Location/Coordinates and has initializers with correct order of lat,lon coordinatespull/1/head
Michael Peter Christen
13 years ago
parent
62ae9bbfda
commit
96c8119b50
@ -1,73 +0,0 @@
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/**
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* Coordinates.java
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* Copyright 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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* first published 04.10.2009 on http://yacy.net
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*
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* This file is part of YaCy Content Integration
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.geolocalization;
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public class Coordinates {
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private static final double tenmeter = 90.0d / 1.0e6d;
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private final double lon, lat;
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public Coordinates(double lon, double lat) {
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this.lon = lon;
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this.lat = lat;
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}
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public double lon() {
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return this.lon;
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}
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public double lat() {
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return this.lat;
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}
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private static final double bits30 = new Double(1L << 30).doubleValue(); // this is about one billion (US)
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private static final double upscale = bits30 / 360.0;
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private static final int coord2int(double coord) {
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return (int) ((180.0 - coord) * upscale);
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}
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/**
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* compute the hash code of a coordinate
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* this produces identical hash codes for locations that are close to each other
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*/
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public int hashCode() {
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return coord2int(this.lon) + (coord2int(this.lat) >> 15);
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}
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/**
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* equality test that is needed to use the class inside HashMap/HashSet
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*/
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public boolean equals(final Object o) {
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if (!(o instanceof Coordinates)) return false;
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Coordinates oo = (Coordinates) o;
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if (this.lon == oo.lon && this.lat == oo.lat) return true;
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// we access fuzzy values that are considered as equal if they are close to each other
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return Math.abs(this.lon - oo.lon) < tenmeter && Math.abs(this.lat - oo.lat) < tenmeter;
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}
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public String toString() {
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return "[" + this.lon + "," + this.lat + "]";
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}
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}
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@ -1,90 +1,93 @@
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/**
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* Location.java
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* Copyright 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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* first published 08.10.2009 on http://yacy.net
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*
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* This file is part of YaCy Content Integration
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.geolocalization;
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import java.util.Comparator;
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public class Location extends Coordinates implements Comparable<Location>, Comparator<Location> {
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private String name;
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private int population;
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public Location(float lon, float lat) {
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super(lon, lat);
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this.name = null;
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this.population = 0;
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}
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public Location(float lon, float lat, String name) {
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super(lon, lat);
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this.name = name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getName() {
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return this.name;
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}
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public void setPopulation(int population) {
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this.population = population;
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}
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public int getPopulation() {
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return this.population;
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}
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public boolean equals(Object loc) {
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if (!(loc instanceof Location)) return false;
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if (this.name == null || ((Location) loc).name == null) return super.equals(loc);
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return super.equals(loc) && this.name.toLowerCase().equals(((Location) loc).name.toLowerCase());
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}
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/**
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* comparator that is needed to use the object inside TreeMap/TreeSet
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* a Location is smaller than another if it has a _greater_ population
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* this order is used to get sorted lists of locations where the first elements
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* have the greatest population
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*/
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public int compareTo(Location o) {
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if (this.equals(o)) return 0;
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long s = (ph(this.getPopulation()) << 30) + this.hashCode();
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long t = (ph(o.getPopulation()) << 30) + o.hashCode();
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if (s > t) return -1;
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if (s < t) return 1;
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return 0;
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}
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private long ph(int population) {
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if (population > 10000) population -= 10000;
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return (long) population;
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}
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public int compare(Location o1, Location o2) {
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return o1.compareTo(o2);
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}
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}
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/**
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* GeoLocation
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* Copyright 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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* first published 08.10.2009 on http://yacy.net
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*
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* This file is part of YaCy Content Integration
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.geolocalization;
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import java.util.Comparator;
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public class GeoLocation extends GeoPoint implements Comparable<GeoLocation>, Comparator<GeoLocation> {
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private String name;
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private int population;
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public GeoLocation(double lat, double lon) {
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super(lat, lon);
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this.name = null;
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this.population = 0;
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}
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public GeoLocation(double lat, double lon, String name) {
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super(lat, lon);
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this.name = name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getName() {
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return this.name;
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}
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public void setPopulation(int population) {
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this.population = population;
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}
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public int getPopulation() {
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return this.population;
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}
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@Override
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public boolean equals(Object loc) {
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if (!(loc instanceof GeoLocation)) return false;
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if (this.name == null || ((GeoLocation) loc).name == null) return super.equals(loc);
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return super.equals(loc) && this.name.toLowerCase().equals(((GeoLocation) loc).name.toLowerCase());
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}
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/**
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* comparator that is needed to use the object inside TreeMap/TreeSet
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* a Location is smaller than another if it has a _greater_ population
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* this order is used to get sorted lists of locations where the first elements
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* have the greatest population
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*/
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@Override
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public int compareTo(GeoLocation o) {
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if (this.equals(o)) return 0;
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long s = (ph(this.getPopulation()) << 30) + this.hashCode();
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long t = (ph(o.getPopulation()) << 30) + o.hashCode();
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if (s > t) return -1;
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if (s < t) return 1;
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return 0;
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}
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private long ph(int population) {
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if (population > 10000) population -= 10000;
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return population;
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}
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@Override
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public int compare(GeoLocation o1, GeoLocation o2) {
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return o1.compareTo(o2);
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}
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}
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@ -0,0 +1,91 @@
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/**
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* GeoPoint
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* Copyright 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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* first published 08.10.2009 on http://yacy.net
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*
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* This file is part of YaCy Content Integration
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.geolocalization;
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public class GeoPoint {
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public static final double meter = 90.0d / 1.0e7d; // this is actually the definition of 'meter': 10 million meter shall be the distance from the equator to the pole
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private final long latlon; // using one variable for the coordinate pair saves some space
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public GeoPoint(double lat, double lon) {
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this.latlon = (((long) coord2int(lat)) << 32) | (coord2int(lon));
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}
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public GeoPoint(int lat, int lon) {
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this.latlon = (((long) coord2int(lat / 1e6d)) << 32) | (coord2int(lon / 1e6d));
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}
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public double lon() {
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return int2coord((int) (this.latlon & (Integer.MAX_VALUE)));
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}
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public double lat() {
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return int2coord((int) (this.latlon >>> 32));
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}
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private static final double maxint = new Double(Integer.MAX_VALUE).doubleValue();
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private static final double upscale = maxint / 360.0;
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private static final int coord2int(double coord) {
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return (int) ((coord + 180.0) * upscale);
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}
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private static final double int2coord(int z) {
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return (z / upscale) - 180.0;
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}
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/**
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* compute the hash code of a coordinate
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* this produces identical hash codes for locations that are close to each other
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*/
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@Override
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public int hashCode() {
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return (int) ((this.latlon & Integer.MAX_VALUE) >> 1) + (int) (this.latlon >> 33);
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}
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/**
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* equality test that is needed to use the class inside HashMap/HashSet
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*/
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@Override
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public boolean equals(final Object o) {
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if (!(o instanceof GeoPoint)) return false;
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GeoPoint oo = (GeoPoint) o;
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return (this.latlon == oo.latlon);
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}
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@Override
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public String toString() {
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return "[" + this.lat() + "," + this.lon() + "]";
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}
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public static void main(String[] args) {
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double lat = 13.419444d;
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double lon = 52.548611d;
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GeoPoint c = new GeoPoint(lat, lon);
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System.out.println(c.toString() + " #" + c.hashCode());
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System.out.println("error: lat: " + (Math.abs(c.lat() - lat) / meter) + " meter; lon: " + (Math.abs(c.lon() - lon) / meter) + " meter");
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}
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}
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