access of boxobject inside a patcher through java instance

Hi

is there an elegant way to get a java-instance of an already existing max/jitter/whatever - object in a patcher (lets assume where the mxj-object created aswell)?

I found a way via MaxPatcher to get a MaxBox instance, but there is no elegant way to query the object - like the call() function or the getAttr() functions - though it is fairly easy to send messages to it.

cheers