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/**------------------------------------------------------------------------------
MIT License
Copyright (c) 2022 JumperBot_
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*-----------------------------------------------------------------------------**/
package SomeUtils.Clock;
public class Timer{
//For demo only!
public static void main(String[]a){
Timer timer=new Timer();
timer.setWatcher(new Timer.TimerWatcher(){
public void hasStopped(boolean stopped){
System.out.print(stopped+" | ");
}
public void timeElapsed(long nano, long millis, long seconds){
System.out.print(nano+", ");
System.out.print(millis+", ");
System.out.print(seconds+" | ");
}
public void timeLeft(long timeLeft){
System.out.print(timeLeft+"\r");
}
});
//Block the thread for 5 seconds!
timer.stopAfter(5, Timer.seconds);
//So that our watcher won't go to waste.
System.out.println();
}
//The actual class!
long start=System.nanoTime();
public final static int millis=0;
public final static int seconds=1;
public final static int nanos=2;
public void start(){
start=System.nanoTime();
}
private long getTimeElapsed(){
return System.nanoTime()-start;
}
private long getTimeElapsed(final int unit){
final long timeElapsed=System.nanoTime()-start;
return (long)(
(unit==millis)?timeElapsed/1000000:
(unit==seconds)?(timeElapsed/1000000000):
timeElapsed
);
}
//Watcher is private.
TimerWatcher watcher=new TimerWatcher(){
public void hasStopped(boolean stopped){}
public void timeElapsed(long nano, long millis, long seconds){}
public void timeLeft(long timeLeft){}
};
public void stopAfter(final long duration, final int unit){
//No need to call #start() before #stopAfter().
start();
final long endAt=start+duration;
while(getTimeElapsed(unit)+start<endAt){
watcher.hasStopped(false);
watcher.timeElapsed(
getTimeElapsed(nanos),
getTimeElapsed(millis),
getTimeElapsed(seconds)
);
watcher.timeLeft(endAt-(getTimeElapsed(unit)+start));
}
watcher.hasStopped(true);
watcher.timeElapsed(
getTimeElapsed(nanos),
getTimeElapsed(millis),
getTimeElapsed(seconds)
);
watcher.timeLeft(0);
}
public void setWatcher(final TimerWatcher watcher){
this.watcher=watcher;
}
public interface TimerWatcher{
public void hasStopped(boolean stopped);
public void timeElapsed(long nano, long millis, long seconds);
public void timeLeft(long timeLeft);
}
}