Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/model/UUIDManager.java
// $Id: UUIDManager.java 10734 2006-06-11 15:43:58Z mvw $
// 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
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// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
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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((new Byte(b[i])).longValue()).append("-");
	    }
	}
	s.append(uid.toString());
	return s.toString();
    }
} /* end class UUIDManager */
