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:

  • 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 Server Faces implementation that no further processing on the current event should be performed