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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.common.Nullable;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.index.fielddata.IndexGeoPointFieldData;
import org.elasticsearch.index.fielddata.MultiGeoPointValues;
/**
*
*/
public class InMemoryGeoBoundingBoxFilter extends Filter {
private final GeoPoint topLeft;
private final GeoPoint bottomRight;
private final IndexGeoPointFieldData indexFieldData;
public InMemoryGeoBoundingBoxFilter(GeoPoint topLeft, GeoPoint bottomRight, IndexGeoPointFieldData indexFieldData) {
this.topLeft = topLeft;
this.bottomRight = bottomRight;
this.indexFieldData = indexFieldData;
}
public GeoPoint topLeft() {
return topLeft;
}
public GeoPoint bottomRight() {
return bottomRight;
}
public String fieldName() {
return indexFieldData.getFieldNames().indexName();
}
@Override
public DocIdSet getDocIdSet(LeafReaderContext context, Bits acceptedDocs) throws IOException {
final MultiGeoPointValues values = indexFieldData.load(context).getGeoPointValues();
//checks to see if bounding box crosses 180 degrees
if (topLeft.lon() > bottomRight.lon()) {
return new Meridian180GeoBoundingBoxDocSet(context.reader().maxDoc(), acceptedDocs, values, topLeft, bottomRight);
} else {
return new GeoBoundingBoxDocSet(context.reader().maxDoc(), acceptedDocs, values, topLeft, bottomRight);
}
}
@Override
public String toString() {
return "GeoBoundingBoxFilter(" + indexFieldData.getFieldNames().indexName() + ", " + topLeft + ", " + bottomRight + ")";
}
public static class Meridian180GeoBoundingBoxDocSet extends DocValuesDocIdSet {
private final MultiGeoPointValues values;
private final GeoPoint topLeft;
private final GeoPoint bottomRight;
public Meridian180GeoBoundingBoxDocSet(int maxDoc, @Nullable Bits acceptDocs, MultiGeoPointValues values, GeoPoint topLeft, GeoPoint bottomRight) {
super(maxDoc, acceptDocs);
this.values = values;
this.topLeft = topLeft;
this.bottomRight = bottomRight;
}
@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 (((topLeft.lon() <= point.lon() || bottomRight.lon() >= point.lon())) &&
(topLeft.lat() >= point.lat() && bottomRight.lat() <= point.lat())) {
return true;
}
}
return false;
}
}
public static class GeoBoundingBoxDocSet extends DocValuesDocIdSet {
private final MultiGeoPointValues values;
private final GeoPoint topLeft;
private final GeoPoint bottomRight;
public GeoBoundingBoxDocSet(int maxDoc, @Nullable Bits acceptDocs, MultiGeoPointValues values, GeoPoint topLeft, GeoPoint bottomRight) {
super(maxDoc, acceptDocs);
this.values = values;
this.topLeft = topLeft;
this.bottomRight = bottomRight;
}
@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 (topLeft.lon() <= point.lon() && bottomRight.lon() >= point.lon()
&& topLeft.lat() >= point.lat() && bottomRight.lat() <= point.lat()) {
return true;
}
}
return false;
}
}
}