WADL Grammar section lost for generic service class.

[namdets]

I am trying to use a generic base class for my service endpoints so I don't
have to retype the basic getAll, get, put, post, delete handlers every time.
When I do this, the runtime generated WADL shows a blank grammars section.

This is using:

com.fasterxml.jackson artifacts @ 2.5.2
org.apache.cxf artifacts @ 3.0.4
deploying in Tomcat 7

Example:

This generates a WADL with an empty grammars section:

@Transactional
@Consumes("application/json")
@Produces("application/json")
public abstract class AbstractRS<T>{
  @GET
  @Produces("application/json")
  public List<T> getAll(){
     ....
  }
}

@Controller
@Path("/foo")
public class FooRS extends AbstractRS<Foo>{
  ...
}

This generates a WADL with a fully spec'd grammars section if I just pull in
a single method that includes the specified parameter type(Foo) in its
prototype:

@Transactional
@Consumes("application/json")
@Produces("application/json")
public abstract class AbstractRS<T>{
  @GET
  @Produces("application/json")
  public List<T> getAll(){
     ....
  }
}

@Controller
@Path("/foo")
public class FooRS extends AbstractRS<Foo>{
  ...
  
  @GET
  @Produces("application/json")
  public List<Foo> getAll(){
    return super.getAll();
  }
}





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