on exception transition

[KameS]

Hi
I have a question: I have a <transition on-exception> element

how do I get to the exception properties?
I wanna do something like this:

<transition on-exception="ValidationFailedException" to="importFiles">
<set name="flashScope.messageCode" value="validationFailedException.getMessageText()" />
</transition>

[KameS]

Maybe some further explaining is in order. I now have something like this:

<transition on-exception="path.to.class.ValidationFailedException" to="importFiles">
	<set name="flashScope.messageCode" value="'fileimport.error.validation_failed'" />
</transition>

so now the message that is set is hardcoded. But I'd like to have it customized in the exception somehow, like:

<transition on-exception="path.to.class.ValidationFailedException" to="importFiles">
	<set name="flashScope.messageCode" value="ValidationFailedException.getMessageText()" />
</transition>