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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.apache.lucene.queries;
import org.apache.lucene.index.BinaryDocValues;
import org.apache.lucene.index.DocValues;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.ConstantScoreScorer;
import org.apache.lucene.search.ConstantScoreWeight;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreMode;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.TwoPhaseIterator;
import org.apache.lucene.search.Weight;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.io.stream.ByteArrayStreamInput;
import org.elasticsearch.index.mapper.RangeType;
import java.io.IOException;
import java.util.Objects;
public final class BinaryDocValuesRangeQuery extends Query {
private final String fieldName;
private final QueryType queryType;
private final RangeType.LengthType lengthType;
private final BytesRef from;
private final BytesRef to;
private final Object originalFrom;
private final Object originalTo;
public BinaryDocValuesRangeQuery(
String fieldName,
QueryType queryType,
RangeType.LengthType lengthType,
BytesRef from,
BytesRef to,
Object originalFrom,
Object originalTo
) {
this.fieldName = fieldName;
this.queryType = queryType;
this.lengthType = lengthType;
this.from = from;
this.to = to;
this.originalFrom = originalFrom;
this.originalTo = originalTo;
}
@Override
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException {
return new ConstantScoreWeight(this, boost) {
@Override
public Scorer scorer(LeafReaderContext context) throws IOException {
final BinaryDocValues values = context.reader().getBinaryDocValues(fieldName);
if (values == null) {
return null;
}
final TwoPhaseIterator iterator = new TwoPhaseIterator(values) {
ByteArrayStreamInput in = new ByteArrayStreamInput();
BytesRef otherFrom = new BytesRef();
BytesRef otherTo = new BytesRef();
@Override
public boolean matches() throws IOException {
BytesRef encodedRanges = values.binaryValue();
in.reset(encodedRanges.bytes, encodedRanges.offset, encodedRanges.length);
int numRanges = in.readVInt();
final byte[] bytes = encodedRanges.bytes;
otherFrom.bytes = bytes;
otherTo.bytes = bytes;
int offset = in.getPosition();
for (int i = 0; i < numRanges; i++) {
int length = lengthType.readLength(bytes, offset);
otherFrom.offset = offset;
otherFrom.length = length;
offset += length;
length = lengthType.readLength(bytes, offset);
otherTo.offset = offset;
otherTo.length = length;
offset += length;
if (queryType.matches(from, to, otherFrom, otherTo)) {
return true;
}
}
assert offset == encodedRanges.offset + encodedRanges.length;
return false;
}
@Override
public float matchCost() {
return 4; // at most 4 comparisons
}
};
return new ConstantScoreScorer(this, score(), scoreMode, iterator);
}
@Override
public boolean isCacheable(LeafReaderContext ctx) {
return DocValues.isCacheable(ctx, fieldName);
}
};
}
@Override
public String toString(String field) {
return "BinaryDocValuesRangeQuery(fieldName=" + field + ",from=" + originalFrom + ",to=" + originalTo + ")";
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (sameClassAs(o) == false) return false;
BinaryDocValuesRangeQuery that = (BinaryDocValuesRangeQuery) o;
return Objects.equals(fieldName, that.fieldName)
&& queryType == that.queryType
&& lengthType == that.lengthType
&& Objects.equals(from, that.from)
&& Objects.equals(to, that.to);
}
@Override
public int hashCode() {
return Objects.hash(classHash(), fieldName, queryType, lengthType, from, to);
}
public enum QueryType {
INTERSECTS {
@Override
boolean matches(BytesRef from, BytesRef to, BytesRef otherFrom, BytesRef otherTo) {
/*
* part of the other range must touch this range
* this: |---------------|
* other: |------|
*/
return from.compareTo(otherTo) <= 0 && to.compareTo(otherFrom) >= 0;
}
},
WITHIN {
@Override
boolean matches(BytesRef from, BytesRef to, BytesRef otherFrom, BytesRef otherTo) {
/*
* other range must entirely lie within this range
* this: |---------------|
* other: |------|
*/
return from.compareTo(otherFrom) <= 0 && to.compareTo(otherTo) >= 0;
}
},
CONTAINS {
@Override
boolean matches(BytesRef from, BytesRef to, BytesRef otherFrom, BytesRef otherTo) {
/*
* this and other range must overlap
* this: |------|
* other: |---------------|
*/
return from.compareTo(otherFrom) >= 0 && to.compareTo(otherTo) <= 0;
}
},
CROSSES {
@Override
boolean matches(BytesRef from, BytesRef to, BytesRef otherFrom, BytesRef otherTo) {
// does not disjoint AND not within:
return (from.compareTo(otherTo) > 0 || to.compareTo(otherFrom) < 0) == false
&& (from.compareTo(otherFrom) <= 0 && to.compareTo(otherTo) >= 0) == false;
}
};
abstract boolean matches(BytesRef from, BytesRef to, BytesRef otherFrom, BytesRef otherTo);
}
}