Invalid detection of overridden methods (reopened #3426)

Sorry for the long delay.

Unfortunately, swagger-core 2.2.16 does not yet solve the problem of #3426 . I missed some important stuff in the example parent class: The overridden method is protected which does not find the method when iterating via Class.getMethods(). Also the type variable is bounded, but this should not be a problem.

So this adapted example does not detect overriding properly:

public class Parent<T extends CharSequence> {
  protected T get(String input) {
    return null;
  }
}

@Path("/inheritExample")
public class Resource extends Parent<String> {
  @Override
  @GET
  @Path("/{input}")
  public String get(@PathParam("input") String input) {
    return super.get(input);
  }
}

Again, this only applies to specific Java compilers that produce two methods of similar signature in the same class. I found JDK 11 from Oracle to behave accordingly.

Start by reproducing the Parent and Resource example on Oracle JDK 11, then trace the method-discovery path that handles overridden methods. Done means the protected generic parent method is detected correctly for the annotated public override without breaking other compiler outputs.