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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.search.aggregations.bucket.geogrid;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.NonCollectingAggregator;
import org.elasticsearch.search.aggregations.bucket.geogrid.GeoGridAggregationBuilder.CellIdSource;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import org.elasticsearch.search.aggregations.support.ValuesSource.GeoPoint;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class GeoHashGridAggregatorFactory extends ValuesSourceAggregatorFactory<ValuesSource.GeoPoint, GeoHashGridAggregatorFactory> {
private final int precision;
private final int requiredSize;
private final int shardSize;
GeoHashGridAggregatorFactory(String name, ValuesSourceConfig<GeoPoint> config, int precision, int requiredSize,
int shardSize, SearchContext context, AggregatorFactory<?> parent, AggregatorFactories.Builder subFactoriesBuilder,
Map<String, Object> metaData) throws IOException {
super(name, config, context, parent, subFactoriesBuilder, metaData);
this.precision = precision;
this.requiredSize = requiredSize;
this.shardSize = shardSize;
}
@Override
protected Aggregator createUnmapped(Aggregator parent, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData)
throws IOException {
final InternalAggregation aggregation = new InternalGeoHashGrid(name, requiredSize,
Collections.<InternalGeoHashGrid.Bucket> emptyList(), pipelineAggregators, metaData);
return new NonCollectingAggregator(name, context, parent, pipelineAggregators, metaData) {
@Override
public InternalAggregation buildEmptyAggregation() {
return aggregation;
}
};
}
@Override
protected Aggregator doCreateInternal(final ValuesSource.GeoPoint valuesSource, Aggregator parent, boolean collectsFromSingleBucket,
List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) throws IOException {
if (collectsFromSingleBucket == false) {
return asMultiBucketAggregator(this, context, parent);
}
CellIdSource cellIdSource = new CellIdSource(valuesSource, precision);
return new GeoHashGridAggregator(name, factories, cellIdSource, requiredSize, shardSize, context, parent,
pipelineAggregators, metaData);
}
}
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