libjava/classpath/java/rmi/activation/ActivationGroupID.java

   1 /* ActivationGroupID.java --
   2    Copyright (c) 1996, 1997, 1998, 1999, 2006 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package java.rmi.activation;
  40
  41 import java.io.Serializable;
  42 import java.rmi.server.UID;
  43
  44 /**
  45  * This identifier identifies the activation group inside the scope of its
  46  * activation system. It also contains (and can provide) the reference to the
  47  * groups activation system.
  48  *
  49  * @see ActivationSystem#registerGroup(ActivationGroupDesc)
  50  */
  51 public class ActivationGroupID
  52     implements Serializable
  53 {
  54   /**
  55    * Use SVUID for interoperability.
  56    */
  57   static final long serialVersionUID = - 1648432278909740833L;
  58
  59   /**
  60    * The associated activation system.
  61    */
  62   final ActivationSystem system;
  63
  64   /**
  65    * The object identifier, making the ID unique.
  66    */
  67   final UID uid;
  68
  69   /**
  70    * Create the new activation group id in the scope of the given activation
  71    * system
  72    *
  73    * @param aSystem the activation system
  74    */
  75   public ActivationGroupID(ActivationSystem aSystem)
  76   {
  77     system = aSystem;
  78     uid = new UID();
  79   }
  80
  81   /**
  82    * Get the associated activation system
  83    *
  84    * @return the associated activation system
  85    */
  86   public ActivationSystem getSystem()
  87   {
  88     return system;
  89   }
  90
  91   /**
  92    * Get the hash code of the associated activation system.
  93    */
  94   public int hashCode()
  95   {
  96     return uid.hashCode();
  97   }
  98
  99   /**
 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 }