Class NotificationEventCallback

  extended by org.apache.tapestry5.internal.util.NotificationEventCallback
All Implemented Interfaces:

public class NotificationEventCallback
extends Object
implements ComponentEventCallback

A ComponentEventCallback used for notification events. Event handler methods may return true (to abort the event) or false (to allow the event to continue bubbling up), but all other values are forbidden.

Constructor Summary
NotificationEventCallback(String eventType, String completeId)
Method Summary
 boolean handleResult(Object result)
          Invoked to handle a non-null event handler method result.
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public NotificationEventCallback(String eventType,
                                 String completeId)
Method Detail


public boolean handleResult(Object result)
Description copied from interface: ComponentEventCallback
Invoked to handle a non-null event handler method result. The handler should determine whether the value is acceptable, and throw an exception if not. Any thrown exception will be wrapped to identify the component and method from which the value was returned.

Boolean values are not passed to the callback. Booleans are used to indicate that the event has been handled (true, meaning the event is handled and aborted) or that a further search for handlers should continue (false, meaning the event was not handled, is not aborted, and the search up the component hierarchy for event handler methods should continue). If a component event method returns true, then Event.isAborted() will return true.

Specified by:
handleResult in interface ComponentEventCallback
result - the result value returned from the event handler method
true if the event is aborted, false if the event may continue

Copyright © 2003-2012 The Apache Software Foundation.