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Elasticsearch - Open Source, Distributed, RESTful Search Engine
/*
* 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.index.search.geo;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.ConstantScoreScorer;
import org.apache.lucene.search.ConstantScoreWeight;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.TwoPhaseIterator;
import org.apache.lucene.search.Weight;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.NumericUtils;
import org.elasticsearch.common.geo.GeoDistance;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.unit.DistanceUnit;
import org.elasticsearch.index.fielddata.IndexGeoPointFieldData;
import org.elasticsearch.index.fielddata.MultiGeoPointValues;
import org.elasticsearch.index.mapper.geo.GeoPointFieldMapper;
import org.elasticsearch.index.mapper.geo.GeoPointFieldMapperLegacy;
import java.io.IOException;
/**
*
*/
public class GeoDistanceRangeQuery extends Query {
private final double lat;
private final double lon;
private final double inclusiveLowerPoint; // in meters
private final double inclusiveUpperPoint; // in meters
private final GeoDistance geoDistance;
private final GeoDistance.FixedSourceDistance fixedSourceDistance;
private GeoDistance.DistanceBoundingCheck distanceBoundingCheck;
private final Query boundingBoxFilter;
private final IndexGeoPointFieldData indexFieldData;
public GeoDistanceRangeQuery(GeoPoint point, Double lowerVal, Double upperVal, boolean includeLower,
boolean includeUpper, GeoDistance geoDistance, GeoPointFieldMapperLegacy.GeoPointFieldType fieldType,
IndexGeoPointFieldData indexFieldData, String optimizeBbox) {
this.lat = point.lat();
this.lon = point.lon();
this.geoDistance = geoDistance;
this.indexFieldData = indexFieldData;
this.fixedSourceDistance = geoDistance.fixedSourceDistance(lat, lon, DistanceUnit.DEFAULT);
if (lowerVal != null) {
double f = lowerVal.doubleValue();
long i = NumericUtils.doubleToSortableLong(f);
inclusiveLowerPoint = NumericUtils.sortableLongToDouble(includeLower ? i : (i + 1L));
} else {
inclusiveLowerPoint = Double.NEGATIVE_INFINITY;
}
if (upperVal != null) {
double f = upperVal.doubleValue();
long i = NumericUtils.doubleToSortableLong(f);
inclusiveUpperPoint = NumericUtils.sortableLongToDouble(includeUpper ? i : (i - 1L));
} else {
inclusiveUpperPoint = Double.POSITIVE_INFINITY;
// we disable bounding box in this case, since the upper point is all and we create bounding box up to the
// upper point it will effectively include all
// TODO we can create a bounding box up to from and "not" it
optimizeBbox = null;
}
if (optimizeBbox != null && !"none".equals(optimizeBbox)) {
distanceBoundingCheck = GeoDistance.distanceBoundingCheck(lat, lon, inclusiveUpperPoint, DistanceUnit.DEFAULT);
if ("memory".equals(optimizeBbox)) {
boundingBoxFilter = null;
} else if ("indexed".equals(optimizeBbox)) {
boundingBoxFilter = IndexedGeoBoundingBoxQuery.create(distanceBoundingCheck.topLeft(), distanceBoundingCheck.bottomRight(), fieldType);
distanceBoundingCheck = GeoDistance.ALWAYS_INSTANCE; // fine, we do the bounding box check using the filter
} else {
throw new IllegalArgumentException("type [" + optimizeBbox + "] for bounding box optimization not supported");
}
} else {
distanceBoundingCheck = GeoDistance.ALWAYS_INSTANCE;
boundingBoxFilter = null;
}
}
public double lat() {
return lat;
}
public double lon() {
return lon;
}
public GeoDistance geoDistance() {
return geoDistance;
}
public double minInclusiveDistance() {
return inclusiveLowerPoint;
