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/**
* GeoLocation
* Copyright 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
* first published 08.10.2009 on http://yacy.net
*
* This file is part of YaCy Content Integration
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
package net.yacy.cora.geo;
import java.util.Comparator;
import net.yacy.cora.document.encoding.UTF8;
public class GeoLocation extends IntegerGeoPoint implements Comparable<GeoLocation>, Comparator<GeoLocation> {
private byte[] name;
private int population;
public GeoLocation(double lat, double lon) {
super(lat, lon);
this.name = null;
this.population = 0;
}
public GeoLocation(double lat, double lon, String name) {
super(lat, lon);
this.name = UTF8.getBytes(name);
}
public void setName(String name) {
this.name = UTF8.getBytes(name);
}
public String getName() {
return UTF8.String(this.name);
}
public void setPopulation(int population) {
this.population = population;
}
public int getPopulation() {
return this.population;
}
@Override
public boolean equals(Object loc) {
if (!(loc instanceof GeoLocation)) return false;
if (this.name == null || ((GeoLocation) loc).name == null) return super.equals(loc);
return super.equals(loc) && this.getName().toLowerCase().equals(((GeoLocation) loc).getName().toLowerCase());
}
/**
* comparator that is needed to use the object inside TreeMap/TreeSet
* a Location is smaller than another if it has a _greater_ population
* this order is used to get sorted lists of locations where the first elements
* have the greatest population
*/
@Override
public int compareTo(GeoLocation o) {
if (this.equals(o)) return 0;
long s = (ph(this.getPopulation()) << 30) + this.hashCode();
long t = (ph(o.getPopulation()) << 30) + o.hashCode();
if (s > t) return -1;
if (s < t) return 1;
return 0;
}
private static long ph(int population) {
if (population > 10000) population -= 10000;
return population;
}
@Override
public int compare(GeoLocation o1, GeoLocation o2) {
return o1.compareTo(o2);
}
public static int degreeToKm(double degree) {
return (int) (degree * 111.32d);
}
}
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