I have been looking into Gavin's ideas for generic beans, as specified at
, 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
- 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
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)