Re: [webbeans-dev] event type with type variable
No, the spec prohibits type variables in event objects and event
types, it doesn't prohibit type parameters.
This isn't legal
public class Foo{
@Produces <T> Bar make(@Any Event<T> event) {
...
}
and we do need to error at deployment time for such a declaration. Do
we?
What you show *is* valid.
It's also not valid to actually pass an event object with a type
variable, but it's extremely hard to actually find code that will
compile and pass the above deployment test, but still do this and do
this so I can't find an example right now ;-)
On 24 Jul 2009, at 17:28, Dan Allen wrote:
In several places, the specification reiterates that an event type
may not contain a type variable. However, it appears that this
restriction is only enforced at runtime when the event object is
passed to either Event#fire() or BeanManager#fireEvent() method. I
would suggest that an validation check be added so that the
container detects an illegal Event definition at deployment type.
Here's an example of an illegal definition (from my understanding):
public class VoterRegistration<T> { ... }
@Any Event<VoterRegistration<Democrat>> democratRegisteredEvent;
-Dan
--
Dan Allen
Senior Software Engineer, Red Hat | Author of Seam in Action
Registered Linux User #231597
http://mojavelinux.com
http://mojavelinux.com/seaminaction
http://in.relation.to/Bloggers/Dan
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