content: /* ========================================================================
   * JCommon : a free general purpose class library for the Java(tm) platform
   * ========================================================================
   *
   * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   * 
   * Project Info:  http://www.jfree.org/jcommon/index.html
   *
   * This library is free software; you can redistribute it and/or modify it 
   * under the terms of the GNU Lesser General Public License as published by 
   * the Free Software Foundation; either version 2.1 of the License, or 
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but 
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
   * USA.  
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
   * in the United States and other countries.]
   * 
   * --------------------------
   * DateObjectDescription.java
   * --------------------------
   * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
   *
   * Original Author:  Thomas Morgner;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * $Id: DateObjectDescription.java,v 1.4 2005/11/14 11:01:31 mungady Exp $
   *
   * Changes (from 19-Feb-2003)
   * -------------------------
   * 19-Feb-2003 : Added standard header and Javadocs (DG);
   * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon
   *
   */
  
  package org.jfree.xml.factory.objects;
  
  import java.util.Calendar;
  import java.util.Date;
  import java.util.GregorianCalendar;
  
  /**
   * An object-description for a <code>Date</code> object.
   *
   * @author Thomas Morgner
   */
  public class DateObjectDescription extends AbstractObjectDescription {
  
      /**
       * Creates a new object description.
       */
      public DateObjectDescription() {
          super(Date.class);
          setParameterDefinition("year", Integer.class);
          setParameterDefinition("month", Integer.class);
          setParameterDefinition("day", Integer.class);
      }
  
      /**
       * Creates an object based on this description.
       *
       * @return The object.
       */
      public Object createObject() {
          final int y = getIntParameter("year");
          final int m = getIntParameter("month");
          final int d = getIntParameter("day");
  
          return new GregorianCalendar(y, m, d).getTime();
      }
  
      /**
       * Returns a parameter value as an <code>int</code>.
       *
       * @param param  the parameter name.
       *
       * @return The parameter value.
       */
      private int getIntParameter(final String param) {
          final Integer p = (Integer) getParameter(param);
          if (p == null) {
              return 0;
          }
          return p.intValue();
      }
  
      /**
       * Sets the parameters of this description object to match the supplied object.
       *
       * @param o  the object (should be an instance of <code>Date</code>).
       *
       * @throws ObjectFactoryException if the object is not an instance of <code>Date</code>.
       */
      public void setParameterFromObject(final Object o) throws ObjectFactoryException {
          if (o instanceof Date) {
              final GregorianCalendar gc = new GregorianCalendar();
              gc.setTime((Date) o);
              final int year = gc.get(Calendar.YEAR);
              final int month = gc.get(Calendar.MONTH);
              final int day = gc.get(Calendar.DAY_OF_MONTH);
  
              setParameter("year", new Integer(year));
              setParameter("month", new Integer(month));
              setParameter("day", new Integer(day));
          }
          else {
              throw new ObjectFactoryException("Is no instance of java.util.Date");
          }
  
      }
  }
  