jcckit.graphic.GraphicalElement Maven / Gradle / Ivy
/*
* Copyright 2003-2004, Franz-Josef Elmer, All rights reserved
*
* 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 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 Lesser General Public License for more details
* (http://www.gnu.org/copyleft/lesser.html).
*
* 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 jcckit.graphic;
/**
* Interface all graphical elements have to implement.
* Together with the marker interface {@link Renderer} it
* realizes the Anticyclic Visitor Pattern, a variant of the
* GoF Visitor Pattern. This allows not only to extend JCCKit with
* new renderers but also with new types of GraphicalElements
* without touching existing code.
*
* @author Franz-Josef Elmer
*/
public interface GraphicalElement {
/**
* Renders this element according to the type of renderer.
* Concrete GraphicalElements who are not instances of
* {@link GraphicalComposite} dynamically cast renderer.
* If it does not implement the type of renderer specific for
* the concrete GraphicalElement it should throw an
* IllegalArgumentException.
*/
public abstract void renderWith(Renderer renderer);
}