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 * DoubleDescription.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: DoubleObjectDescription.java,v 1.3 2005/11/14 11:01:56 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 /**
047 * An object-description for a <code>Double</code> object.
048 *
049 * @author Thomas Morgner
050 */
051 public class DoubleObjectDescription extends AbstractObjectDescription {
052
053 /**
054 * Creates a new object description.
055 */
056 public DoubleObjectDescription() {
057 super(Double.class);
058 setParameterDefinition("value", String.class);
059 }
060
061 /**
062 * Creates an object based on this description.
063 *
064 * @return The object.
065 */
066 public Object createObject() {
067 final String o = (String) getParameter("value");
068 return Double.valueOf(o);
069 }
070
071 /**
072 * Sets the parameters of this description object to match the supplied object.
073 *
074 * @param o the object (should be an instance of <code>Double</code>).
075 *
076 * @throws ObjectFactoryException if the object is not an instance of <code>Double</code>.
077 */
078 public void setParameterFromObject(final Object o) throws ObjectFactoryException {
079 if (!(o instanceof Double)) {
080 throw new ObjectFactoryException("The given object is no java.lang.Double.");
081 }
082 setParameter("value", String.valueOf(o));
083 }
084
085 /**
086 * Tests for equality.
087 *
088 * @param o the object to test.
089 *
090 * @return A boolean.
091 */
092 public boolean equals(final Object o) {
093 if (this == o) {
094 return true;
095 }
096 if (!(o instanceof AbstractObjectDescription)) {
097 return false;
098 }
099
100 final AbstractObjectDescription abstractObjectDescription = (AbstractObjectDescription) o;
101
102 if (Double.TYPE.equals(abstractObjectDescription.getObjectClass())) {
103 return true;
104 }
105 if (Double.class.equals(abstractObjectDescription.getObjectClass())) {
106 return true;
107 }
108 return false;
109 }
110
111 /**
112 * Returns a hash code for the object.
113 *
114 * @return The hash code.
115 */
116 public int hashCode() {
117 return getObjectClass().hashCode();
118 }
119
120 }