001/* ActivationGroupID.java --
002   Copyright (c) 1996, 1997, 1998, 1999, 2006 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.rmi.activation;
040
041import java.io.Serializable;
042import java.rmi.server.UID;
043
044/**
045 * This identifier identifies the activation group inside the scope of its
046 * activation system. It also contains (and can provide) the reference to the
047 * groups activation system.
048 *
049 * @see ActivationSystem#registerGroup(ActivationGroupDesc)
050 */
051public class ActivationGroupID
052    implements Serializable
053{
054  /**
055   * Use SVUID for interoperability.
056   */
057  static final long serialVersionUID = - 1648432278909740833L;
058
059  /**
060   * The associated activation system.
061   */
062  final ActivationSystem system;
063
064  /**
065   * The object identifier, making the ID unique.
066   */
067  final UID uid;
068
069  /**
070   * Create the new activation group id in the scope of the given activation
071   * system
072   *
073   * @param aSystem the activation system
074   */
075  public ActivationGroupID(ActivationSystem aSystem)
076  {
077    system = aSystem;
078    uid = new UID();
079  }
080
081  /**
082   * Get the associated activation system
083   *
084   * @return the associated activation system
085   */
086  public ActivationSystem getSystem()
087  {
088    return system;
089  }
090
091  /**
092   * Get the hash code of the associated activation system.
093   */
094  public int hashCode()
095  {
096    return uid.hashCode();
097  }
098
099  /**
100   * Copmare for equality, returns true if the passed object is also the
101   * activation group id and its activation system is the same.
102   */
103  public boolean equals(Object obj)
104  {
105    if (obj instanceof ActivationGroupID)
106      {
107        ActivationGroupID that = (ActivationGroupID) obj;
108        return uid.equals(that.uid);
109      }
110    else
111      return false;
112  }
113
114  /**
115   * Get the string representation
116   */
117  public String toString()
118  {
119    return uid.toString();
120  }
121
122}