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/*
* Licensed to ElasticSearch and Shay Banon 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.AtomicReaderContext;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.FixedBitSet;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.lucene.docset.DocIdSets;
import org.elasticsearch.index.mapper.geo.GeoPointFieldMapper;
import java.io.IOException;
/**
*/
public class IndexedGeoBoundingBoxFilter {
public static Filter create(GeoPoint topLeft, GeoPoint bottomRight, GeoPointFieldMapper fieldMapper) {
if (!fieldMapper.isEnableLatLon()) {
throw new ElasticSearchIllegalArgumentException("lat/lon is not enabled (indexed) for field [" + fieldMapper.name() + "], can't use indexed filter on it");
}
//checks to see if bounding box crosses 180 degrees
if (topLeft.lon() > bottomRight.lon()) {
return new LeftGeoBoundingBoxFilter(topLeft, bottomRight, fieldMapper);
} else {
return new RightGeoBoundingBoxFilter(topLeft, bottomRight, fieldMapper);
}
}
static class LeftGeoBoundingBoxFilter extends Filter {
final Filter lonFilter1;
final Filter lonFilter2;
final Filter latFilter;
public LeftGeoBoundingBoxFilter(GeoPoint topLeft, GeoPoint bottomRight, GeoPointFieldMapper fieldMapper) {
lonFilter1 = fieldMapper.lonMapper().rangeFilter(null, bottomRight.lon(), true, true);
lonFilter2 = fieldMapper.lonMapper().rangeFilter(topLeft.lon(), null, true, true);
latFilter = fieldMapper.latMapper().rangeFilter(bottomRight.lat(), topLeft.lat(), true, true);
}
@Override
public DocIdSet getDocIdSet(AtomicReaderContext context, Bits acceptedDocs) throws IOException {
FixedBitSet main;
DocIdSet set = lonFilter1.getDocIdSet(context, acceptedDocs);
if (DocIdSets.isEmpty(set)) {
main = null;
} else {
main = (FixedBitSet) set;
}
set = lonFilter2.getDocIdSet(context, acceptedDocs);
if (DocIdSets.isEmpty(set)) {
if (main == null) {
return null;
} else {
// nothing to do here, we remain with the main one
}
} else {
if (main == null) {
main = (FixedBitSet) set;
} else {
main.or((FixedBitSet) set);
}
}
set = latFilter.getDocIdSet(context, acceptedDocs);
if (DocIdSets.isEmpty(set)) {
return null;
}
main.and(set.iterator());
return main;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
LeftGeoBoundingBoxFilter that = (LeftGeoBoundingBoxFilter) o;
if (latFilter != null ? !latFilter.equals(that.latFilter) : that.latFilter != null) return false;
if (lonFilter1 != null ? !lonFilter1.equals(that.lonFilter1) : that.lonFilter1 != null) return false;
if (lonFilter2 != null ? !lonFilter2.equals(that.lonFilter2) : that.lonFilter2 != null) return false;
return true;
}
@Override
public int hashCode() {
int result = lonFilter1 != null ? lonFilter1.hashCode() : 0;
result = 31 * result + (lonFilter2 != null ? lonFilter2.hashCode() : 0);
result = 31 * result + (latFilter != null ? latFilter.hashCode() : 0);
return result;
}
}
static class RightGeoBoundingBoxFilter extends Filter {
final Filter lonFilter;
final Filter latFilter;
public RightGeoBoundingBoxFilter(GeoPoint topLeft, GeoPoint bottomRight, GeoPointFieldMapper fieldMapper) {
lonFilter = fieldMapper.lonMapper().rangeFilter(topLeft.lon(), bottomRight.lon(), true, true);
latFilter = fieldMapper.latMapper().rangeFilter(bottomRight.lat(), topLeft.lat(), true, true);
}
@Override
public FixedBitSet getDocIdSet(AtomicReaderContext context, Bits acceptedDocs) throws IOException {
FixedBitSet main;
DocIdSet set = lonFilter.getDocIdSet(context, acceptedDocs);
if (DocIdSets.isEmpty(set)) {
return null;
}
main = (FixedBitSet) set;
set = latFilter.getDocIdSet(context, acceptedDocs);
if (DocIdSets.isEmpty(set)) {
return null;
}
main.and(set.iterator());
return main;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
RightGeoBoundingBoxFilter that = (RightGeoBoundingBoxFilter) o;
if (latFilter != null ? !latFilter.equals(that.latFilter) : that.latFilter != null) return false;
if (lonFilter != null ? !lonFilter.equals(that.lonFilter) : that.lonFilter != null) return false;
return true;
}
@Override
public int hashCode() {
int result = lonFilter != null ? lonFilter.hashCode() : 0;
result = 31 * result + (latFilter != null ? latFilter.hashCode() : 0);
return result;
}
}
}
