How to remotely construct a remote object with RMI

Hello,

I am learning RMI and I ran into this difficulty.

Let's say we have:

import java.rmi.*;

public interface Foo extends Remote {
    public Bar constructBar(String name);
    // other stuff
}

public interface Bar extends Remote {
    public void mutate();
}

---------

import java.rmi.*;
import java.rmi.server.*;

public class BarImpl extends UnicastRemoteObject
                       implements Bar {
    String name;
    public BarImpl(String name) throws RemoteException {
        this.name = name;
    }

    public void mutate() throws RemoteException {
        name = "some new name";
    }
}

---------

import...

public class FooImpl extends UnicastRemoteObject
                implements Foo {

    public FooImpl() throws RemoteException {
        // some init
    }

    public Bar constructBar(String name) throws RemoteException {
        return new BarImpl(name);
    }

    // other stuff

}

----------

Now I have some server and rmi initialization in the main class

----------

import...

public class Server {
    public static void main(String[] args) {

        // Construct Foo implementation, no problem
        FooImpl myFoo = new FooImpl();

        // Construct Bar Implementation
        BarImpl myBar = new BarImpl(// oops, don't have the name,
                                    // the client has it
                                    );

        // So I can bind Foo,
        new InitialContext().bind("rmi:my_foo", myFoo);

       // But can't bind Bar

    }
}

I don't even know how many Bars there will be, and I can't just
serialize Bar and transfer a copy to the client, because I need all Bars
to be remote.

However, if I try to bind in constructBar() method of the Foo class I
get something like this on the client:

java.lang.IllegalArgumentException: illegal remote method encountered:
public abstract void Bar.mutate()

I suppose it's because there is no Bar in the RMI registry yet.

What can I do? I'm sorry if I'm asking nonsense, but how to make a stub
object for this Bar class? Am I doing it completely the wrong way?

I have no problem invoking methods of remote objects instantiated by the
server. That is to say -- if I remove this Bar business, everything else
runs as expected.

I've just started with RMI so (obviously) I don't know anything about it
yet. Can you please tell me is maybe Remote Object Activation right way
to look?

Thanks!