1 /* 2 Copyright (c) 1996, 1997, 1998, 1999 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., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307 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 package java.rmi.dgc; 39 40 import java.io.Serializable; 41 import java.net.InetAddress; 42 import java.net.UnknownHostException; 43 import java.rmi.server.UID; 44 45 public final class VMID implements Serializable 46 { 47 static final long serialVersionUID = -538642295484486218L; 48 49 static final boolean areWeUnique; 50 51 static byte[] localAddr; 52 53 private byte[] addr; 54 55 private UID uid; 56 57 static 58 { 59 byte[] addr; 60 boolean awu = true; 61 try { 62 addr = InetAddress.getLocalHost().getAddress(); 63 if (addr[0] == 127 && addr[1] == 0 && addr[2] == 0 && addr[3] == 1) { 64 awu = false; 65 } 66 } 67 catch (UnknownHostException _) { 68 addr = new byte[]{ 127, 0, 0, 1 }; 69 awu = false; 70 } 71 localAddr = addr; 72 areWeUnique = awu; 73 } 74 VMID()75 public VMID() 76 { 77 addr = localAddr; 78 uid = new UID(); 79 } 80 81 /** 82 * @deprecated 83 */ isUnique()84 public static boolean isUnique () 85 { 86 return areWeUnique; 87 } 88 hashCode()89 public int hashCode () 90 { 91 return super.hashCode(); 92 } 93 equals(Object obj)94 public boolean equals (Object obj) 95 { 96 if (!(obj instanceof VMID)) 97 { 98 return false; 99 } 100 101 VMID other = (VMID) obj; 102 if (addr.length != other.addr.length) 103 { 104 return false; 105 } 106 107 for (int i = addr.length - 1; i >= 0; i--) 108 { 109 if (addr[i] != other.addr[i]) 110 { 111 return false; 112 } 113 } 114 115 return uid.equals(other.uid); 116 } 117 toString()118 public String toString () 119 { 120 StringBuffer buf = new StringBuffer ("[VMID: "); 121 122 for (int i = 0; i < addr.length; i++) 123 { 124 if (i > 0) 125 { 126 buf.append ("."); 127 } 128 129 buf.append (Integer.toString (addr [i])); 130 } 131 132 buf.append (" "); 133 buf.append (uid.toString ()); 134 buf.append ("]"); 135 136 return buf.toString(); 137 } 138 } 139