[webbeans-dev] removeObserver type

[David Allen]

On Thu, 2009-05-28 at 10:45 -0700, Gavin King wrote:
> On Thu, May 28, 2009 at 10:37 AM, David Allen <drallendc at gmail.com> wrote:
> > On Thu, 2009-05-28 at 10:18 -0700, Gavin King wrote:
> >> On Thu, May 28, 2009 at 2:14 AM, David Allen <drallendc at gmail.com> wrote:
> >>
> >> > So where do we get T now that the signature has changed to not include
> >> > it?
> >>
> >> do Observer.getClass().
> >
> > That would be the class Observer.  But how do we know what the type of
> > the event is?  In other words, it would have been the actual type used
> > with Observer<T> instead of the parameter T.  However, due to erasure,
> > that information will not be available inside the addObserver() method.
> 
> observer.getClass().getGenericInterfaces()
> 
> iterate to find observer, cast to ParameterizedType, call
> getActualTypeArguments().

Oops, of course.  I wasn't thinking of the implementing class with
observer.getClass().

Good call.  Those type parameters are superfluous.  :)

>