
@Override
public Percentile next() {
final Percentile next = new Percentile(percents[i], percentiles[i]);
++i;
return next;
}
@Override
public final void remove() {
throw new UnsupportedOperationException();
}
}
}