001/*
002 * Copyright 2011 Marc Wick, geonames.org
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 */
017package org.geonames.utils;
018
019import java.util.Comparator;
020
021import org.geonames.WikipediaArticle;
022
023/**
024 * @author marc
025 * @since 16.02.2011
026 * 
027 */
028public class DistanceOrder implements Comparator<WikipediaArticle> {
029        private double latitude;
030        private double longitude;
031
032        public DistanceOrder(double pLat, double pLng) {
033                latitude = pLat;
034                longitude = pLng;
035        }
036
037        public int compare(WikipediaArticle o1, WikipediaArticle o2) {
038                double dist1 = dist(o1);
039                double dist2 = dist(o2);
040                return Double.compare(dist1, dist2);
041        }
042
043        private double dist(WikipediaArticle o) {
044                return Distance.distanceKM(latitude, longitude, o.getLatitude(), o
045                                .getLongitude());
046        }
047
048}