JAX-RS DynamicFilter not being called for sub-reso

Question

According to the documentation it should be possible to use DynamicFeature for resources and sub-resources. As an effect I expect to have filter registered and called whenever sub-resource endpoint is being called - ie GET /some/sub/x. However following is not working for me (nor other similar approaches):

• annotation

  @NameBinding
  @Target({METHOD, TYPE})
  @Retention(RetentionPolicy.RUNTIME)
  public @interface SomeFilterAnn {}
  

• resource

  @SomeFilterAnn
  @Path("/some")
  public class SomeResource {
    @GET
    public String getSome() {
      return "some";
    }
  
    @Path("/sub")
    public SubResource getSub() {
      return new SubResource();
    }
  
    @SomeFilterAnn
    @Path("/x")
    public static class SubResource {
      @GET
      public String getSome() {
        return "sub";
      }
    }
  }
  

• filter (it is actually more complex and configured by DynamicFilter)

  @SomeFilterAnn
  public class SomeFilter implements ContainerRequestFilter {
    private static final Logger LOG = LoggerFactory.getLogger(SomeFilter.class);
  
    @Override
    public void filter(ContainerRequestContext requestContext) throws IOException {
      LOG.info("filter called");
    }
  }
  

• here is DynamicFeature that I'd like to register filter for resource and sub-resource. Actually I would expect that configure() would be called also for SubResource so resourceInfo.getResourceClass() == SubResource.class but cannot manage to achieve this.

  @Provider
  public class SomeDynamicFeature implements DynamicFeature {
    private static final Logger LOG = LoggerFactory.getLogger(SomeDynamicFeature.class);
  
    @Override
    public void configure(ResourceInfo resourceInfo, FeatureContext context) {
      Class<?> resourceClass = resourceInfo.getResourceClass();
  
      // this works
      if (resourceClass == SomeResource.class) {
        LOG.info("register resource filter");
        context.register(new SomeFilter(/*some config*/));
      }
  
      // this does not work (not called for Subresource)
      if (resourceClass == SomeResource.SubResource.class) {
        LOG.info("register resource filter");
        context.register(new SomeFilter(/*some config*/));
      }
  
      // this also does not work (filter not called for Subresource)
      if (resourceInfo.getResourceMethod().getReturnType() == SomeResource.SubResource.class) {
        LOG.info("register subresource filter");
        context.register(new SomeFilter(/*some config*/));
      }
    }
  }
  

I'm running this on WildFly 8.2 with CXF and without Jersey or RESTEasy

EDIT

I have found that annotating SomeFilter with @Provider allows filter to works without need of DynamicFeature however I don't know then how to configure my filter - here is separate question about it.