    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     * DimensionObjectDescription.java
    029     * -------------------------------
    030     * (C)opyright 2004, by Thomas Morgner and Contributors.
    031     *
    032     * Original Author:  Thomas Morgner;
    033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
    034     *
    035     * $Id: DimensionObjectDescription.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.Dimension;
    046    import java.awt.geom.Dimension2D;
    047
    048    /**
    049     * An object-description for a <code>java.awt.Dimension</code> object.
    050     *
    051     * @author Thomas Morgner
    052     */
    053    public class DimensionObjectDescription extends AbstractObjectDescription {
    054
    055        /**
    056         * Creates a new object description.
    057         */
    058        public DimensionObjectDescription() {
    059            super(Dimension.class);
    060            setParameterDefinition("width", Float.class);
    061            setParameterDefinition("height", Float.class);
    062        }
    063
    064        /**
    065         * Creates an object based on the description.
    066         *
    067         * @return The object.
    068         */
    069        public Object createObject() {
    070            final Dimension2D dim = new Dimension();
    071
    072            final float width = getFloatParameter("width");
    073            final float height = getFloatParameter("height");
    074            dim.setSize(width, height);
    075            return dim;
    076        }
    077
    078        /**
    079         * Returns a parameter value as a float.
    080         *
    081         * @param param  the parameter name.
    082         *
    083         * @return The float value.
    084         */
    085        private float getFloatParameter(final String param) {
    086            final Float p = (Float) getParameter(param);
    087            if (p == null) {
    088                return 0;
    089            }
    090            return p.floatValue();
    091        }
    092
    093
    094        /**
    095         * Sets the parameters of this description object to match the supplied object.
    096         *
    097         * @param o  the object (should be an instance of <code>Dimension2D</code>).
    098         *
    099         * @throws ObjectFactoryException if the object is not an instance of <code>Point2D</code>.
    100         */
    101        public void setParameterFromObject(final Object o) throws ObjectFactoryException {
    102            if (!(o instanceof Dimension)) {
    103                throw new ObjectFactoryException("The given object is no java.awt.geom.Dimension2D.");
    104            }
    105
    106            final Dimension dim = (Dimension) o;
    107            final float width = (float) dim.getWidth();
    108            final float height = (float) dim.getHeight();
    109
    110            setParameter("width", new Float(width));
    111            setParameter("height", new Float(height));
    112        }
    113    }