001 /* ========================================================================
002 * JCommon : a free general purpose class library for the Java(tm) platform
003 * ========================================================================
004 *
005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006 *
007 * Project Info: http://www.jfree.org/jcommon/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * ---------------------------------
028 * Dimension2DObjectDescription.java
029 * ---------------------------------
030 * (C)opyright 2003, by Thomas Morgner and Contributors.
031 *
032 * Original Author: Thomas Morgner;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 *
035 * $Id: Dimension2DObjectDescription.java,v 1.2 2005/10/18 13:31:58 mungady Exp $
036 *
037 * Changes
038 * -------
039 * 13-Jan-2004 : Initial version
040 *
041 */
042
043 package org.jfree.xml.factory.objects;
044
045 import java.awt.geom.Dimension2D;
046
047 import org.jfree.ui.FloatDimension;
048
049 /**
050 * An object-description for a <code>Dimension2D</code> object.
051 *
052 * @author Thomas Morgner
053 */
054 public class Dimension2DObjectDescription extends AbstractObjectDescription {
055
056 /**
057 * Creates a new object description.
058 */
059 public Dimension2DObjectDescription() {
060 super(Dimension2D.class);
061 setParameterDefinition("width", Float.class);
062 setParameterDefinition("height", Float.class);
063 }
064
065 /**
066 * Creates an object based on the description.
067 *
068 * @return The object.
069 */
070 public Object createObject() {
071 final Dimension2D dim = new FloatDimension();
072
073 final float width = getFloatParameter("width");
074 final float height = getFloatParameter("height");
075 dim.setSize(width, height);
076 return dim;
077 }
078
079 /**
080 * Returns a parameter value as a float.
081 *
082 * @param param the parameter name.
083 *
084 * @return The float value.
085 */
086 private float getFloatParameter(final String param) {
087 final Float p = (Float) getParameter(param);
088 if (p == null) {
089 return 0;
090 }
091 return p.floatValue();
092 }
093
094
095 /**
096 * Sets the parameters of this description object to match the supplied object.
097 *
098 * @param o the object (should be an instance of <code>Dimension2D</code>).
099 *
100 * @throws ObjectFactoryException if the object is not an instance of <code>Point2D</code>.
101 */
102 public void setParameterFromObject(final Object o) throws ObjectFactoryException {
103 if (!(o instanceof Dimension2D)) {
104 throw new ObjectFactoryException("The given object is no java.awt.geom.Dimension2D.");
105 }
106
107 final Dimension2D dim = (Dimension2D) o;
108 final float width = (float) dim.getWidth();
109 final float height = (float) dim.getHeight();
110
111 setParameter("width", new Float(width));
112 setParameter("height", new Float(height));
113 }
114 }