Fake documentation/code generator or rewriter

This is a serious question, but the intent is not very serious; it's act开发者_如何学JAVAually a joke I wanted to play on someone and while thinking about it I got quite interested.

Everyone knows http://pdos.csail.mit.edu/scigen/ I suppose: i was wondering ; is there any kind of code + documentation generator? Something which generates 'plausible' looking (doesn't even have to work) Java code and code documentation for instance?

Seems like a very interesting project to me and I couldn't find anything on Google. Does something like this exist?

Edit: something which would refactor a codebase beyond recognition would be good too; kind of a Markov chain for programming.

Well you could try Mechanical Turk if you have a budget for your practical joke. If you are more into an automated solution, a dissociated press type of algorithm would work. Call me old fashioned, but I prefer the real thing to what these previous two methods could do.