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

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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.metrics;

import org.elasticsearch.index.query.QueryShardContext;
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.fetch.StoredFieldsContext;
import org.elasticsearch.search.fetch.subphase.FetchDocValuesContext;
import org.elasticsearch.search.fetch.subphase.FetchDocValuesContext.FieldAndFormat;
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.SearchContext;
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;

class TopHitsAggregatorFactory extends AggregatorFactory {

    private final int from;
    private final int size;
    private final boolean explain;
    private final boolean version;
    private final boolean seqNoAndPrimaryTerm;
    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;

    TopHitsAggregatorFactory(String name,
                                int from,
                                int size,
                                boolean explain,
                                boolean version,
                                boolean seqNoAndPrimaryTerm,
                                boolean trackScores,
                                Optional sort,
                                HighlightBuilder highlightBuilder,
                                StoredFieldsContext storedFieldsContext,
                                List docValueFields,
                                List scriptFields,
                                FetchSourceContext fetchSourceContext,
                                QueryShardContext queryShardContext,
                                AggregatorFactory parent,
                                AggregatorFactories.Builder subFactories,
                                Map metaData) throws IOException {
        super(name, queryShardContext, parent, subFactories, metaData);
        this.from = from;
        this.size = size;
        this.explain = explain;
        this.version = version;
        this.seqNoAndPrimaryTerm = seqNoAndPrimaryTerm;
        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(SearchContext searchContext,
                                        Aggregator parent,
                                        boolean collectsFromSingleBucket,
                                        List pipelineAggregators,
                                        Map metaData) throws IOException {
        SubSearchContext subSearchContext = new SubSearchContext(searchContext);
        subSearchContext.parsedQuery(searchContext.parsedQuery());
        subSearchContext.explain(explain);
        subSearchContext.version(version);
        subSearchContext.seqNoAndPrimaryTerm(seqNoAndPrimaryTerm);
        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.docValuesContext(new FetchDocValuesContext(docValueFields));
        }
        for (ScriptFieldsContext.ScriptField field : scriptFields) {
            subSearchContext.scriptFields().add(field);
            }
        if (fetchSourceContext != null) {
            subSearchContext.fetchSourceContext(fetchSourceContext);
        }
        if (highlightBuilder != null) {
            subSearchContext.highlight(highlightBuilder.build(searchContext.getQueryShardContext()));
        }
        return new TopHitsAggregator(searchContext.fetchPhase(), subSearchContext, name, searchContext, parent,
                pipelineAggregators, metaData);
    }

}