org.elasticsearch.search.aggregations.bucket.histogram.VariableWidthHistogramAggregatorFactory 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.bucket.histogram;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.CardinalityUpperBound;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.CoreValuesSourceType;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.ValuesSourceRegistry;
import java.io.IOException;
import java.util.Map;
public class VariableWidthHistogramAggregatorFactory extends ValuesSourceAggregatorFactory {
public static void registerAggregators(ValuesSourceRegistry.Builder builder) {
builder.register(
VariableWidthHistogramAggregationBuilder.REGISTRY_KEY,
CoreValuesSourceType.NUMERIC,
VariableWidthHistogramAggregator::new,
true);
}
private final VariableWidthHistogramAggregatorSupplier aggregatorSupplier;
private final int numBuckets;
private final int shardSize;
private final int initialBuffer;
VariableWidthHistogramAggregatorFactory(String name,
ValuesSourceConfig config,
int numBuckets,
int shardSize,
int initialBuffer,
AggregationContext context,
AggregatorFactory parent,
AggregatorFactories.Builder subFactoriesBuilder,
Map metadata,
VariableWidthHistogramAggregatorSupplier aggregatorSupplier) throws IOException{
super(name, config, context, parent, subFactoriesBuilder, metadata);
this.aggregatorSupplier = aggregatorSupplier;
this.numBuckets = numBuckets;
this.shardSize = shardSize;
this.initialBuffer = initialBuffer;
}
@Override
protected Aggregator doCreateInternal(Aggregator parent, CardinalityUpperBound cardinality, Map metadata)
throws IOException {
if (cardinality != CardinalityUpperBound.ONE) {
throw new IllegalArgumentException(
"["
+ VariableWidthHistogramAggregationBuilder.NAME
+ "] cannot be nested inside an aggregation that collects more than a single bucket."
);
}
return aggregatorSupplier
.build(name, factories, numBuckets, shardSize, initialBuffer, config, context, parent, metadata);
}
@Override
protected Aggregator createUnmapped(Aggregator parent, Map metadata) throws IOException {
return new VariableWidthHistogramAggregator(name, factories, numBuckets, shardSize, initialBuffer, config,
context, parent, metadata);
}
}