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 * rectangle2DObjectDescription.java 029 * --------------------------------- 030 * (C)opyright 2003, 2004, by Thomas Morgner and Contributors. 031 * 032 * Original Author: Thomas Morgner; 033 * Contributor(s): David Gilbert (for Object Refinery Limited); 034 * 035 * $Id: Rectangle2DObjectDescription.java,v 1.3 2005/11/14 11:03:47 mungady Exp $ 036 * 037 * Changes (from 19-Feb-2003) 038 * ------------------------- 039 * 19-Feb-2003 : Added standard header and Javadocs (DG); 040 * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon 041 * 042 */ 043 044package org.jfree.xml.factory.objects; 045 046import java.awt.geom.Rectangle2D; 047 048/** 049 * An object-description for a <code>Rectangle2D</code> object. 050 * 051 * @author Thomas Morgner 052 */ 053public class Rectangle2DObjectDescription extends AbstractObjectDescription { 054 055 /** 056 * Creates a new object description. 057 */ 058 public Rectangle2DObjectDescription() { 059 super(Rectangle2D.class); 060 setParameterDefinition("width", Float.class); 061 setParameterDefinition("height", Float.class); 062 setParameterDefinition("x", Float.class); 063 setParameterDefinition("y", Float.class); 064 } 065 066 /** 067 * Creates an object based on this description. 068 * 069 * @return The object. 070 */ 071 public Object createObject() { 072 final Rectangle2D rect = new Rectangle2D.Float(); 073 074 final float w = getFloatParameter("width"); 075 final float h = getFloatParameter("height"); 076 final float x = getFloatParameter("x"); 077 final float y = getFloatParameter("y"); 078 rect.setRect(x, y, w, h); 079 return rect; 080 } 081 082 /** 083 * Returns a parameter value as a float. 084 * 085 * @param param the parameter name. 086 * 087 * @return The float value. 088 */ 089 private float getFloatParameter(final String param) { 090 final Float p = (Float) getParameter(param); 091 if (p == null) { 092 return 0; 093 } 094 return p.floatValue(); 095 } 096 097 /** 098 * Sets the parameters of this description object to match the supplied object. 099 * 100 * @param o the object (should be an instance of <code>Rectangle2D</code>). 101 * 102 * @throws ObjectFactoryException if the object is not an instance of <code>Rectangle2D</code>. 103 */ 104 public void setParameterFromObject(final Object o) throws ObjectFactoryException { 105 if (!(o instanceof Rectangle2D)) { 106 throw new ObjectFactoryException("The given object is no java.awt.geom.Rectangle2D."); 107 } 108 109 final Rectangle2D rect = (Rectangle2D) o; 110 final float x = (float) rect.getX(); 111 final float y = (float) rect.getY(); 112 final float w = (float) rect.getWidth(); 113 final float h = (float) rect.getHeight(); 114 115 setParameter("x", new Float(x)); 116 setParameter("y", new Float(y)); 117 setParameter("width", new Float(w)); 118 setParameter("height", new Float(h)); 119 } 120 121}