org.apache.solr.search.function.distance.GeohashHaversineFunction Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.solr.search.function.distance;
import java.io.IOException;
import java.util.Map;
import java.util.Objects;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.queries.function.FunctionValues;
import org.apache.lucene.queries.function.ValueSource;
import org.apache.lucene.queries.function.docvalues.DoubleDocValues;
import org.apache.lucene.search.IndexSearcher;
import org.locationtech.spatial4j.context.SpatialContext;
import org.locationtech.spatial4j.distance.DistanceUtils;
import org.locationtech.spatial4j.distance.GeodesicSphereDistCalc;
import org.locationtech.spatial4j.io.GeohashUtils;
import org.locationtech.spatial4j.shape.Point;
/**
* Calculate the Haversine distance between two geo hash codes.
*
* Ex: ghhsin(ValueSource, ValueSource, radius)
*
* @see org.apache.solr.search.function.distance.HaversineFunction for more details on the
* implementation
*/
@Deprecated
public class GeohashHaversineFunction extends ValueSource {
private final ValueSource geoHash1, geoHash2;
private final SpatialContext ctx;
private final double degreesToDist;
public GeohashHaversineFunction(ValueSource geoHash1, ValueSource geoHash2, double radius) {
this.geoHash1 = geoHash1;
this.geoHash2 = geoHash2;
this.degreesToDist = DistanceUtils.degrees2Dist(1, radius);
this.ctx = SpatialContext.GEO;
assert this.ctx.getDistCalc() instanceof GeodesicSphereDistCalc.Haversine;
}
protected String name() {
return "ghhsin";
}
@Override
public FunctionValues getValues(Map