[weld-dev] Generic Beans

[Pete Muir]

Sorry for the late reply. Got bogged down. Anyway...

Your idea seems about right. I tried out your code, I can't get the test to pass (I get an NPE).

Also, the test case classes don't quite match what I expected. I expected it to look more like:

@Generic(TestAnnotation.class)
public class GenericDep
{
   
   @Inject TestAnnotation data;

   public String getValue()
   {
      return data.value();
   }

}

@Generic(TestAnnotation.class)
public class GenericMain
{
   @Inject
   GenericDep dep;

   public String getValue()
   {
      return dep.getValue();
   }
}

I suggest you add this to weld-extensions, we can then work on getting the tests to pass and the syntax fixed. WDYT?

On 22 Jan 2010, at 09:29, Stuart Douglas wrote:

> <generic-extension.zip>
> I have been looking into Gavin's ideas for generic beans, as specified at http://seamframework.org/Weld/PortableExtensionsPackage, and I have come up with a simple prototype. The details of the implementation is as follows:
> 
> - All AnnotatedTypes marked @Generic are vetoed and their details stored for later use.
> 
> - All beans that have a generic producer field have the details of the Generic annotation value stored
> 
> - after bean discovery a new bean is registered for every @Generic annotation type and every instance of the Generic annotation on a producer field. So in the example on the wiki page six beans would be registed, 3 Topics and 3 sessions, one each for 'default', 'prices' and 'deals'. these beans have a synthetic qualifier annotation added to them that only the PE knows about. Also at this point any @InjectGeneric on the annotated type is replaced with @Inject @SyntheticQualifier(value=?) so that generic beans can inject other generic beans.
> 
> -  The injectionTarget for beans with a generic producer field is wrapped to set the initial value. 
> 
> The prototype contains a simple test, it contains two generic beans, GenericMain and GenericDep, both are generic on TestAnnotation. GenericDep is injected into GenericMain which is then exposed via a producer field in GenericProducer and injected into InjectedBean. GenericDep injects an instance of TestAnnotation as configuration.
> 
> Could someone have a look at this and let me know if this approach is ok? (In order to build it you may need to get the most recent weld-extensions from svn)
> 
> Stuart_______________________________________________
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