kbloader.java

Mandarax是一个规则引擎的纯Java实现。它支持多类型的事实和基于反映的规则

/*
 * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.mandarax.examples.crm;


import java.io.File;
import org.mandarax.kernel.KnowledgeBase;
import org.mandarax.zkb.ZKBManager;

/**
 * Class responsible for loading the knowledge base.
 * In this example, we use ZKB and load the kb from a folder 
 * (alternatively, a zip file could be used as well). 
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 3.4
 */
public class KBLoader  {

    private static KnowledgeBase kb = null;
    public static java.io.File KB_FOLDER = new File("exampledata/crm_example");
    /**
     * Get the sample knowledge base. The knowledge base is hardcoded here,
     * but should actually come from a data source.
     * @return a knowledge base
     */
    public static KnowledgeBase getKB() {
    	if (kb==null) {
	    	try {
	    		kb = new ZKBManager().importKnowledgeBase(KB_FOLDER);
	    		System.out.println("CRM Example kb from " + KB_FOLDER.getAbsolutePath());
	    	}
	    	catch (Exception x) {
	    		System.out.println("Cannot load kb from " + KB_FOLDER.getAbsolutePath());
	    		x.printStackTrace();
	    	}
    	}
    	return kb;
    
    }
}