Module jakarta.faces

Package jakarta.faces.event

Class FacesEvent

java.lang.Object

java.util.EventObject

jakarta.faces.event.FacesEvent

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ActionEvent, BehaviorEvent, ValueChangeEvent

public abstract class FacesEvent
extends EventObject

FacesEvent is the base class for user interface and application events that can be fired by UIComponents. Concrete event classes must subclass FacesEvent in order to be supported by the request processing lifecycle.

See Also:

• Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
FacesEvent(UIComponent component)	Construct a new event object from the specified source component.
FacesEvent(FacesContext facesContext, UIComponent component)	Construct a new event object from the Faces context and specified source component.

Method Summary

Modifier and Type	Method	Description
UIComponent	getComponent()	Return the source UIComponent that sent this event.
FacesContext	getFacesContext()	Get the Faces context.
PhaseId	getPhaseId()	Return the identifier of the request processing phase during which this event should be delivered.
abstract boolean	isAppropriateListener(FacesListener listener)	Return true if this FacesListener is an instance of a listener class that this event supports.
abstract void	processListener(FacesListener listener)	Broadcast this FacesEvent to the specified FacesListener, by whatever mechanism is appropriate.
void	queue()	Convenience method to queue this event for broadcast at the end of the current request processing lifecycle phase.
void	setPhaseId(PhaseId phaseId)	Set the PhaseId during which this event will be delivered.

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Constructor Details

FacesEvent

public FacesEvent(UIComponent component)

Construct a new event object from the specified source component.

Parameters:

component - Source UIComponent for this event

Throws:

IllegalArgumentException - if component is null

FacesEvent

public FacesEvent(FacesContext facesContext,
 UIComponent component)

Construct a new event object from the Faces context and specified source component.

Parameters:

facesContext - the Faces context.

component - Source UIComponent for this event.

Throws:

IllegalArgumentException - if component is null

Since:

2.3

Method Details

getComponent

public UIComponent getComponent()

Return the source UIComponent that sent this event.

Returns:

the source UI component.

getFacesContext

public FacesContext getFacesContext()

Get the Faces context.

If the constructor was passed a FacesContext we return it, otherwise we call FacesContext.getCurrentInstance() and return it.

Returns:

the Faces context.

Since:

2.3

getPhaseId

public PhaseId getPhaseId()

Return the identifier of the request processing phase during which this event should be delivered. Legal values are the singleton instances defined by the PhaseId class, including PhaseId.ANY_PHASE, which is the default value.

Returns:

the phase id.

setPhaseId

public void setPhaseId(PhaseId phaseId)

Set the PhaseId during which this event will be delivered.

Parameters:

phaseId - the phase id.

Throws:

IllegalArgumentException - phaseId is null.

queue

public void queue()

Convenience method to queue this event for broadcast at the end of the current request processing lifecycle phase.

Throws:

IllegalStateException - if the source component for this event is not a descendant of a UIViewRoot

isAppropriateListener

public abstract boolean isAppropriateListener(FacesListener listener)

Return true if this FacesListener is an instance of a listener class that this event supports. Typically, this will be accomplished by an "instanceof" check on the listener class.

Parameters:

listener - FacesListener to evaluate

Returns:

true if it is the appropriate instance, false otherwise.

processListener

public abstract void processListener(FacesListener listener)

Broadcast this FacesEvent to the specified FacesListener, by whatever mechanism is appropriate. Typically, this will be accomplished by calling an event processing method, and passing this FacesEvent as a paramter.

Parameters:

listener - FacesListener to send this FacesEvent to

Throws:

AbortProcessingException - Signal the Jakarta Faces implementation that no further processing on the current event should be performed