samer@0: /*
samer@0:  *	Copyright (c) 2001, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.tools;
samer@0: import samer.core.types.*;
samer@0: 
samer@0: /**
samer@0:   *		This is a task that runs a single child task
samer@0:   *		every N iterations, that is, at some integer
samer@0:   *      sub-multiple of the main loop rate
samer@0:   */
samer@0: 
samer@0: public class SwitchTask implements Task
samer@0: {
samer@0: 	private Task	task;
samer@0: 	private VBoolean	enable;
samer@0: 
samer@0: 	public SwitchTask(Task t) { this(true,t); }
samer@0: 	public SwitchTask(boolean e, Task t) { 
samer@0: 		enable=new VBoolean("enable",e); 
samer@0: 		enable.value=e; enable.changed(); task=t; 
samer@0: 	}
samer@0: 
samer@0: 
samer@0: 	public void enable() { enable.value=true; enable.changed(); }
samer@0: 	public void disable() { enable.value=false; enable.changed(); }
samer@0: 
samer@0: 	public final void starting() { if (enable.value) task.starting(); }
samer@0: 	public final void stopping() { if (enable.value) task.stopping(); }
samer@0: 	public final void run() throws Exception { if (enable.value) task.run(); }
samer@0: 
samer@0: 	public void dispose() { task.dispose(); }
samer@0: 	public String toString() { return "Switch("+enable.value+"):"+task; }
samer@0: }