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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 org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.search.Filter;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.lucene.search.XBooleanFilter;
import org.elasticsearch.index.mapper.geo.GeoPointFieldMapper;
/**
*/
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 westGeoBoundingBoxFilter(topLeft, bottomRight, fieldMapper);
} else {
return eastGeoBoundingBoxFilter(topLeft, bottomRight, fieldMapper);
}
}
private static Filter westGeoBoundingBoxFilter(GeoPoint topLeft, GeoPoint bottomRight, GeoPointFieldMapper fieldMapper) {
XBooleanFilter filter = new XBooleanFilter();
filter.add(fieldMapper.lonMapper().rangeFilter(null, bottomRight.lon(), true, true), Occur.SHOULD);
filter.add(fieldMapper.lonMapper().rangeFilter(topLeft.lon(), null, true, true), Occur.SHOULD);
filter.add(fieldMapper.latMapper().rangeFilter(bottomRight.lat(), topLeft.lat(), true, true), Occur.MUST);
return filter;
}
private static Filter eastGeoBoundingBoxFilter(GeoPoint topLeft, GeoPoint bottomRight, GeoPointFieldMapper fieldMapper) {
XBooleanFilter filter = new XBooleanFilter();
filter.add(fieldMapper.lonMapper().rangeFilter(topLeft.lon(), bottomRight.lon(), true, true), Occur.MUST);
filter.add(fieldMapper.latMapper().rangeFilter(bottomRight.lat(), topLeft.lat(), true, true), Occur.MUST);
return filter;
}
}