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
054: AbstractObjectDescription {
055:
056: /**
057: * Creates a new object description.
058: */
059: public DimensionObjectDescription() {
060: super (Dimension.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 Dimension();
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: * 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)
102: throws ObjectFactoryException {
103: if (!(o instanceof Dimension)) {
104: throw new ObjectFactoryException(
105: "The given object is no java.awt.geom.Dimension2D.");
106: }
107:
108: final Dimension dim = (Dimension) o;
109: final float width = (float) dim.getWidth();
110: final float height = (float) dim.getHeight();
111:
112: setParameter("width", new Float(width));
113: setParameter("height", new Float(height));
114: }
115: }
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