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COOS - Connected Objects Operating System (www.connectedobjects.org). Copyright (C) 2009 Telenor ASA and Tellu AS. All rights reserved. DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. This library is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. You may also contact one of the following for additional information: Telenor ASA, Snaroyveien 30, N-1331 Fornebu, Norway (www.telenor.no) Tellu AS, Hagalokkveien 13, N-1383 Asker, Norway (www.tellu.no)
package org.coos.messaging.util;

Author(s):
Knut Eilif Husa, Tellu AS Generator of UUIDs
public class UuidGenerator {
	private static final String UNIQUE_STUB;
	private static int instanceCount;
	private static String hostName;
	private String seed;
	private long sequence;
	public static final String UUID = "UUID-";
	static {
		String stub = "";
		 = "localhost";
		stub = "-1-" + System.currentTimeMillis() + "-";
		 = stub;
	}

Construct an IdGenerator
	public UuidGenerator(String prefix) {
		synchronized () {
			this. = prefix +  + (++) + "-";
		}
	}
	public UuidGenerator() {
		this( + );
	}

As we have to find the hostname as a side-affect of generating a unique stub, we allow it's easy retrevial here

Returns:
the local host name
	public static String getHostName() {
		return ;
	}

Generate a unqiue id

Returns:
a unique id
	public synchronized String generateId() {
		return this. + (this.++);
	}

Generate a unique ID - that is friendly for a URL or file system

Returns:
a unique id
		String result = generateId();
		result = result.replace(':''-');
		result = result.replace('_''-');
		result = result.replace('.''-');
		return result;
	}
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