001    /**
002     * ========================================
003     * JFreeReport : a free Java report library
004     * ========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/
007     *
008     * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     * ------------
026     * $Id: ClassValueConverter.java 3048 2007-07-28 18:02:42Z tmorgner $
027     * ------------
028     * (C) Copyright 2000-2005, by Object Refinery Limited.
029     * (C) Copyright 2005-2007, by Pentaho Corporation.
030     */
031    package org.jfree.report.util.beans;
032    
033    import org.jfree.util.ObjectUtilities;
034    
035    /**
036     * A class that handles the conversion of {@link Integer} attributes to and from their
037     * {@link String} representation.
038     *
039     * @author Thomas Morgner
040     */
041    public class ClassValueConverter implements ValueConverter
042    {
043      public ClassValueConverter ()
044      {
045      }
046    
047      public String toAttributeValue (final Object o)
048      {
049        if (o instanceof Class)
050        {
051          final Class c = (Class) o;
052          return c.getName();
053        }
054        throw new ClassCastException("Give me a real type.");
055      }
056    
057      public Object toPropertyValue (final String s)
058      {
059        try
060        {
061          final ClassLoader loader = ObjectUtilities.getClassLoader(ClassValueConverter.class);
062          return loader.loadClass(s);
063        }
064        catch (ClassNotFoundException e)
065        {
066          throw new IllegalArgumentException("No such class.");
067        }
068      }
069    }