}
public double maxInclusiveDistance() {
return inclusiveUpperPoint;
}
public String fieldName() {
return indexFieldData.getFieldNames().indexName();
}
@Override
public Query rewrite(IndexReader reader) throws IOException {
return super.rewrite(reader);
}
@Override
public Weight createWeight(IndexSearcher searcher, boolean needsScores) throws IOException {
final Weight boundingBoxWeight;
if (boundingBoxFilter != null) {
boundingBoxWeight = searcher.createNormalizedWeight(boundingBoxFilter, false);
} else {
boundingBoxWeight = null;
}
return new ConstantScoreWeight(this) {
@Override
public Scorer scorer(LeafReaderContext context) throws IOException {
final DocIdSetIterator approximation;
if (boundingBoxWeight != null) {
Scorer s = boundingBoxWeight.scorer(context);
if (s == null) {
// if the approximation does not match anything, we're done
return null;
}
approximation = s.iterator();
} else {
approximation = DocIdSetIterator.all(context.reader().maxDoc());
}
final MultiGeoPointValues values = indexFieldData.load(context).getGeoPointValues();
final TwoPhaseIterator twoPhaseIterator = new TwoPhaseIterator(approximation) {
@Override
public boolean matches() throws IOException {
final int doc = approximation.docID();
values.setDocument(doc);
final int length = values.count();
for (int i = 0; i < length; i++) {
GeoPoint point = values.valueAt(i);
if (distanceBoundingCheck.isWithin(point.lat(), point.lon())) {
double d = fixedSourceDistance.calculate(point.lat(), point.lon());
if (d >= inclusiveLowerPoint && d <= inclusiveUpperPoint) {
return true;
}
}
}
return false;
}
@Override
public float matchCost() {
if (distanceBoundingCheck == GeoDistance.ALWAYS_INSTANCE) {
return 0.0f;
} else {
// TODO: is this right (up to 4 comparisons from GeoDistance.SimpleDistanceBoundingCheck)?
return 4.0f;
}
}
};
return new ConstantScoreScorer(this, score(), twoPhaseIterator);
}
};
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (super.equals(o) == false) return false;
GeoDistanceRangeQuery filter = (GeoDistanceRangeQuery) o;
if (Double.compare(filter.inclusiveLowerPoint, inclusiveLowerPoint) != 0) return false;
if (Double.compare(filter.inclusiveUpperPoint, inclusiveUpperPoint) != 0) return false;
if (Double.compare(filter.lat, lat) != 0) return false;
if (Double.compare(filter.lon, lon) != 0) return false;
if (!indexFieldData.getFieldNames().indexName().equals(filter.indexFieldData.getFieldNames().indexName()))
return false;
if (geoDistance != filter.geoDistance) return false;
return true;
}
@Override
public String toString(String field) {
return "GeoDistanceRangeQuery(" + indexFieldData.getFieldNames().indexName() + ", " + geoDistance + ", [" + inclusiveLowerPoint + " - " + inclusiveUpperPoint + "], " + lat + ", " + lon + ")";
}
@Override
public int hashCode() {
int result = super.hashCode();
long temp;
temp = lat != +0.0d ? Double.doubleToLongBits(lat) : 0L;
result = 31 * result + (int) (temp ^ (temp >>> 32));
temp = lon != +0.0d ? Double.doubleToLongBits(lon) : 0L;
result = 31 * result + (int) (temp ^ (temp >>> 32));
temp = inclusiveLowerPoint != +0.0d ? Double.doubleToLongBits(inclusiveLowerPoint) : 0L;
result = 31 * result + (int) (temp ^ (temp >>> 32));
temp = inclusiveUpperPoint != +0.0d ? Double.doubleToLongBits(inclusiveUpperPoint) : 0L;
result = 31 * result + (int) (temp ^ (temp >>> 32));
result = 31 * result + (geoDistance != null ? geoDistance.hashCode() : 0);
result = 31 * result + indexFieldData.getFieldNames().indexName().hashCode();
return result;
}
}