StateMachine.ChangeEvent (JBoss/Common API) - JBoss 3.2.7 common API Documentation 英文版文档

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org.jboss.util.state
Class StateMachine.ChangeEvent

java.lang.Object
  java.util.EventObject
      org.jboss.util.state.StateMachine.ChangeEvent

All Implemented Interfaces:: Serializable

Enclosing class:: StateMachine

public static class StateMachine.ChangeEvent
extends EventObject

An event for state change notifications.

See Also:: Serialized Form

Field Summary

State current


State previous


Fields inherited from class java.util.EventObject

source

Constructor Summary

StateMachine.ChangeEvent(StateMachine source, State previous, State current)


Method Summary

State getCurrentState()
          The current state of the machine.

State getPreviousState()
          The previous state of the machine.

StateMachine getStateMachine()
          The state machine which generated the event.

String toString()


Methods inherited from class java.util.EventObject

getSource

Methods inherited from class java.lang.Object

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

Field Detail

public final State previous

current

public final State current

Constructor Detail

StateMachine.ChangeEvent

public StateMachine.ChangeEvent(StateMachine source,
                                State previous,
                                State current)

Method Detail

getPreviousState

public State getPreviousState()

The previous state of the machine.

This value will not be null unless the initial state of the machine implements Acceptable. This can be used to determine when the state machine has been reset.

Returns:: The previous state of the machine.

getCurrentState

public State getCurrentState()

The current state of the machine. ie. The state the machine has just transition into and which triggered the change event.

Returns:: The current state of the machine; will not be null.

getStateMachine

public StateMachine getStateMachine()

The state machine which generated the event.

toString

public String toString()