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 import javax.rules.Handle; 026 027 /** 028 * Negates object whose handles are equal to handle of the object passed to the constructor. 029 * @author Pavel Vlasov 030 * @revision $Revision$ 031 */ 032 public class ObjectNegator implements Negator { 033 private Handle handle; 034 private HandleManager handleManager; 035 private String message; 036 037 /** 038 * @param manager Handle manager. 039 * @param obj Object to be negated. 040 * @param message Informational message. 041 */ 042 public ObjectNegator(HandleManager manager, Object obj, String message) { 043 super(); 044 handleManager = manager; 045 this.handle = manager.addObject(obj); 046 this.message=message; 047 } 048 049 public boolean negates(Object obj) { 050 return handle.equals(handleManager.addObject(obj)); 051 } 052 053 public String getMessage() { 054 return message; 055 } 056 057 public String toString() { 058 return message; 059 } 060 }