Completely Transparent Proxy

FROM : Philip Mötteli
DATE : Tue Jan 28 04:53:01 2003

Hi


I have a proxy to an object, so that I can do something before and
after every invocation of a method of the proxied object:


- (void)forwardInvocation:(NSInvocation *) anInvocation
{
   // I do some preparing stuff.

   [anInvocation setTarget:proxiedObject];
   [anInvocation invoke];

   // I do some post calling stuff.
}


This is great so far, except, that I can't do the thing, when the
proxied object calls in the invoked method

   [self someMethod];


I can't catch any call to 'self'.

Does anybody know of a way, to redefine 'self'? Or some other way, to
catch the call of '[self someMethod]'?
Eventually by implementing a special kind of fault? So replacing the
'isa' pointer?



Thanks
Phil