/**
* <span class="changed_modified_2_0">Construct<span class="changed_modified_2_0"> a {@link
* ValueChangeListener} that contains a {@link MethodExpression}. <span
* class="changed_added_2_0">To accomodate method expression targets that take no arguments
* instead of taking an {@link ActionEvent} argument</span>, the implementation of this class must
* take the argument <code>methodExpressionOneArg</code>, extract its expression string, and
* create another <code>MethodExpression</code> whose expected param types match those of a zero
* argument method. The usage requirements for both of these <code>MethodExpression</code>
* instances are described in {@link #processAction}.</span></span>
*
* @param methodExpressionOneArg a <code>MethodExpression</code> that points to a method that
* returns <code>void</code> and takes a single argument of type {@link ActionEvent}.
*/
public MethodExpressionActionListener(MethodExpression methodExpressionOneArg) {
super();
this.methodExpressionOneArg = methodExpressionOneArg;
FacesContext context = FacesContext.getCurrentInstance();
ELContext elContext = context.getELContext();
this.methodExpressionZeroArg =
context
.getApplication()
.getExpressionFactory()
.createMethodExpression(
elContext,
methodExpressionOneArg.getExpressionString(),
Void.class,
ACTION_LISTENER_ZEROARG_SIG);
}
/**
* Notify afterPhase listener that is registered on the View Root.
*
* @param context the FacesContext for the current request
* @param lifecycle lifecycle instance
*/
private void notifyAfter(FacesContext context, Lifecycle lifecycle) {
UIViewRoot viewRoot = context.getViewRoot();
MethodExpression afterPhase = viewRoot.getAfterPhaseListener();
if (null != afterPhase) {
try {
PhaseEvent event = new PhaseEvent(context, PhaseId.RESTORE_VIEW, lifecycle);
afterPhase.invoke(context.getELContext(), new Object[] {event});
} catch (Exception e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(
Level.SEVERE,
"severe.component.unable_to_process_expression",
new Object[] {afterPhase.getExpressionString(), ("afterPhase")});
}
return;
}
}
}
