Re: [webbeans-dev] Re: Rough draft proposal for resource injection

On Jan 8, 2009, at 9:53 AM, Gavin King wrote: It might be a subtype of Bean, just like the Decorator is a subtype, but its functionality is different because it's used to select a new Bean type (i.e. not simple bean). It's not a bean itself. Take the following: <sqlx:DataSource> <ann:Resource>... </sqx:DataSource> This fragment defines a Bean (with the registered type DataSource). To create the Bean and process the XML, though, some code needs to understand javax.annotation.Resource. The code that understands <ann:Resource> and which generates the DataSource Bean can (and should) be encapsulated and modularized. Nothing in the current spec has that capability, i.e. it's not captured by the Bean concept. To see this, note that <ann:Resource> is currently forbidden by the spec, because it's not annotated by something like @BindingType. In other words, the example is doing something unique beyond the capabilities of the rest of the spec. Or, in a different way, the spec definines the behavior of ann:Resource, and ejb:EJB, not sqlx:DataSource. If the spec defined sqlx:DataSource directly, it would be a Bean, but because you're defining ann:Resource to choose a Bean type for sqlx:DataSource, it's something different. Or, another way, <sqlx:DataSource> is not a simple bean, and the <ann:Resource> specifies what kind of Bean it is. -- Scott