org.apache.shale.dialog.impl
Class AbstractState

java.lang.Object
  org.apache.shale.dialog.impl.AbstractState

All Implemented Interfaces:

State

Direct Known Subclasses:

ActionStateImpl, SubdialogStateImpl, ViewStateImpl

public abstract class AbstractState
extends Object
implements State

Abstract base class for State definitions. Each state is owned by exactly one owning Dialog. While an application is running, Dialog (and the constituent States and other configuration information) is immutable, so that it may be shared by multiple simultaneous paths of execution.

$Id: AbstractState.java 419431 2006-07-06 04:38:39Z wsmoak $

Field Summary

protected Log

log Log instance for this instance.

Constructor Summary

AbstractState()

Method Summary

void	addTransition(Transition transition) Add the specified Transition to the Transitions owned by this State.
Transition	findTransition(String outcome) Return the Transition for the specified logical outcome, if any; otherwise, return null.
Dialog	getDialog() Return the Dialog that owns this State.
String	getName() Return the identifier of this State, which must be unique among the States owned by the same Dialog.
Iterator	getTransitionOutcomes() Return an Iterator over the logical outcomes of local Transitions for this State.
void	removeTransition(Transition transition) Remove the specified Transition from the Transitions owned by this State, if it is currently registered.
void	setDialog(Dialog dialog) Set the Dialog that owns this State.
void	setName(String name) Set the identifier of this State, which must be unique among the States owned by the same Dialog.

Methods inherited from class java.lang.Object

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

Field Detail

log

protected final Log log

Log instance for this instance.

Constructor Detail

AbstractState

public AbstractState()

Method Detail

getDialog

public Dialog getDialog()

Return the Dialog that owns this State.

Specified by:

getDialog in interface State

getName

public String getName()

Return the identifier of this State, which must be unique among the States owned by the same Dialog.

Specified by:

getName in interface State

getTransitionOutcomes

public Iterator getTransitionOutcomes()

Return an Iterator over the logical outcomes of local Transitions for this State. If there are no such Transitions, an empty Iterator is returned.

Specified by:

getTransitionOutcomes in interface State

findTransition

public Transition findTransition(String outcome)

Return the Transition for the specified logical outcome, if any; otherwise, return null.

Specified by:

findTransition in interface State

Parameters:

outcome - Logical outcome for which to return a Transition

addTransition

public void addTransition(Transition transition)
                   throws IllegalArgumentException

Add the specified Transition to the Transitions owned by this State.

Parameters:

transition - Transition to be added

Throws:

IllegalArgumentException - if the specified Transition cannot be added to this State

removeTransition

public void removeTransition(Transition transition)

Remove the specified Transition from the Transitions owned by this State, if it is currently registered. Otherwise, do nothing.

Parameters:

transition - Transition to be removed

setDialog

public void setDialog(Dialog dialog)

Set the Dialog that owns this State.

Parameters:

dialog - New owning Dialog

setName

public void setName(String name)

Set the identifier of this State, which must be unique among the States owned by the same Dialog.

Parameters:

name - New identifier