[webbeans-dev] Re: Injection point metadata API

[Gavin King]

Upon further consideration, I think we should not add the
getInstance() method to InjectionPoint. First, because:

* it can't return a value when constructor injection is happening,
* it always returns an object in an undefined state,
* I have not been able to think of a compelling usecase,
* it places subtle restrictions on implementations of Bean, and
* we're starting to use InjectionPoint as a *static* metadata API so
it would have to be moved anyway.

Does anyone disagree with this decision?

On Wed, Dec 24, 2008 at 5:40 PM, Gavin King <gavin at hibernate.org> wrote:
> ---------- Forwarded message ----------
> From: Matt Drees <matt.drees at gmail.com>
> Date: Sun, Nov 16, 2008 at 4:25 PM
> Subject: Injection point metadata API
> To: Gavin King <gavin at hibernate.org>, Java Community Process JSR #299
> Expert List <JSR-299-EG at jcp.org>
>
>
> I really really liked the feature Gavin talked about here:
> http://relation.to/Bloggers/InjectionPointMetadataAPIForWebBeans
> I think there are some very cool possibilities this opens up for
> framework developers and application utility libraries.  IMO, this is
> a low-cost, high yield feature.
>
> Two other thought about this.
> First, I think it'd be nice to add a method to Manager:
> public interface Manager {
> public <T> T getInstance(Bean<T> bean, InjectionPoint injectionPoint);
> ...
> }
>
> This way if a framework ever has to manually inject objects into a
> non-WebBean, a @Current InjectionPoint can be made available to the
> injected object.
>
> Second, maybe the InjectionPoint could also be made available to the
> Context during a lookup?  This way custom pseudo-scopes can be much
> more interesting.  I haven't thought about this enough, but it sounds
> cool.  :-)
> What do you think?
>
> -Matt
>
>
>
> --
> Gavin King
> gavin.king at gmail.com
> http://in.relation.to/Bloggers/Gavin
> http://hibernate.org
> http://seamframework.org
>



-- 
Gavin King
gavin.king at gmail.com
http://in.relation.to/Bloggers/Gavin
http://hibernate.org
http://seamframework.org