How to limit the argument size or rmi methods?

Hi,
    I'm programming a server application using jdk 1.5. It connects
with its clients using rmi.
    The rmi methods have parameters of various types, being String and
byte[] some of them.

     First, I don't want an attacker to have the oportunity to invoke
one of these methods with a big parameter,
say 1 GB, and take the bandwidth and the server memory with it.
     Second, I want to constraint the size of specific arguments,
knowing that they are not reasonable if bigger than 1 MB, for
instance.

     I've been searching the web, this list, and the java
documentation, but I could not find any clue of whether or not this is
possible to do.
    Any suggestions?

      Facundo

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