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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.index.search.geo;
import java.io.IOException;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.DocValuesDocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.Bits;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.geo.GeoDistance;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.lucene.docset.AndDocIdSet;
import org.elasticsearch.common.lucene.docset.DocIdSets;
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;
/**
*/
public class GeoDistanceFilter extends Filter {
private final double lat;
private final double lon;
private final double distance; // in miles
private final GeoDistance geoDistance;
private final IndexGeoPointFieldData indexFieldData;
private final GeoDistance.FixedSourceDistance fixedSourceDistance;
private final GeoDistance.DistanceBoundingCheck distanceBoundingCheck;
private final Filter boundingBoxFilter;
public GeoDistanceFilter(double lat, double lon, double distance, GeoDistance geoDistance, IndexGeoPointFieldData indexFieldData, GeoPointFieldMapper mapper,
String optimizeBbox) {
this.lat = lat;
this.lon = lon;
this.distance = distance;
this.geoDistance = geoDistance;
this.indexFieldData = indexFieldData;
this.fixedSourceDistance = geoDistance.fixedSourceDistance(lat, lon, DistanceUnit.DEFAULT);
GeoDistance.DistanceBoundingCheck distanceBoundingCheck = null;
if (optimizeBbox != null && !"none".equals(optimizeBbox)) {
distanceBoundingCheck = GeoDistance.distanceBoundingCheck(lat, lon, distance, DistanceUnit.DEFAULT);
if ("memory".equals(optimizeBbox)) {
boundingBoxFilter = null;
} else if ("indexed".equals(optimizeBbox)) {
boundingBoxFilter = IndexedGeoBoundingBoxFilter.create(distanceBoundingCheck.topLeft(), distanceBoundingCheck.bottomRight(), mapper);
distanceBoundingCheck = GeoDistance.ALWAYS_INSTANCE; // fine, we do the bounding box check using the filter
} else {
throw new ElasticsearchIllegalArgumentException("type [" + optimizeBbox + "] for bounding box optimization not supported");
}
} else {
distanceBoundingCheck = GeoDistance.ALWAYS_INSTANCE;
boundingBoxFilter = null;
}
this.distanceBoundingCheck = distanceBoundingCheck;
}
public double lat() {
return lat;
}
public double lon() {
return lon;
}
public double distance() {
return distance;
}
public GeoDistance geoDistance() {
return geoDistance;
}
public String fieldName() {
return indexFieldData.getFieldNames().indexName();
}
@Override
public DocIdSet getDocIdSet(LeafReaderContext context, Bits acceptedDocs) throws IOException {
DocIdSet boundingBoxDocSet = null;
if (boundingBoxFilter != null) {
boundingBoxDocSet = boundingBoxFilter.getDocIdSet(context, null);
if (DocIdSets.isEmpty(boundingBoxDocSet)) {
return null;
}
}
final MultiGeoPointValues values = indexFieldData.load(context).getGeoPointValues();
GeoDistanceDocSet distDocSet = new GeoDistanceDocSet(context.reader().maxDoc(), acceptedDocs, values, fixedSourceDistance, distanceBoundingCheck, distance);
if (boundingBoxDocSet == null) {
return distDocSet;
} else {
return new AndDocIdSet(new DocIdSet[]{boundingBoxDocSet, distDocSet});
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
GeoDistanceFilter filter = (GeoDistanceFilter) o;
if (Double.compare(filter.distance, distance) != 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() {
return "GeoDistanceFilter(" + indexFieldData.getFieldNames().indexName() + ", " + geoDistance + ", " + distance + ", " + lat + ", " + lon + ")";
}
@Override
public int hashCode() {
int result;
long temp;
temp = lat != +0.0d ? Double.doubleToLongBits(lat) : 0L;
result = (int) (temp ^ (temp >>> 32));
temp = lon != +0.0d ? Double.doubleToLongBits(lon) : 0L;
result = 31 * result + (int) (temp ^ (temp >>> 32));
temp = distance != +0.0d ? Double.doubleToLongBits(distance) : 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;
}
public static class GeoDistanceDocSet extends DocValuesDocIdSet {
private final double distance; // in miles
private final MultiGeoPointValues values;
private final GeoDistance.FixedSourceDistance fixedSourceDistance;
private final GeoDistance.DistanceBoundingCheck distanceBoundingCheck;
public GeoDistanceDocSet(int maxDoc, @Nullable Bits acceptDocs, MultiGeoPointValues values, GeoDistance.FixedSourceDistance fixedSourceDistance, GeoDistance.DistanceBoundingCheck distanceBoundingCheck,
double distance) {
super(maxDoc, acceptDocs);
this.values = values;
this.fixedSourceDistance = fixedSourceDistance;
this.distanceBoundingCheck = distanceBoundingCheck;
this.distance = distance;
}
@Override
protected boolean matchDoc(int doc) {
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 < distance) {
return true;
}
}
}
return false;
}
}
}