/* $Id: Visitable.java,v 1.1 2005/08/14 06:48:25 m31 Exp $
 *
 * This file is part of the project "Hilbert II" - http://www.qedeq.org
 *
 * Copyright 2000-2005,  Michael Meyling <mime@qedeq.org>.
 *
 * "Hilbert II" is free software; you can redistribute
 * it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 */

package org.qedeq.kernel.base.elli;

/**
 * Every element which can be visited by an {@link org.qedeq.kernel.base.elli.Visitor} must
 * implement this interface.
 *
 * @see org.qedeq.kernel.base.elli.Visitor
 * @version $Revision: 1.1 $
 * @author  Michael Meyling
 */
public interface Visitable {

    /**
     * The <code>accept()</code> method of an element class calls back the <code>visit()</code>
     * method for its class.
     *
     * @param visitor   Visitor that wants to visit this element.
     */
    public void accept(Visitor visitor);

}