001    /*
002     * hammurapi-rules-tutorial @mesopotamia.version@
003     * Hammurapi rules tutorial. 
004     * Copyright (C) 2006  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.tutorial.conclusions;
024    
025    import biz.hammurapi.rules.Negator;
026    
027    /**
028     * Negates bad facts. Uses equals() to compare facts.
029     * @author Pavel Vlasov
030     * @revision $Revision$
031     */
032    public class BadFact implements Negator {
033            String message;
034            private Object fact;
035    
036            public BadFact(Object obj, String message) {
037                    this.message=message;
038                    this.fact=obj;
039            }
040    
041            public boolean negates(Object obj) {
042                    return fact.equals(obj);
043            }
044            
045            public String toString() {
046                    return "[BAD FACT] "+message+": "+fact;
047            }
048    
049    }