DataClient

[Adrian Yan]

Does anyone's DataClient implements an interface of some sort?

[R Bischof]

I changed the Data class to implement the interface DataInterface which defines all public methods of Data. I have a client side class called RMIDataAdapter which implements the same interface and encapsulates the RMI communication with the server.
This way the client may use either the Data class itself or the RMIDataAdapter in the same way, just addressing it through the interface DataInterface. So there is only one row in the DataClient that knows the difference.
Since RMI may throw RmeoteException on every call the RMIDataAdapter transforms these RemoteExceptions into DatabaseExceptions (actually a subclass of DatabaseException that provides detailed information about the original RemoteException).
HTH
Rainer