CNI and interface methods

[Tom Tromey]

>>>>> "Oskar" == Oskar Liljeblad <osk@hem.passagen.se> writes:

Oskar> I read in the CNI documentation that it is not possible to call
Oskar> methods using interface references. Do I have an old egcs/gcj
Oskar> (2.95.2)? If not, any ideas when this will this be possible?

This hasn't changed -- there is no way to directly make a call from
C++ via an interface reference.  As far as I know, nobody is working
on this, so I don't know when it will be possible.

Oskar> Are there any tricks to use meanwhile? I'm experimenting with
Oskar> Gtk bindings using CNI, and using interfaces for signal
Oskar> listeners is (usually) necessary.

Yeah, I like the signal/interface approach too.  Are you generating
the bindings automatically from gtk.def?

Anyway, you can use _Jv_LookupInterfaceMethod to look up the method
via an interface, and then call it directly (you get back a raw
pointer which you can treat as a function pointer; be sure to pass the
object reference as the first argument).  If you do this, though, be
warned that this interface isn't really exported, and we might change
it randomly.

Tom