org.elasticsearch.search.aggregations.bucket.composite.PointsSortedDocsProducer 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.bucket.composite;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.PointValues;
import org.apache.lucene.search.CollectionTerminatedException;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Query;
import org.apache.lucene.util.DocIdSetBuilder;
import org.apache.lucene.util.FutureArrays;
import java.io.IOException;
import java.util.function.ToLongFunction;
/**
* A {@link SortedDocsProducer} that can sort documents based on numerics indexed in the provided field.
*/
class PointsSortedDocsProducer extends SortedDocsProducer {
private final ToLongFunction bucketFunction;
private final byte[] lowerPointQuery;
private final byte[] upperPointQuery;
PointsSortedDocsProducer(String field, ToLongFunction bucketFunction, byte[] lowerPointQuery, byte[] upperPointQuery) {
super(field);
this.bucketFunction = bucketFunction;
this.lowerPointQuery = lowerPointQuery;
this.upperPointQuery = upperPointQuery;
}
@Override
DocIdSet processLeaf(Query query, CompositeValuesCollectorQueue queue,
LeafReaderContext context, boolean fillDocIdSet) throws IOException {
final PointValues values = context.reader().getPointValues(field);
if (values == null) {
// no value for the field
return DocIdSet.EMPTY;
}
long lowerBucket = Long.MIN_VALUE;
Comparable lowerValue = queue.getLowerValueLeadSource();
if (lowerValue != null) {
if (lowerValue.getClass() != Long.class) {
throw new IllegalStateException("expected Long, got " + lowerValue.getClass());
}
lowerBucket = (Long) lowerValue;
}
long upperBucket = Long.MAX_VALUE;
Comparable upperValue = queue.getUpperValueLeadSource();
if (upperValue != null) {
if (upperValue.getClass() != Long.class) {
throw new IllegalStateException("expected Long, got " + upperValue.getClass());
}
upperBucket = (Long) upperValue;
}
DocIdSetBuilder builder = fillDocIdSet ? new DocIdSetBuilder(context.reader().maxDoc(), values, field) : null;
Visitor visitor = new Visitor(context, queue, builder, values.getBytesPerDimension(), lowerBucket, upperBucket);
try {
values.intersect(visitor);
visitor.flush();
} catch (CollectionTerminatedException exc) {}
return fillDocIdSet ? builder.build() : DocIdSet.EMPTY;
}
private class Visitor implements PointValues.IntersectVisitor {
final LeafReaderContext context;
final CompositeValuesCollectorQueue queue;
final DocIdSetBuilder builder;
final int maxDoc;
final int bytesPerDim;
final long lowerBucket;
final long upperBucket;
DocIdSetBuilder bucketDocsBuilder;
DocIdSetBuilder.BulkAdder adder;
int remaining;
long lastBucket;
boolean first = true;
Visitor(LeafReaderContext context, CompositeValuesCollectorQueue queue, DocIdSetBuilder builder,
int bytesPerDim, long lowerBucket, long upperBucket) {
this.context = context;
this.maxDoc = context.reader().maxDoc();
this.queue = queue;
this.builder = builder;
this.lowerBucket = lowerBucket;
this.upperBucket = upperBucket;
this.bucketDocsBuilder = new DocIdSetBuilder(maxDoc);
this.bytesPerDim = bytesPerDim;
}
@Override
public void grow(int count) {
remaining = count;
adder = bucketDocsBuilder.grow(count);
}
@Override
public void visit(int docID) throws IOException {
throw new IllegalStateException("should never be called");
}
@Override
public void visit(int docID, byte[] packedValue) throws IOException {
if (compare(packedValue, packedValue) != PointValues.Relation.CELL_CROSSES_QUERY) {
remaining --;
return;
}
long bucket = bucketFunction.applyAsLong(packedValue);
if (first == false && bucket != lastBucket) {
final DocIdSet docIdSet = bucketDocsBuilder.build();
if (processBucket(queue, context, docIdSet.iterator(), lastBucket, builder) &&
// lower bucket is inclusive
lowerBucket != lastBucket) {
// this bucket does not have any competitive composite buckets,
// we can early terminate the collection because the remaining buckets are guaranteed
// to be greater than this bucket.
throw new CollectionTerminatedException();
}
bucketDocsBuilder = new DocIdSetBuilder(maxDoc);
assert remaining > 0;
adder = bucketDocsBuilder.grow(remaining);
}
lastBucket = bucket;
first = false;
adder.add(docID);
remaining --;
}
@Override
public PointValues.Relation compare(byte[] minPackedValue, byte[] maxPackedValue) {
if ((upperPointQuery != null &&
FutureArrays.compareUnsigned(minPackedValue, 0, bytesPerDim, upperPointQuery, 0, bytesPerDim) > 0) ||
(lowerPointQuery != null &&
FutureArrays.compareUnsigned(maxPackedValue, 0, bytesPerDim, lowerPointQuery, 0, bytesPerDim) < 0)) {
// does not match the query
return PointValues.Relation.CELL_OUTSIDE_QUERY;
}
// check the current bounds
if (lowerBucket != Long.MIN_VALUE) {
long maxBucket = bucketFunction.applyAsLong(maxPackedValue);
if (maxBucket < lowerBucket) {
return PointValues.Relation.CELL_OUTSIDE_QUERY;
}
}
if (upperBucket != Long.MAX_VALUE) {
long minBucket = bucketFunction.applyAsLong(minPackedValue);
if (minBucket > upperBucket) {
return PointValues.Relation.CELL_OUTSIDE_QUERY;
}
}
return PointValues.Relation.CELL_CROSSES_QUERY;
}
public void flush() throws IOException {
if (first == false) {
final DocIdSet docIdSet = bucketDocsBuilder.build();
processBucket(queue, context, docIdSet.iterator(), lastBucket, builder);
bucketDocsBuilder = null;
}
}
}
}