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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.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.ScoreMode;
import org.elasticsearch.common.util.ArrayUtils;
import org.elasticsearch.common.util.BigArrays;
import org.elasticsearch.common.util.ObjectArray;
import org.elasticsearch.core.Releasables;
import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.LeafBucketCollector;
import org.elasticsearch.search.aggregations.LeafBucketCollectorBase;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import java.io.IOException;
import java.util.Map;
abstract class AbstractTDigestPercentilesAggregator extends NumericMetricsAggregator.MultiValue {
private static int indexOfKey(double[] keys, double key) {
return ArrayUtils.binarySearch(keys, key, 0.001);
}
protected final double[] keys;
protected final ValuesSource valuesSource;
protected final DocValueFormat formatter;
protected ObjectArray states;
protected final double compression;
protected final boolean keyed;
AbstractTDigestPercentilesAggregator(
String name,
ValuesSource valuesSource,
AggregationContext context,
Aggregator parent,
double[] keys,
double compression,
boolean keyed,
DocValueFormat formatter,
Map metadata
) throws IOException {
super(name, context, parent, metadata);
this.valuesSource = valuesSource;
this.keyed = keyed;
this.formatter = formatter;
this.states = context.bigArrays().newObjectArray(1);
this.keys = keys;
this.compression = compression;
}
@Override
public ScoreMode scoreMode() {
return valuesSource != null && valuesSource.needsScores() ? ScoreMode.COMPLETE : ScoreMode.COMPLETE_NO_SCORES;
}
@Override
public LeafBucketCollector getLeafCollector(LeafReaderContext ctx, final LeafBucketCollector sub) throws IOException {
if (valuesSource == null) {
return LeafBucketCollector.NO_OP_COLLECTOR;
}
final SortedNumericDoubleValues values = ((ValuesSource.Numeric) valuesSource).doubleValues(ctx);
return new LeafBucketCollectorBase(sub, values) {
@Override
public void collect(int doc, long bucket) throws IOException {
TDigestState state = getExistingOrNewHistogram(bigArrays(), bucket);
if (values.advanceExact(doc)) {
final int valueCount = values.docValueCount();
for (int i = 0; i < valueCount; i++) {
state.add(values.nextValue());
}
}
}
};
}
private TDigestState getExistingOrNewHistogram(final BigArrays bigArrays, long bucket) {
states = bigArrays.grow(states, bucket + 1);
TDigestState state = states.get(bucket);
if (state == null) {
state = new TDigestState(compression);
states.set(bucket, state);
}
return state;
}
@Override
public boolean hasMetric(String name) {
return indexOfKey(keys, Double.parseDouble(name)) >= 0;
}
protected TDigestState getState(long bucketOrd) {
if (bucketOrd >= states.size()) {
return null;
}
final TDigestState state = states.get(bucketOrd);
return state;
}
@Override
protected void doClose() {
Releasables.close(states);
}
}