org.elasticsearch.search.aggregations.bucket.terms.LongTermsAggregator Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.terms;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.SortedNumericDocValues;
import org.elasticsearch.common.lease.Releasables;
import org.elasticsearch.common.util.LongHash;
import org.elasticsearch.search.DocValueFormat;
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.terms.support.BucketPriorityQueue;
import org.elasticsearch.search.aggregations.bucket.terms.support.IncludeExclude;
import org.elasticsearch.search.aggregations.bucket.terms.support.IncludeExclude.LongFilter;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import static java.util.Collections.emptyList;
/**
*
*/
public class LongTermsAggregator extends TermsAggregator {
protected final ValuesSource.Numeric valuesSource;
protected final LongHash bucketOrds;
private boolean showTermDocCountError;
private LongFilter longFilter;
public LongTermsAggregator(String name, AggregatorFactories factories, ValuesSource.Numeric valuesSource, DocValueFormat format,
Terms.Order order, BucketCountThresholds bucketCountThresholds, AggregationContext aggregationContext, Aggregator parent,
SubAggCollectionMode subAggCollectMode, boolean showTermDocCountError, IncludeExclude.LongFilter longFilter,
List pipelineAggregators, Map metaData) throws IOException {
super(name, factories, aggregationContext, parent, bucketCountThresholds, order, format, subAggCollectMode, pipelineAggregators, metaData);
this.valuesSource = valuesSource;
this.showTermDocCountError = showTermDocCountError;
this.longFilter = longFilter;
bucketOrds = new LongHash(1, aggregationContext.bigArrays());
}
@Override
public boolean needsScores() {
return (valuesSource != null && valuesSource.needsScores()) || super.needsScores();
}
protected SortedNumericDocValues getValues(ValuesSource.Numeric valuesSource, LeafReaderContext ctx) throws IOException {
return valuesSource.longValues(ctx);
}
@Override
public LeafBucketCollector getLeafCollector(LeafReaderContext ctx,
final LeafBucketCollector sub) throws IOException {
final SortedNumericDocValues values = getValues(valuesSource, ctx);
return new LeafBucketCollectorBase(sub, values) {
@Override
public void collect(int doc, long owningBucketOrdinal) throws IOException {
assert owningBucketOrdinal == 0;
values.setDocument(doc);
final int valuesCount = values.count();
long previous = Long.MAX_VALUE;
for (int i = 0; i < valuesCount; ++i) {
final long val = values.valueAt(i);
if (previous != val || i == 0) {
if ((longFilter == null) || (longFilter.accept(val))) {
long bucketOrdinal = bucketOrds.add(val);
if (bucketOrdinal < 0) { // already seen
bucketOrdinal = - 1 - bucketOrdinal;
collectExistingBucket(sub, doc, bucketOrdinal);
} else {
collectBucket(sub, doc, bucketOrdinal);
}
}
previous = val;
}
}
}
};
}
@Override
public InternalAggregation buildAggregation(long owningBucketOrdinal) throws IOException {
assert owningBucketOrdinal == 0;
if (bucketCountThresholds.getMinDocCount() == 0 && (order != InternalOrder.COUNT_DESC || bucketOrds.size() < bucketCountThresholds.getRequiredSize())) {
// we need to fill-in the blanks
for (LeafReaderContext ctx : context.searchContext().searcher().getTopReaderContext().leaves()) {
final SortedNumericDocValues values = getValues(valuesSource, ctx);
for (int docId = 0; docId < ctx.reader().maxDoc(); ++docId) {
values.setDocument(docId);
final int valueCount = values.count();
for (int i = 0; i < valueCount; ++i) {
bucketOrds.add(values.valueAt(i));
}
}
}
}
final int size = (int) Math.min(bucketOrds.size(), bucketCountThresholds.getShardSize());
long otherDocCount = 0;
BucketPriorityQueue ordered = new BucketPriorityQueue<>(size, order.comparator(this));
LongTerms.Bucket spare = null;
for (long i = 0; i < bucketOrds.size(); i++) {
if (spare == null) {
spare = new LongTerms.Bucket(0, 0, null, showTermDocCountError, 0, format);
}
spare.term = bucketOrds.get(i);
spare.docCount = bucketDocCount(i);
otherDocCount += spare.docCount;
spare.bucketOrd = i;
if (bucketCountThresholds.getShardMinDocCount() <= spare.docCount) {
spare = (LongTerms.Bucket) ordered.insertWithOverflow(spare);
}
}
// Get the top buckets
final LongTerms.Bucket[] list = new LongTerms.Bucket[ordered.size()];
long survivingBucketOrds[] = new long[ordered.size()];
for (int i = ordered.size() - 1; i >= 0; --i) {
final LongTerms.Bucket bucket = (LongTerms.Bucket) ordered.pop();
survivingBucketOrds[i] = bucket.bucketOrd;
list[i] = bucket;
otherDocCount -= bucket.docCount;
}
runDeferredCollections(survivingBucketOrds);
// Now build the aggs
for (int i = 0; i < list.length; i++) {
list[i].aggregations = bucketAggregations(list[i].bucketOrd);
list[i].docCountError = 0;
}
return new LongTerms(name, order, bucketCountThresholds.getRequiredSize(), bucketCountThresholds.getMinDocCount(),
pipelineAggregators(), metaData(), format, bucketCountThresholds.getShardSize(), showTermDocCountError, otherDocCount,
Arrays.asList(list), 0);
}
@Override
public InternalAggregation buildEmptyAggregation() {
return new LongTerms(name, order, bucketCountThresholds.getRequiredSize(), bucketCountThresholds.getMinDocCount(),
pipelineAggregators(), metaData(), format, bucketCountThresholds.getShardSize(), showTermDocCountError, 0, emptyList(), 0);
}
@Override
public void doClose() {
Releasables.close(bucketOrds);
}
}