§4.7.(e) No overriding

Since static methods are not dynamically bound, overriding does not apply in the normal semantics. Regarding callin bindings this has the following consequences (assuming a role RMid played by BMid plus its super-class BSuper and its sub-class BSub.

1. If a static base method BMid.m is bound by a callin binding this has no effect on any method m in BSub.
2. If a callin binding mentions a method m which is not present in BMid but resolves to a static method in BSuper the binding only affects invocations as BMid.m() but not BSuper.m(). If the latter call should be affected, too, the callin binding must appear in a role class bound to BSuper, not BMid.
3. In order to bind two static base methods with equal signatures, one being defined in a sub-class of the other one, two roles have to be defined where one role refines the playedBy clause of the other role (say: public class RSub extends RMid playedBy BSub). Now each role may bind to the static base method accessible in its direct base-class.