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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);
}
}