The activator calls an instantiator's newInstance method in order to recreate in that group an object with the activation identifier, id, and descriptor, desc. The instantiator is responsible for:

• determining the class for the object using the descriptor's getClassName method,
• loading the class from the code location obtained from the descriptor (using the getLocation method),
• creating an instance of the class by invoking the special "activation" constructor of the object's class that takes two arguments: the object's ActivationID, and the MarshalledObject containing object specific initialization data, and
• returning a MarshalledObject containing the stub for the remote object it created.

In order for activation to be successful, one of the following requirements must be met, otherwise ActivationException is thrown:

• The class to be activated and the special activation constructor are both public, and the class resides in a package that is exported to at least the java.rmi module; or
• The class to be activated resides in a package that is open to at least the java.rmi module.