Source for org.jfree.xml.factory.objects.Dimension2DObjectDescription

   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:  * Dimension2DObjectDescription.java
  29:  * ---------------------------------
  30:  * (C)opyright 2003, by Thomas Morgner and Contributors.
  31:  *
  32:  * Original Author:  Thomas Morgner;
  33:  * Contributor(s):   David Gilbert (for Object Refinery Limited);
  34:  *
  35:  * $Id: Dimension2DObjectDescription.java,v 1.2 2005/10/18 13:31:58 mungady Exp $
  36:  *
  37:  * Changes 
  38:  * -------
  39:  * 13-Jan-2004 : Initial version
  40:  *  
  41:  */
  42: 
  43: package org.jfree.xml.factory.objects;
  44: 
  45: import java.awt.geom.Dimension2D;
  46: 
  47: import org.jfree.ui.FloatDimension;
  48: 
  49: /**
  50:  * An object-description for a <code>Dimension2D</code> object.
  51:  *
  52:  * @author Thomas Morgner
  53:  */
  54: public class Dimension2DObjectDescription extends AbstractObjectDescription {
  55: 
  56:     /**
  57:      * Creates a new object description.
  58:      */
  59:     public Dimension2DObjectDescription() {
  60:         super(Dimension2D.class);
  61:         setParameterDefinition("width", Float.class);
  62:         setParameterDefinition("height", Float.class);
  63:     }
  64: 
  65:     /**
  66:      * Creates an object based on the description.
  67:      *
  68:      * @return The object.
  69:      */
  70:     public Object createObject() {
  71:         final Dimension2D dim = new FloatDimension();
  72: 
  73:         final float width = getFloatParameter("width");
  74:         final float height = getFloatParameter("height");
  75:         dim.setSize(width, height);
  76:         return dim;
  77:     }
  78: 
  79:     /**
  80:      * Returns a parameter value as a float.
  81:      *
  82:      * @param param  the parameter name.
  83:      *
  84:      * @return The float value.
  85:      */
  86:     private float getFloatParameter(final String param) {
  87:         final Float p = (Float) getParameter(param);
  88:         if (p == null) {
  89:             return 0;
  90:         }
  91:         return p.floatValue();
  92:     }
  93: 
  94: 
  95:     /**
  96:      * Sets the parameters of this description object to match the supplied object.
  97:      *
  98:      * @param o  the object (should be an instance of <code>Dimension2D</code>).
  99:      *
 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: }