1. /*

  2.  * @(#)ActivationInstantiator.java	1.14 03/01/23

  3.  *

  4.  * Copyright 2003 Sun Microsystems, Inc. All rights reserved.

  5.  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

  6.  */

  7. 

  8. package java.rmi.activation;

  9. 

  10. import java.rmi.MarshalledObject;

  11. import java.rmi.Remote;

  12. import java.rmi.RemoteException;

  13. 

  14. /**

  15.  * An <code>ActivationInstantiator</code> is responsible for creating

  16.  * instances of "activatable" objects. A concrete subclass of

  17.  * <code>ActivationGroup</code> implements the <code>newInstance</code>

  18.  * method to handle creating objects within the group.

  19.  *

  20.  * @author 	Ann Wollrath

  21.  * @version	1.14, 01/23/03

  22.  * @see 	ActivationGroup

  23.  * @since	1.2

  24.  */

  25. public interface ActivationInstantiator extends Remote {

  26. 

  27.    /**

  28.     * The activator calls an instantiator's <code>newInstance</code>

  29.     * method in order to recreate in that group an object with the

  30.     * activation identifier, <code>id</code>, and descriptor,

  31.     * <code>desc</code>. The instantiator is responsible for: <ul>

  32.     *

  33.     * <li> determining the class for the object using the descriptor's

  34.     * <code>getClassName</code> method,

  35.     *

  36.     * <li> loading the class from the code location obtained from the

  37.     * descriptor (using the <code>getLocation</code> method),

  38.     *

  39.     * <li> creating an instance of the class by invoking the special

  40.     * "activation" constructor of the object's class that takes two

  41.     * arguments: the object's <code>ActivationID</code>, and the

  42.     * <code>MarshalledObject</code> containing object specific

  43.     * initialization data, and

  44.     *

  45.     * <li> returning a MarshalledObject containing the stub for the

  46.     * remote object it created </ul>

  47.     *

  48.     * @param id the object's activation identifier

  49.     * @param desc the object's descriptor

  50.     * @return a marshalled object containing the serialized

  51.     * representation of remote object's stub

  52.     * @exception ActivationException if object activation fails

  53.     * @exception RemoteException if remote call fails

  54.     * @since 1.2

  55.     */

  56.     public MarshalledObject newInstance(ActivationID id, ActivationDesc desc)

  57. 	throws ActivationException, RemoteException;

  58. 

  59. }