Class TriggerOnce

All Implemented Interfaces:
Comparable<NamedBean>, PropertyChangeProvider, Base, DigitalExpression, DigitalExpressionBean, FemaleSocketListener, NamedBean

public class TriggerOnce
extends AbstractDigitalExpression
implements FemaleSocketListener
An Expression that returns True only once while its child expression returns True.

The first time the child expression returns True, this expression returns True. After that, this expression returns False until the child expression returns False and again returns True.