    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    }