Mega Code Archive
A unique identifier
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/*
* This file is part of the Echo Web Application Framework (hereinafter "Echo").
* Copyright (C) 2002-2009 NextApp, Inc.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*/
/**
* A unique identifier.
*/
public class Uid {
private static final String machineIdString = Integer.toHexString(new Object().hashCode());
private static int globalCount = 0;
private final int count = ++globalCount;
private final long time = System.currentTimeMillis();
/**
* Generates a new identifier String.
*/
public static final String generateUidString() {
String idString = new Uid().toString();
return idString;
}
/**
* Generates a new identifier.
*/
private Uid() {
super();
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
String timeString = Long.toHexString(time);
String countString = Integer.toHexString(count);
return machineIdString + "_" + timeString + "_" + countString;
}
}
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