Geting list of available functions on R/3 (in Java iView)

Hallo,

I'm developing an iView. I'd like to get a list of available functions on specific R/3. Does somebody know how to do it? I think JCO cannot help me (I'm supposed to know the name of function I'd like to call). What about JCA?

Thank you for any advice.

Best Regards,

Josef Motl