JAX-RS DynamicFilter not called for sub-resource

Question

JAX-RS DynamicFilter not called for sub-resource

According to the documentation for resources and sub-resources, it should be possible to use DynamicFeature. As an effect, I expect the filter to be registered and called up whenever the endpoint of the subresource is called - i.e. GET /some/sub/x. However, the following does not work for me (and 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";
    }
  }
}

(it is more complex and customizable 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 DynamicFeature, that I would like to register a filter for the resource and sub-resource. In fact, I would expect it to configure()be called also for SubResource, therefore resourceInfo.getResourceClass() == SubResource.class, but it will not be able 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*/));
    }
  }
}