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package javax.faces.event;


import javax.faces.component.UIComponent;


/**
 * 

A {@link ValueChangeEvent} is a notification that the local value of * the source component has been change as a result of user interface * activity. It is not fired unless validation of the new value was * completed successfully.

*/ public class ValueChangeEvent extends FacesEvent { // ------------------------------------------------------------ Constructors /** *

Construct a new event object from the specified source component, * old value, and new value.

* *

The default {@link PhaseId} for this event is {@link * PhaseId#ANY_PHASE}.

* * @param component Source {@link UIComponent} for this event * @param oldValue The previous local value of this {@link UIComponent} * @param newValue The new local value of thie {@link UIComponent} * * @throws IllegalArgumentException if component is * null */ public ValueChangeEvent(UIComponent component, Object oldValue, Object newValue) { super(component); this.oldValue = oldValue; this.newValue = newValue; } // -------------------------------------------------------------- Properties /** *

The previous local value of the source {@link UIComponent}.

*/ private Object oldValue = null; /** *

Return the previous local value of the source {@link UIComponent}. *

*/ public Object getOldValue() { return (this.oldValue); } /** *

The current local value of the source {@link UIComponent}.

*/ private Object newValue = null; /** *

Return the current local value of the source {@link UIComponent}. *

*/ public Object getNewValue() { return (this.newValue); } // ------------------------------------------------- Event Broadcast Methods public boolean isAppropriateListener(FacesListener listener) { return (listener instanceof ValueChangeListener); } /** * @throws AbortProcessingException {@inheritDoc} */ public void processListener(FacesListener listener) { ((ValueChangeListener) listener).processValueChange(this); } }




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