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)
103: throws ObjectFactoryException {
104: if (o instanceof Date) {
105: final GregorianCalendar gc = new GregorianCalendar();
106: gc.setTime((Date) o);
107: final int year = gc.get(Calendar.YEAR);
108: final int month = gc.get(Calendar.MONTH);
109: final int day = gc.get(Calendar.DAY_OF_MONTH);
110:
111: setParameter("year", new Integer(year));
112: setParameter("month", new Integer(month));
113: setParameter("day", new Integer(day));
114: } else {
115: throw new ObjectFactoryException(
116: "Is no instance of java.util.Date");
117: }
118:
119: }
120: }
|