Package sim.engine

Class WeakStep

java.lang.Object

sim.engine.WeakStep

All Implemented Interfaces:

Serializable, Steppable

public class WeakStep
extends Object
implements Steppable

WeakStep is a wrapper for steppable objects in the situation where we only want the schedule to tenuously hold onto the steppable object -- that is, if everyone else has forgotten about the object, the schedule should as well. This is commonly the case for inspectors and other kinds of windows which might be closed by the user without any way to get back to the schedule and remove themselves. You schedule a Steppable weakly something like this:
mySchedule.schedule(new WeakStep(mySteppable));

A WeakStep can also wrap a Steppable you plan on scheduling repeating. You'd do it along these lines:
WeakStep weak = new WeakStep(mySteppable);
Stoppable stop = mySchedule.scheduleRepeating(weak);
weak.setStoppable(stop);
In this case, when the underlying Steppable is garbage-collected, then the schedule will automatically stop repeatedly stepping it. Note that the Stoppable is not stored weakly.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
WeakStep(Steppable step)

Method Summary

Modifier and Type	Method	Description
void	setStoppable(Stoppable stop)
void	step(SimState state)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

WeakStep

public WeakStep(Steppable step)

Method Details

setStoppable

public void setStoppable(Stoppable stop)

step

public void step(SimState state)

Specified by:

step in interface Steppable