import java.util.*;

// This is simple. ROR needs a new object key for each remote object (or its skeleton). 
// This can be done easily, for example by using a counter.
// We also assume a remote object implements only one interface, which is a remote interface.

public class RORtbl
{
    // I omit all instance variables. you can use hash table, for example.
    // The table would have a key by ROR.
    
    // make a new table. 
    public RORtbl()
	{}

    // add a remote object to the table. 
    // Given an object, you can get its class, hence its remote interface.
    // Using it, you can construct a ROR. 
    // The host and port are not used unless it is exported outside.
    // In any way, it is better to have it for uniformity.
    public void addObj(String host, int port, Object o)
	{
	}

    // given ror, find the corresponding object.
    public Object findObj(RemoteObjectRef ror)
	{
	    // if you use a hash table this is easy.
	    return null;
	}
}