AvgAggregatorFactory.java example

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package org.elasticsearch.search.aggregations.metrics.avg;

import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import org.elasticsearch.search.aggregations.support.ValuesSource.Numeric;
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.List;
import java.util.Map;

public class AvgAggregatorFactory extends ValuesSourceAggregatorFactory<ValuesSource.Numeric, AvgAggregatorFactory> {

    public AvgAggregatorFactory(String name, ValuesSourceConfig<Numeric> config, SearchContext context,
            AggregatorFactory<?> parent, AggregatorFactories.Builder subFactoriesBuilder, Map<String, Object> metaData) throws IOException {
        super(name, config, context, parent, subFactoriesBuilder, metaData);
    }

    @Override
    protected Aggregator createUnmapped(Aggregator parent, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData)
            throws IOException {
        return new AvgAggregator(name, null, config.format(), context, parent, pipelineAggregators, metaData);
    }

    @Override
    protected Aggregator doCreateInternal(ValuesSource.Numeric valuesSource, Aggregator parent, boolean collectsFromSingleBucket,
            List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) throws IOException {
        return new AvgAggregator(name, valuesSource, config.format(), context, parent, pipelineAggregators, metaData);
    }
}