| /* |
| * 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.handler; |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.math3.exception.DimensionMismatchException; |
| import org.apache.commons.math3.ml.distance.DistanceMeasure; |
| import org.apache.lucene.util.SloppyMath; |
| import org.apache.solr.client.solrj.io.Tuple; |
| import org.apache.solr.client.solrj.io.eval.RecursiveEvaluator; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamExpression; |
| import org.apache.solr.client.solrj.io.stream.expr.StreamFactory; |
| |
| public class HaversineMetersEvaluator extends RecursiveEvaluator { |
| protected static final long serialVersionUID = 1L; |
| |
| public HaversineMetersEvaluator(StreamExpression expression, StreamFactory factory) throws IOException{ |
| super(expression, factory); |
| } |
| |
| |
| @Override |
| public Object evaluate(Tuple tuple) throws IOException { |
| return new HaversineDistance(); |
| } |
| |
| @Override |
| public Object doWork(Object... values) throws IOException { |
| // Nothing to do here |
| throw new IOException("This call should never occur"); |
| } |
| |
| public static class HaversineDistance implements DistanceMeasure { |
| private static final long serialVersionUID = -9108154600539125566L; |
| |
| public HaversineDistance() { |
| } |
| |
| public double compute(double[] a, double[] b) throws DimensionMismatchException { |
| return SloppyMath.haversinMeters(a[0], a[1], b[0], b[1]); |
| } |
| } |
| |
| } |