gpsdata.java

国外的一个开源gps模拟器源代码

/*
 * Copyright (c) 2007 by the University of Applied Sciences Northwestern Switzerland (FHNW)
 * 
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */

package ch.fhnw.imvs.gpssimulator.data;

import java.util.Vector;

public final class GPSData {
	
	public enum Status { A, V };

	public enum Orientation { EAST, WEST, NORTH, SOUTH;
		@Override
		public String toString(){return this.name().substring(0,1) + this.name().substring(1).toLowerCase();}
	};
	
	public enum Mode {
		AUTONOMOUS, DIFFERENTIAL, ESTIMATED, NOT_VALID, SIMULATOR
	}

	private static Status status;
	private static double latitude;
	private static double longitude;
	private static Orientation ns;
	private static Orientation ew;
	private static double speed;
	private static double altitude;
	private static int course;
	private static int satellites;
	private static int quality;
	private static double pdop;
	private static double hdop;
	private static double vdop;
	private static Mode mode;
	
	// set default values

	static {
		status = GPSData.Status.A;
		latitude = 47.48135;
		longitude = 8.20797;
		ns = Orientation.NORTH;
		ew = Orientation.EAST;
		speed = 3;
		altitude = 315;
		course = 314;
		satellites = 5;
		quality = 1;
		hdop = 2;
		vdop = 2;
		pdop = 2.8;
		mode = Mode.SIMULATOR;
	}

	private static Vector<GPSDataListener> listeners = new Vector<GPSDataListener>();
	private static boolean running = false;
	
	public static void addChangeListener(GPSDataListener listener) {
		listeners.add(listener);
	}
	
	public static void start(){
		if(!running){
			running = true;
			notifyChange();
		}
	}
	
	
	private static void notifyChange(){
		if(running)
			for(GPSDataListener l : listeners){
				l.valueChanged();
			}
	}

	private  GPSData(){}
	
	public static Status getStatus() { return status; }
	public static void setStatus(Status status) {
		if(GPSData.status != status){GPSData.status = status; notifyChange();}
	}

	public synchronized static double getLatitude() { return latitude; }
	public synchronized static void setLatitude(double latitude) {
		if(GPSData.latitude != latitude){ GPSData.latitude = latitude; notifyChange(); }
	}

	public synchronized static double getLongitude() { return longitude; }
	public synchronized static void setLongitude(double longitude) {
		if(GPSData.longitude != longitude){GPSData.longitude = longitude; notifyChange();}
	}
	
	public static Orientation getEW() { return ew;	}
	public static void setEW(Orientation ew) {
		if(ew == Orientation.NORTH || ew == Orientation.SOUTH) throw new IllegalArgumentException();
		if(GPSData.ew != ew){ GPSData.ew = ew; notifyChange(); }
	}

	public static Orientation getNS() { return ns;	}
	public static void setNS(Orientation ns) {
		if(ns == Orientation.EAST || ns == Orientation.WEST) throw new IllegalArgumentException();
		if(GPSData.ns != ns){ GPSData.ns = ns; notifyChange(); }
	}
	
	public synchronized static double getSpeed() { return speed; }
	public synchronized static void setSpeed(double speed) {
		if(GPSData.speed != speed){ GPSData.speed = speed; notifyChange(); }
	}
	
	public synchronized static double getAltitude() { return altitude; }
	public synchronized static void setAltitude(double altitude) {
		if(GPSData.altitude != altitude){ GPSData.altitude = altitude; notifyChange(); }
	}

	public static int getCourse() {	return course; }
	public static void setCourse(int course) {
		if(GPSData.course != course){ GPSData.course = course; notifyChange(); }
	}
	
	public static int getSatellites() { return satellites; }
	public static void setSatellites(int satellites) {
		if(GPSData.satellites != satellites){ GPSData.satellites = satellites; notifyChange(); }
	}
	
	public static int getQuality() { return quality; }
	public static void setQuality(int quality) {
		if(GPSData.quality != quality){GPSData.quality = quality; notifyChange();}
	}

	public synchronized static double getPDOP() { return pdop; }
	public synchronized static void setPDOP(double pdop) {
		if(GPSData.pdop != pdop) { GPSData.pdop = pdop; notifyChange(); }
	}
	
	public synchronized static double getHDOP() { return hdop; }	
	public synchronized static void setHDOP(double hdop) {
		if(GPSData.hdop != hdop){GPSData.hdop = hdop; notifyChange();}
	}

	public synchronized static double getVDOP() { return vdop; }
	public synchronized static void setVDOP(double vdop) {
		if(GPSData.vdop != vdop){GPSData.vdop = vdop; notifyChange();}
	}

	public synchronized static Mode getMode() { return mode; }
	public synchronized static void setMode(Mode mode) {
		if(GPSData.mode != mode){GPSData.mode = mode; notifyChange();}
	}
}