Re: [weld-dev] Generic Beans
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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