Re: [webbeans-dev] removeObserver type
On Thu, May 28, 2009 at 10:37 AM, David Allen <drallendc(a)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(a)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().
--
Gavin King
gavin.king(a)gmail.com
http://in.relation.to/Bloggers/Gavin
http://hibernate.org
http://seamframework.org