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: * rectangle2DObjectDescription.java
029: * ---------------------------------
030: * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
031: *
032: * Original Author: Thomas Morgner;
033: * Contributor(s): David Gilbert (for Object Refinery Limited);
034: *
035: * $Id: Rectangle2DObjectDescription.java,v 1.3 2005/11/14 11:03:47 mungady Exp $
036: *
037: * Changes (from 19-Feb-2003)
038: * -------------------------
039: * 19-Feb-2003 : Added standard header and Javadocs (DG);
040: * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon
041: *
042: */
043:
044: package org.jfree.xml.factory.objects;
045:
046: import java.awt.geom.Rectangle2D;
047:
048: /**
049: * An object-description for a <code>Rectangle2D</code> object.
050: *
051: * @author Thomas Morgner
052: */
053: public class Rectangle2DObjectDescription extends
054: AbstractObjectDescription {
055:
056: /**
057: * Creates a new object description.
058: */
059: public Rectangle2DObjectDescription() {
060: super (Rectangle2D.class);
061: setParameterDefinition("width", Float.class);
062: setParameterDefinition("height", Float.class);
063: setParameterDefinition("x", Float.class);
064: setParameterDefinition("y", Float.class);
065: }
066:
067: /**
068: * Creates an object based on this description.
069: *
070: * @return The object.
071: */
072: public Object createObject() {
073: final Rectangle2D rect = new Rectangle2D.Float();
074:
075: final float w = getFloatParameter("width");
076: final float h = getFloatParameter("height");
077: final float x = getFloatParameter("x");
078: final float y = getFloatParameter("y");
079: rect.setRect(x, y, w, h);
080: return rect;
081: }
082:
083: /**
084: * Returns a parameter value as a float.
085: *
086: * @param param the parameter name.
087: *
088: * @return The float value.
089: */
090: private float getFloatParameter(final String param) {
091: final Float p = (Float) getParameter(param);
092: if (p == null) {
093: return 0;
094: }
095: return p.floatValue();
096: }
097:
098: /**
099: * Sets the parameters of this description object to match the supplied object.
100: *
101: * @param o the object (should be an instance of <code>Rectangle2D</code>).
102: *
103: * @throws ObjectFactoryException if the object is not an instance of <code>Rectangle2D</code>.
104: */
105: public void setParameterFromObject(final Object o)
106: throws ObjectFactoryException {
107: if (!(o instanceof Rectangle2D)) {
108: throw new ObjectFactoryException(
109: "The given object is no java.awt.geom.Rectangle2D.");
110: }
111:
112: final Rectangle2D rect = (Rectangle2D) o;
113: final float x = (float) rect.getX();
114: final float y = (float) rect.getY();
115: final float w = (float) rect.getWidth();
116: final float h = (float) rect.getHeight();
117:
118: setParameter("x", new Float(x));
119: setParameter("y", new Float(y));
120: setParameter("width", new Float(w));
121: setParameter("height", new Float(h));
122: }
123:
124: }
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