001 /** 002 * ======================================== 003 * JFreeReport : a free Java report library 004 * ======================================== 005 * 006 * Project Info: http://reporting.pentaho.org/ 007 * 008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 009 * 010 * This library is free software; you can redistribute it and/or modify it under the terms 011 * of the GNU Lesser General Public License as published by the Free Software Foundation; 012 * either version 2.1 of the License, or (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 016 * See the GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public License along with this 019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 020 * Boston, MA 02111-1307, USA. 021 * 022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 023 * in the United States and other countries.] 024 * 025 * ------------ 026 * $Id: InstanceID.java 2725 2007-04-01 18:49:29Z taqua $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 032 package org.jfree.report.util; 033 034 import java.io.Serializable; 035 036 /** 037 * This class can be used as ID to mark instances of objects. This allows to track and 038 * identify objects and their clones. 039 * 040 * @author Thomas Morgner 041 */ 042 public final class InstanceID implements Serializable 043 { 044 /** 045 * DefaultConstructor. 046 */ 047 public InstanceID () 048 { 049 } 050 051 /** 052 * Returns a simple string representation of this object to make is identifiable by 053 * human users. 054 * 055 * @return the string representation. 056 */ 057 public String toString () 058 { 059 return "InstanceID[" + hashCode() + "]"; 060 } 061 }