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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.missing;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.util.Bits;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.InternalAggregation;
import org.elasticsearch.search.aggregations.LeafBucketCollector;
import org.elasticsearch.search.aggregations.LeafBucketCollectorBase;
import org.elasticsearch.search.aggregations.bucket.SingleBucketAggregator;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
*
*/
public class MissingAggregator extends SingleBucketAggregator {
private final ValuesSource valuesSource;
public MissingAggregator(String name, AggregatorFactories factories, ValuesSource valuesSource,
AggregationContext aggregationContext, Aggregator parent, List<PipelineAggregator> pipelineAggregators,
Map<String, Object> metaData) throws IOException {
super(name, factories, aggregationContext, parent, pipelineAggregators, metaData);
this.valuesSource = valuesSource;
}
@Override
public LeafBucketCollector getLeafCollector(LeafReaderContext ctx,
final LeafBucketCollector sub) throws IOException {
final Bits docsWithValue;
if (valuesSource != null) {
docsWithValue = valuesSource.docsWithValue(ctx);
} else {
docsWithValue = new Bits.MatchNoBits(ctx.reader().maxDoc());
}
return new LeafBucketCollectorBase(sub, docsWithValue) {
@Override
public void collect(int doc, long bucket) throws IOException {
if (docsWithValue != null && !docsWithValue.get(doc)) {
collectBucket(sub, doc, bucket);
}
}
};
}
@Override
public InternalAggregation buildAggregation(long owningBucketOrdinal) throws IOException {
return new InternalMissing(name, bucketDocCount(owningBucketOrdinal), bucketAggregations(owningBucketOrdinal), pipelineAggregators(),
metaData());
}
@Override
public InternalAggregation buildEmptyAggregation() {
return new InternalMissing(name, 0, buildEmptySubAggregations(), pipelineAggregators(), metaData());
}
public static class Factory extends ValuesSourceAggregatorFactory<ValuesSource> {
public Factory(String name, ValuesSourceConfig valueSourceConfig) {
super(name, InternalMissing.TYPE.name(), valueSourceConfig);
}
@Override
protected MissingAggregator createUnmapped(AggregationContext aggregationContext, Aggregator parent, List<PipelineAggregator> pipelineAggregators,
Map<String, Object> metaData) throws IOException {
return new MissingAggregator(name, factories, null, aggregationContext, parent, pipelineAggregators, metaData);
}
@Override
protected MissingAggregator doCreateInternal(ValuesSource valuesSource, AggregationContext aggregationContext, Aggregator parent,
boolean collectsFromSingleBucket, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) throws IOException {
return new MissingAggregator(name, factories, valuesSource, aggregationContext, parent, pipelineAggregators, metaData);
}
}
}
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