001 /* ActivationGroupID.java -- 002 Copyright (c) 1996, 1997, 1998, 1999, 2006 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 039 package java.rmi.activation; 040 041 import java.io.Serializable; 042 import 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 */ 051 public 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 }