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 * DateObjectDescription.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: DateObjectDescription.java,v 1.4 2005/11/14 11:01:31 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.util.Calendar;
047 import java.util.Date;
048 import java.util.GregorianCalendar;
049
050 /**
051 * An object-description for a <code>Date</code> object.
052 *
053 * @author Thomas Morgner
054 */
055 public class DateObjectDescription extends AbstractObjectDescription {
056
057 /**
058 * Creates a new object description.
059 */
060 public DateObjectDescription() {
061 super(Date.class);
062 setParameterDefinition("year", Integer.class);
063 setParameterDefinition("month", Integer.class);
064 setParameterDefinition("day", Integer.class);
065 }
066
067 /**
068 * Creates an object based on this description.
069 *
070 * @return The object.
071 */
072 public Object createObject() {
073 final int y = getIntParameter("year");
074 final int m = getIntParameter("month");
075 final int d = getIntParameter("day");
076
077 return new GregorianCalendar(y, m, d).getTime();
078 }
079
080 /**
081 * Returns a parameter value as an <code>int</code>.
082 *
083 * @param param the parameter name.
084 *
085 * @return The parameter value.
086 */
087 private int getIntParameter(final String param) {
088 final Integer p = (Integer) getParameter(param);
089 if (p == null) {
090 return 0;
091 }
092 return p.intValue();
093 }
094
095 /**
096 * Sets the parameters of this description object to match the supplied object.
097 *
098 * @param o the object (should be an instance of <code>Date</code>).
099 *
100 * @throws ObjectFactoryException if the object is not an instance of <code>Date</code>.
101 */
102 public void setParameterFromObject(final Object o) throws ObjectFactoryException {
103 if (o instanceof Date) {
104 final GregorianCalendar gc = new GregorianCalendar();
105 gc.setTime((Date) o);
106 final int year = gc.get(Calendar.YEAR);
107 final int month = gc.get(Calendar.MONTH);
108 final int day = gc.get(Calendar.DAY_OF_MONTH);
109
110 setParameter("year", new Integer(year));
111 setParameter("month", new Integer(month));
112 setParameter("day", new Integer(day));
113 }
114 else {
115 throw new ObjectFactoryException("Is no instance of java.util.Date");
116 }
117
118 }
119 }