org.apache.tapestry5.internal.services
Class ComponentResultProcessorWrapper

java.lang.Object
  org.apache.tapestry5.internal.services.ComponentResultProcessorWrapper

All Implemented Interfaces:

ComponentEventCallback, TrackableComponentEventCallback

public class ComponentResultProcessorWrapper
extends Object
implements TrackableComponentEventCallback

A wrapper around ComponentEventResultProcessor that encapsulates capturing the exception.

Constructor Summary

ComponentResultProcessorWrapper(ComponentEventResultProcessor processor)

Method Summary

boolean	handleResult(Object result) Invoked to handle a non-null event handler method result.
boolean	isAborted() Returns true if ComponentEventCallback.handleResult(Object) was invoked, false otherwise.
void	rethrow() If processing a return value threw an IOException, invoking this method will rethrow it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ComponentResultProcessorWrapper

public ComponentResultProcessorWrapper(ComponentEventResultProcessor processor)

Method Detail

handleResult

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

Parameters:

result - the result value returned from the event handler method

Returns:

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

isAborted

public boolean isAborted()

Returns true if ComponentEventCallback.handleResult(Object) was invoked, false otherwise.

Specified by:

isAborted in interface TrackableComponentEventCallback

Returns:

true if the event was aborted

rethrow

public void rethrow()
             throws IOException

Description copied from interface: TrackableComponentEventCallback

If processing a return value threw an IOException, invoking this method will rethrow it.

Specified by:

rethrow in interface TrackableComponentEventCallback

Throws:

IOException