/* $Id: UUIDManager.java 18552 2010-07-24 05:38:58Z linus $
*******************************************************************************
* Copyright (c) 2009-2010 Contributors - see below
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* mvw
* linus - Linus Tolke
*******************************************************************************
*
* Some portions of this file was previously release using the BSD License:
*/
// Copyright (c) 1996-2006 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies. This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason. IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
package org.argouml.model;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.rmi.server.UID;
/**
* @stereotype singleton
*/
public final class UUIDManager {
////////////////////////////////////////////////////////////////
// static variables
/**
* The singleton instance.
*/
private static final UUIDManager INSTANCE = new UUIDManager();
/**
* The inet address, used in generating UUIDs.
*/
private InetAddress address;
////////////////////////////////////////////////////////////////
// constructors
/**
* Constructor for the UUIDManager. This is private to make sure that
* we are a proper singleton.
*/
private UUIDManager() {
try {
address = InetAddress.getLocalHost();
} catch (UnknownHostException e) {
// The application should have checked for availability at
// startup.
// For tests we would expect unix developers to be correctly
// configured.
// Replace with an assert when we are JRE1.4+
throw new IllegalStateException(
"UnknownHostException caught - set up your /etc/hosts");
}
}
/**
* Return the UUIDManager.
*
* @return an UUIDManager
*/
public static UUIDManager getInstance() {
return INSTANCE;
}
////////////////////////////////////////////////////////////////
// public methods
/**
* @return the new uuid
*/
public synchronized String getNewUUID() {
UID uid = new UID();
StringBuffer s = new StringBuffer();
if (address != null) {
byte[] b = address.getAddress();
for (int i = 0; i < b.length; i++) {
s.append((long) b[i]).append("-");
}
}
s.append(uid.toString());
return s.toString();
}
} /* end class UUIDManager */