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: * Point2DObjectDescription.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: Point2DObjectDescription.java,v 1.3 2005/11/14 11:03:35 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.Point2D;
047:
048: /**
049: * An object-description for a <code>Point2D</code> object.
050: *
051: * @author Thomas Morgner
052: */
053: public class Point2DObjectDescription extends AbstractObjectDescription {
054:
055: /**
056: * Creates a new object description.
057: */
058: public Point2DObjectDescription() {
059: super (Point2D.class);
060: setParameterDefinition("x", Float.class);
061: setParameterDefinition("y", Float.class);
062: }
063:
064: /**
065: * Creates an object based on this description.
066: *
067: * @return The object.
068: */
069: public Object createObject() {
070: final Point2D point = new Point2D.Float();
071:
072: final float x = getFloatParameter("x");
073: final float y = getFloatParameter("y");
074: point.setLocation(x, y);
075: return point;
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: * Sets the parameters of this description object to match the supplied object.
095: *
096: * @param o the object (should be an instance of <code>Point2D</code>).
097: *
098: * @throws ObjectFactoryException if the object is not an instance of <code>Point2D</code>.
099: */
100: public void setParameterFromObject(final Object o)
101: throws ObjectFactoryException {
102: if (!(o instanceof Point2D)) {
103: throw new ObjectFactoryException(
104: "The given object is no java.awt.geom.Point2D.");
105: }
106:
107: final Point2D point = (Point2D) o;
108: final float x = (float) point.getX();
109: final float y = (float) point.getY();
110:
111: setParameter("x", new Float(x));
112: setParameter("y", new Float(y));
113: }
114: }
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