zkbdriver_2_0.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

package org.mandarax.zkb.framework;

/**
 *  Copyright (C) 1999-2004  Jens Dietrich (mailto:[e-mail])
 *
 *  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
 */


/**
 * ZKB driver. It uses a simpler DTD than the 1_0 driver and therefore facilitates writing
 * kbs directly in xml. On the other hand, it is less similar to RuleML.
 * We keep a version name in the class name since we will maintain
 * drivers in order to migrate data between drivers. New in thisversion is the support for 
 * built-in validation (test cases).
 * @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 final class ZKBDriver_2_0 extends GenericDriver {

	/**
	 * Constructor.
	 */
	public ZKBDriver_2_0() {
	      super();
	      initialize();
	}
	/**
	 * Initialize the object.
	 */
	private void initialize() {
		install(new Adapter4KnowledgeBases_2_0());
		install(new Adapter4Comparators());
		install(new Adapter4Rules_1_1());
		install(new Adapter4Queries_1_1());
		install(new Adapter4Facts_1_1());
		install(new Adapter4SQLClauseSets());
		install(new Adapter4CustomClauseSets());
		install(new Adapter4Prerequisites_1_1());
		install(new Adapter4Predicates());
		install(new Adapter4ComplexTerms());
	    install(new Adapter4ConstantTerms());
	    install(new Adapter4VariableTerms());
		install(new Adapter4Functions()); 	   
		install(new Adapter4DerivationEventListeners());
		install(new Adapter4TestCases_2_0());
	}
    /**
     * Indicates whether the driver (and the underlying xml format (=dtd))
     * supports queries.
     * @return a boolean
     */
    public boolean supportsQueries() {
    	return true;
    }
	/**
	 * Get the location (URL) of the associated DTD.
	 * @return an url
	 */
	public String getURL4DTD() {
		return null; // todo generate dtd and deploy here: "http://www.mandarax.org/dtd/zkb_2_0.dtd";
	}
	/**
	 * Get the name of the driver.
	 * @return a text
	 */
	public String getName() {
		return "ZKBDriver_2_0";
	}
	/**
	 * Get the root element type.
	 * @return the name of the root element
	 */
	public String getRootElementType() {
		return KNOWLEDGE_BASE;
	}
}