001 /* 002 Copyright (C) 2003 <laurent@aopsys.com> 003 004 This program is free software; you can redistribute it and/or modify 005 it under the terms of the GNU Lesser General Public License as 006 published by the Free Software Foundation; either version 2 of the 007 License, or (at your option) any later version. 008 009 This program is distributed in the hope that it will be useful, 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 012 GNU Lesser General Public License for more details. 013 014 You should have received a copy of the GNU Lesser General Public License 015 along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ 017 018 package org.objectweb.jac.aspects.idGen; 019 020 import java.util.Hashtable; 021 import java.util.Map; 022 023 /** 024 * Stores counters 025 */ 026 027 public class Counters { 028 029 public Counters() { 030 } 031 032 /** 033 * Generate an ID 034 * @param name counter name to use to generate the ID 035 */ 036 public synchronized long genId(String name) { 037 Long n = (Long)counters.get(name); 038 if (n==null) { 039 n = new Long(1); 040 } 041 long res = n.longValue(); 042 counters.put(name,new Long(res+1)); 043 return res; 044 } 045 046 Map counters = new Hashtable(); 047 }