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1: /* ======================================================================== 2: * JCommon : a free general purpose class library for the Java(tm) platform 3: * ======================================================================== 4: * 5: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jcommon/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ---------------------------- 28: * Line2DObjectDescription.java 29: * ---------------------------- 30: * (C)opyright 2003, 2004, by Thomas Morgner and Contributors. 31: * 32: * Original Author: Thomas Morgner; 33: * Contributor(s): David Gilbert (for Object Refinery Limited); 34: * 35: * $Id: Line2DObjectDescription.java,v 1.3 2005/11/14 11:02:46 mungady Exp $ 36: * 37: * Changes (from 19-Feb-2003) 38: * ------------------------- 39: * 19-Feb-2003 : Added standard header and Javadocs (DG); 40: * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon 41: * 42: */ 43: 44: package org.jfree.xml.factory.objects; 45: 46: import java.awt.geom.Line2D; 47: 48: /** 49: * An object-description for a <code>Line2D</code> object. 50: * 51: * @author Thomas Morgner 52: */ 53: public class Line2DObjectDescription extends AbstractObjectDescription { 54: 55: /** 56: * Creates a new object description. 57: */ 58: public Line2DObjectDescription() { 59: super(Line2D.class); 60: setParameterDefinition("x1", Float.class); 61: setParameterDefinition("x2", Float.class); 62: setParameterDefinition("y1", Float.class); 63: setParameterDefinition("y2", Float.class); 64: } 65: 66: /** 67: * Creates an object based on this description. 68: * 69: * @return The object. 70: */ 71: public Object createObject() { 72: final Line2D line = new Line2D.Float(); 73: 74: final float x1 = getFloatParameter("x1"); 75: final float x2 = getFloatParameter("x2"); 76: final float y1 = getFloatParameter("y1"); 77: final float y2 = getFloatParameter("y2"); 78: line.setLine(x1, y1, x2, y2); 79: return line; 80: } 81: 82: /** 83: * Returns a parameter value as a float. 84: * 85: * @param param the parameter name. 86: * 87: * @return The float value. 88: */ 89: private float getFloatParameter(final String param) { 90: final Float p = (Float) getParameter(param); 91: if (p == null) { 92: return 0; 93: } 94: return p.floatValue(); 95: } 96: 97: /** 98: * Sets the parameters of this description object to match the supplied object. 99: * 100: * @param o the object (should be an instance of <code>Line2D</code>). 101: * 102: * @throws ObjectFactoryException if the object is not an instance of <code>Line2D</code>. 103: */ 104: public void setParameterFromObject(final Object o) throws ObjectFactoryException { 105: if (!(o instanceof Line2D)) { 106: throw new ObjectFactoryException("The given object is no java.awt.geom.Line2D."); 107: } 108: final Line2D line = (Line2D) o; 109: final float x1 = (float) line.getX1(); 110: final float x2 = (float) line.getX2(); 111: final float y1 = (float) line.getY1(); 112: final float y2 = (float) line.getY2(); 113: 114: setParameter("x1", new Float(x1)); 115: setParameter("x2", new Float(x2)); 116: setParameter("y1", new Float(y1)); 117: setParameter("y2", new Float(y2)); 118: } 119: }