Re: [jboss-dev] Way to scan for classes that extend or implement
No, not annotation on anntation. Please look at the example below again.
JAX-RS services are identified via the @Path annotation, just like EJB's
are identified with @Stateless or @Stateful.
The different is that the @Path annotation can either be on the class,
or an implemented interface.
This does not exist in the scanner framework ATM, AFAICT.
Ales Justin wrote:
You can already do this with existing indexes.
AnnIndex ai = ...;
Set<Class> annClasses = ai.classHasAnnotation(Path.class.getName());
HierarchyIndex hi = ...;
for (Class annClass : annClasses)
{
Set<Class> hieClasses - hi.getSuperTypes(annClass);
...
}
Actually, you're in contradiction here:
* "classes that implement anntotations that are annotated with"
* MyResource is not an annotation
For "annotation on annotation" one could simply use the AI twice.
On Jun 14, 2010, at 3:43 PM, Bill Burke wrote:
> I also have written a scanner plugin that indexes classes that implement
> anntotations that are annotated with:
>
> i.e.
>
> @Path
> public interface MyResource {}
>
> public class MyResourceImpl implements MyResource {}
>
>
> Set<String> classes =
> interfaceIndex.getAnntoationIndex(Path.class.getName())
>
>
>
> Ales Justin wrote:
>> I've fixed this in scanning trunk, so you don't need the url anymore.
>> If null, the whole deployment unit's owning classpath will be checked.
>>
>> For the moment you can use the scanning trunk's snapshot - the api is still
the same,
>> and I'll try to do new release asap -- need to fix some CL & Deployers
issue before doing the whole cycle.
>>
>>
>> On Jun 11, 2010, at 10:46 PM, Rémy Maucherat wrote:
>>
>>> On Fri, Jun 11, 2010 at 5:35 PM, Bill Burke <bburke(a)redhat.com> wrote:
>>>> Hmmm, where you get the classpathItem from then? AnnotationIndex
>>>> doesn't require for you to provide this info.
>>> It's just a regular VirtualFile to the JAR or exploded folder. For the
>>> classpath you could do:
>>> List<VirtualFile> classpath = (VFSDeploymentUnit) unit.getClassPath();
>>>
>>> Rémy
>>>
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>>
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> Bill Burke
> JBoss, a division of Red Hat
> http://bill.burkecentral.com
>
>
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