/*
* xtc - The eXTensible Compiler
* Copyright (C) 2007 Robert Grimm
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This library 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 library; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package xtc.util;
/**
* A nonce.
*
* @author Robert Grimm
* @version $Revision: 1.2 $
*/
public class Nonce {
/** The number. */
private final long number;
/**
* Create a new nonce.
*
* @param number The number.
*/
private Nonce(long number) {
this.number = number;
}
/**
* Get this nonce's number.
*
* @return The number.
*/
public long getNumber() {
return number;
}
public String toString() {
return "nonce(" + number + ')';
}
// ========================================================================
/** The current count. */
private static long count = 0;
/**
* Create a new nonce.
*
* @return The new nonce.
*/
public static Nonce create() {
Nonce n = new Nonce(count++);
if (0 == count) throw new AssertionError("Out of nonces");
return n;
}
}