org.elasticsearch.search.aggregations.metrics.tophits.TopHitsAggregatorFactory Maven / Gradle / Ivy

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 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
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 *
 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.search.aggregations.metrics.tophits;

import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.InternalAggregation.Type;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.fetch.StoredFieldsContext;
import org.elasticsearch.search.fetch.subphase.DocValueFieldsContext;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import org.elasticsearch.search.fetch.subphase.ScriptFieldsContext;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.internal.SubSearchContext;
import org.elasticsearch.search.sort.SortAndFormats;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Optional;

public class TopHitsAggregatorFactory extends AggregatorFactory {

    private final int from;
    private final int size;
    private final boolean explain;
    private final boolean version;
    private final boolean trackScores;
    private final Optional sort;
    private final HighlightBuilder highlightBuilder;
    private final StoredFieldsContext storedFieldsContext;
    private final List docValueFields;
    private final List scriptFields;
    private final FetchSourceContext fetchSourceContext;

    public TopHitsAggregatorFactory(String name, Type type, int from, int size, boolean explain, boolean version, boolean trackScores,
            Optional sort, HighlightBuilder highlightBuilder, StoredFieldsContext storedFieldsContext,
            List docValueFields, List scriptFields, FetchSourceContext fetchSourceContext,
            AggregationContext context, AggregatorFactory parent, AggregatorFactories.Builder subFactories, Map metaData)
            throws IOException {
        super(name, type, context, parent, subFactories, metaData);
        this.from = from;
        this.size = size;
        this.explain = explain;
        this.version = version;
        this.trackScores = trackScores;
        this.sort = sort;
        this.highlightBuilder = highlightBuilder;
        this.storedFieldsContext = storedFieldsContext;
        this.docValueFields = docValueFields;
        this.scriptFields = scriptFields;
        this.fetchSourceContext = fetchSourceContext;
    }

    @Override
    public Aggregator createInternal(Aggregator parent, boolean collectsFromSingleBucket, List pipelineAggregators,
            Map metaData) throws IOException {
        SubSearchContext subSearchContext = new SubSearchContext(context.searchContext());
        subSearchContext.parsedQuery(context.searchContext().parsedQuery());
        subSearchContext.explain(explain);
        subSearchContext.version(version);
        subSearchContext.trackScores(trackScores);
        subSearchContext.from(from);
        subSearchContext.size(size);
        if (sort.isPresent()) {
            subSearchContext.sort(sort.get());
        }
        if (storedFieldsContext != null) {
            subSearchContext.storedFieldsContext(storedFieldsContext);
        }
        if (docValueFields != null) {
            subSearchContext.docValueFieldsContext(new DocValueFieldsContext(docValueFields));
        }
        for (ScriptFieldsContext.ScriptField field : scriptFields) {
            subSearchContext.scriptFields().add(field);
            }
        if (fetchSourceContext != null) {
            subSearchContext.fetchSourceContext(fetchSourceContext);
        }
        if (highlightBuilder != null) {
            subSearchContext.highlight(highlightBuilder.build(context.searchContext().getQueryShardContext()));
        }
        return new TopHitsAggregator(context.searchContext().fetchPhase(), subSearchContext, name, context, parent,
                pipelineAggregators, metaData);
    }

}