CallSite constructor first argument not a class?

[Emmanuel Castro]

I realize that the first argument of the CallSite constructor

       public CallSite(Object caller, String name, MethodType type)

is not typed as a Class. However, when one uses it it a bootstrap
method, it must be a Class (it is checked in sun.dyn.CallSiteImpl.makeSite()).

What is the ideas behind that. When would it be safe (and usefull) to use some
of argument type?

Merci de vos réponses

Manu