001 /* 002 * hammurapi-rules @mesopotamia.version@ 003 * Hammurapi rules engine. 004 * Copyright (C) 2005 Hammurapi Group 005 * 006 * This program is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 2 of the License, or (at your option) any later version. 010 * 011 * This program is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public 017 * License along with this library; if not, write to the Free Software 018 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 019 * 020 * URL: http://http://www.hammurapi.biz 021 * e-Mail: support@hammurapi.biz 022 */ 023 package biz.hammurapi.rules; 024 025 /** 026 * Negates the object passed to the constructor. Uses == to compare identity. 027 * @author Pavel Vlasov 028 * @revision $Revision$ 029 */ 030 public class IdentityNegator implements Negator { 031 032 private String msg; 033 private Object obj; 034 035 /** 036 * @param obj Object to be negated. 037 */ 038 public IdentityNegator(Object obj) { 039 super(); 040 this.obj=obj; 041 } 042 043 /** 044 * @param obj Object to be negated. 045 * @param msg Message why the object was negated. 046 */ 047 public IdentityNegator(Object obj, String msg) { 048 this(obj); 049 this.msg=msg; 050 } 051 052 public boolean negates(Object obj) { 053 return this.obj == obj; 054 } 055 056 /** 057 * @return Message why object was negated. 058 */ 059 public String getMessage() { 060 return msg; 061 } 062 }