Jvm question

Question

Hi. Let's say I have two computers, "apple" and "orange". They are both running the same java program called "synchronize", which is installed on both computers, and they communicate with eachother via RMI.
synchronize has two classes called "ClassA", and "NetPackage"... NetPackage is the object which is passed around on the net via RMI. NetPackage has a method called "getVersion", which has as method body "return ClassA.getVersion()", essentially a link.
If "apple" is calling NetPackage.getVersion(), then I know that I will get the version as defined in apple's jvm. However, what happens if orange gets a NetPackage from apples jvm, and from within orange's jvm we ask that remote NetPackage to getVersion(). Can I assume that this call gets sent back through the remote object to apple's jvm, which returns the version as defined in apples jvm, or does the remote object, because it is now executing in oranges jvm, return the version as defined in oranges jvm?
I hope I made my question clear enough, but I don't know any other way of describing my problem.
Thanks in advance for your help.

Answer 1

"...NetPackage is the object which is passed around on the net via RMI." is somewhat vague - because a cleint can retrieve either a copy of an object, or a reference to a remote object.
This depends on how the object is defined: If it is derived from UnicastRemoteObject, then it is a remote reference; otherwise a copy must have been serialized .
With respect to the "link":
o For a Unicast remote object, the method invocation will cause a call on the remote objects method, which will in turn access the other remote object.
o For a serialized object, the other object better be serializable too, in which case both objects should exist on the client computer.