TheoryEvent.java

/*
 * tuProlog - Copyright (C) 2001-2002  aliCE team at deis.unibo.it
 *
 * 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 2.1 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 alice.tuprolog.event;

import alice.tuprolog.Prolog;
import alice.tuprolog.Theory;

/**
 * This class represents events occurring in theory management. 
 *
 * @since 1.3 
 */
public class TheoryEvent extends PrologEvent {

	private static final long serialVersionUID = -4303577074375211756L;
	
	private Theory oldTh;
    private Theory newTh;
    
	public TheoryEvent(Prolog source, Theory oldTh, Theory newTh) {
		super(source);
		this.oldTh = oldTh;
		this.newTh = newTh;
	}

	/**
	 * Gets the old theory
	 * 
	 * @return the old theory
	 */
	public Theory getOldTheory() {
		return oldTh;
	}

	/**
	 * Gets the new theory
	 * 
	 * @return the new theory
	 */
	public Theory getNewTheory() {
		return newTh;
	}

}