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/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* 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.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.search.aggregations.bucket.nested;
import org.opensearch.index.mapper.ObjectMapper;
import org.opensearch.index.query.QueryShardContext;
import org.opensearch.search.aggregations.Aggregator;
import org.opensearch.search.aggregations.AggregatorFactories;
import org.opensearch.search.aggregations.AggregatorFactory;
import org.opensearch.search.aggregations.CardinalityUpperBound;
import org.opensearch.search.aggregations.InternalAggregation;
import org.opensearch.search.aggregations.NonCollectingAggregator;
import org.opensearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.Map;
public class ReverseNestedAggregatorFactory extends AggregatorFactory {
private final boolean unmapped;
private final ObjectMapper parentObjectMapper;
public ReverseNestedAggregatorFactory(
String name,
boolean unmapped,
ObjectMapper parentObjectMapper,
QueryShardContext queryShardContext,
AggregatorFactory parent,
AggregatorFactories.Builder subFactories,
Map metadata
) throws IOException {
super(name, queryShardContext, parent, subFactories, metadata);
this.unmapped = unmapped;
this.parentObjectMapper = parentObjectMapper;
}
@Override
public Aggregator createInternal(
SearchContext searchContext,
Aggregator parent,
CardinalityUpperBound cardinality,
Map metadata
) throws IOException {
if (unmapped) {
return new Unmapped(name, searchContext, parent, factories, metadata);
} else {
return new ReverseNestedAggregator(name, factories, parentObjectMapper, searchContext, parent, cardinality, metadata);
}
}
private static final class Unmapped extends NonCollectingAggregator {
Unmapped(String name, SearchContext context, Aggregator parent, AggregatorFactories factories, Map metadata)
throws IOException {
super(name, context, parent, factories, metadata);
}
@Override
public InternalAggregation buildEmptyAggregation() {
return new InternalReverseNested(name, 0, buildEmptySubAggregations(), metadata());
}
}
}