org.apache.tapestry5
Interface ComponentEventCallback<T>

All Known Implementing Classes:

ComponentResultProcessorWrapper, NotificationEventCallback

public interface ComponentEventCallback<T>

Callback interface for a org.apache.tapestry5.runtime.Event render phase event) or {@link org.apache.tapestry5.runtime.ComponentEvent}, notified when a non-null value is returned from some event handler method.

Method Summary

boolean

handleResult(T result) Invoked to handle a non-null event handler method result.

Method Detail

handleResult

boolean handleResult(T result)

Invoked to handle a non-null event handler method result. The handler should determine whether the value is acceptible, 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 handler. Booleans are used to indicate that the event has been handled (true) or that a further search for handlers should continue (true). If a component event method returns true, then Event.isAborted() will return true.

Parameters:

result - the result value return from the event handler method

Returns:

true if the event is aborted, false if the event may continue