    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    }