adapter.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
 */

import org.jdom.Element;
import org.mandarax.kernel.LogicFactory;
import org.mandarax.zkb.ObjectPersistencyService;
import org.mandarax.zkb.ZKBException;

/**
 * An XML adapter specifies how to convert a predicate to an element in the xml
 * document tree, and how to recover it from a (JDOM) element.<br>
 * @see org.jdom.Element
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 2.2
 */
public interface Adapter {
	
	
/**
 * Export an object, i.e., convert it to an element in the DOM.
 * @param obj an object
 * @param driver the generic driver
 * @param ops an object persistency service
 * @exception a ZKBException is thrown if export fails
 */
public abstract Element exportObject(Object obj,GenericDriver driver,ObjectPersistencyService ops) throws  ZKBException ;
/**
 * Build an object from an XML element.
 * @param e an element
 * @param driver the generic driver
 * @param ops an object persistency service
 * @param lfactory the logic factory used to create objects
 * @exception a ZKBException is thrown if import fails
 */
public abstract Object importObject(Element e,GenericDriver driver,ObjectPersistencyService ops,LogicFactory lfactory) throws ZKBException ;
/**
 * Get the name of the associated tag (element).
 * @return a string
 */
public abstract String getTagName();
/**
 * Print the DTD associated with this adapter on a string buffer.
 * @param out the buffer to print on. 
 */
public abstract void printDTD(StringBuffer out) ; 

}