How can I send a self-defined Java-class object(client) to fit a C++ class (server) by RPC

[luppiterw]

For example:
In server, a function named testClass(CPPClass cc), procedure name is "xxx.xxx"

class CPPClass {
int a;
int b;
int c;
std::vector<double> d;
}

In client, how can I use call(xxx.xxx, ???) to fit the server?
I tried a Java class-object to "???", but failed.
SOS...

[Jopie64]

Just make a serializable java class that matches the c++ class and use an instance of it to call the RPC?