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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.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.AggregationReduceContext;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.support.SamplingContext;
import org.elasticsearch.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Objects;
abstract class AbstractInternalTDigestPercentiles extends InternalNumericMetricsAggregation.MultiValue {
protected final double[] keys;
protected final TDigestState state;
final boolean keyed;
AbstractInternalTDigestPercentiles(
String name,
double[] keys,
TDigestState state,
boolean keyed,
DocValueFormat formatter,
Map metadata
) {
super(name, formatter, metadata);
this.keys = keys;
this.state = state;
this.keyed = keyed;
}
/**
* Read from a stream.
*/
protected AbstractInternalTDigestPercentiles(StreamInput in) throws IOException {
super(in);
keys = in.readDoubleArray();
state = TDigestState.read(in);
keyed = in.readBoolean();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeNamedWriteable(format);
out.writeDoubleArray(keys);
TDigestState.write(state, out);
out.writeBoolean(keyed);
}
@Override
public double value(String name) {
return value(Double.parseDouble(name));
}
@Override
public Iterable valueNames() {
return Arrays.stream(getKeys()).mapToObj(d -> String.valueOf(d)).toList();
}
public abstract double value(double key);
public DocValueFormat formatter() {
return format;
}
public long getEstimatedMemoryFootprint() {
return state.byteSize();
}
/**
* Return the internal {@link TDigestState} sketch for this metric.
*/
public TDigestState getState() {
return state;
}
/**
* Return the keys (percentiles) requested.
*/
public double[] getKeys() {
return keys;
}
/**
* Should the output be keyed.
*/
public boolean keyed() {
return keyed;
}
@Override
public AbstractInternalTDigestPercentiles reduce(List aggregations, AggregationReduceContext reduceContext) {
TDigestState merged = null;
for (InternalAggregation aggregation : aggregations) {
final AbstractInternalTDigestPercentiles percentiles = (AbstractInternalTDigestPercentiles) aggregation;
if (merged == null) {
merged = new TDigestState(percentiles.state.compression());
}
merged.add(percentiles.state);
}
return createReduced(getName(), keys, merged, keyed, getMetadata());
}
@Override
public InternalAggregation finalizeSampling(SamplingContext samplingContext) {
return this;
}
protected abstract AbstractInternalTDigestPercentiles createReduced(
String name,
double[] keys,
TDigestState merged,
boolean keyed,
Map metadata
);
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
if (keyed) {
builder.startObject(CommonFields.VALUES.getPreferredName());
for (int i = 0; i < keys.length; ++i) {
String key = String.valueOf(keys[i]);
double value = value(keys[i]);
builder.field(key, state.size() == 0 ? null : value);
if (format != DocValueFormat.RAW && state.size() > 0) {
builder.field(key + "_as_string", format.format(value).toString());
}
}
builder.endObject();
} else {
builder.startArray(CommonFields.VALUES.getPreferredName());
for (int i = 0; i < keys.length; i++) {
double value = value(keys[i]);
builder.startObject();
builder.field(CommonFields.KEY.getPreferredName(), keys[i]);
builder.field(CommonFields.VALUE.getPreferredName(), state.size() == 0 ? null : value);
if (format != DocValueFormat.RAW && state.size() > 0) {
builder.field(CommonFields.VALUE_AS_STRING.getPreferredName(), format.format(value).toString());
}
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;
AbstractInternalTDigestPercentiles that = (AbstractInternalTDigestPercentiles) obj;
return keyed == that.keyed && Arrays.equals(keys, that.keys) && Objects.equals(state, that.state);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), keyed, Arrays.hashCode(keys), state);
}
}