001    /**
002     * ===========================================
003     * LibLayout : a free Java layouting library
004     * ===========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/liblayout/
007     *
008     * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     * ------------
026     * $Id: StatefullComponent.java 3044 2007-07-28 17:52:44Z tmorgner $
027     * ------------
028     * (C) Copyright 2006-2007, by Pentaho Corporation.
029     */
030    package org.jfree.layouting;
031    
032    /**
033     * A statefull component creates and consumes State-objects. Instances of the
034     * same type must accept state objects of each other - there should be no hidden
035     * binding between the state objects and their original source.
036     *
037     * @author Thomas Morgner
038     * @see org.jfree.layouting.State
039     */
040    public interface StatefullComponent
041    {
042      public State saveState () throws StateException;
043    }