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JCommon is a free general purpose Java class library that is used in several projects at www.jfree.org, including JFreeChart and JFreeReport.
/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* 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 library 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.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ---------------------------------
* rectangle2DObjectDescription.java
* ---------------------------------
* (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: Rectangle2DObjectDescription.java,v 1.3 2005/11/14 11:03:47 mungady Exp $
*
* Changes (from 19-Feb-2003)
* -------------------------
* 19-Feb-2003 : Added standard header and Javadocs (DG);
* 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon
*
*/
package org.jfree.xml.factory.objects;
import java.awt.geom.Rectangle2D;
/**
* An object-description for a Rectangle2D object.
*
* @author Thomas Morgner
*/
public class Rectangle2DObjectDescription extends AbstractObjectDescription {
/**
* Creates a new object description.
*/
public Rectangle2DObjectDescription() {
super(Rectangle2D.class);
setParameterDefinition("width", Float.class);
setParameterDefinition("height", Float.class);
setParameterDefinition("x", Float.class);
setParameterDefinition("y", Float.class);
}
/**
* Creates an object based on this description.
*
* @return The object.
*/
public Object createObject() {
final Rectangle2D rect = new Rectangle2D.Float();
final float w = getFloatParameter("width");
final float h = getFloatParameter("height");
final float x = getFloatParameter("x");
final float y = getFloatParameter("y");
rect.setRect(x, y, w, h);
return rect;
}
/**
* Returns a parameter value as a float.
*
* @param param the parameter name.
*
* @return The float value.
*/
private float getFloatParameter(final String param) {
final Float p = (Float) getParameter(param);
if (p == null) {
return 0;
}
return p.floatValue();
}
/**
* Sets the parameters of this description object to match the supplied object.
*
* @param o the object (should be an instance of Rectangle2D).
*
* @throws ObjectFactoryException if the object is not an instance of Rectangle2D.
*/
public void setParameterFromObject(final Object o) throws ObjectFactoryException {
if (!(o instanceof Rectangle2D)) {
throw new ObjectFactoryException("The given object is no java.awt.geom.Rectangle2D.");
}
final Rectangle2D rect = (Rectangle2D) o;
final float x = (float) rect.getX();
final float y = (float) rect.getY();
final float w = (float) rect.getWidth();
final float h = (float) rect.getHeight();
setParameter("x", new Float(x));
setParameter("y", new Float(y));
setParameter("width", new Float(w));
setParameter("height", new Float(h));
}
}