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     * This interface is a facade for object dispatchers.
027     * Rule containers shall implement this interface.
028     * @author Pavel Vlasov
029     * @revision $Revision$
030     */
031    public interface KnowledgeBase {
032            
033            /**
034             * Adds object to the knowledge base.
035             * @param obj
036             */
037            void add(Object obj);
038            
039            /**
040             * Removes object from the knoledge base
041             * and all conclusions based on this object.
042             * @param obj
043             */
044            void remove(Object obj);
045            
046            /**
047             * Executes rules
048             */
049            void executeRules();
050            
051            /**
052             * Resets rules state (if any).
053             */
054            void reset();
055    
056    }