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 * IntegerAttributeHandler.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: IntegerAttributeHandler.java,v 1.2 2005/10/18 13:30:16 mungady Exp $
036 *
037 * Changes
038 * -------
039 * 24.09.2003 : Initial version
040 *
041 */
042
043package org.jfree.xml.attributehandlers;
044
045import org.jfree.util.Log;
046
047/**
048 * A class that handles the conversion of {@link Integer} attributes to and from an appropriate
049 * {@link String} representation.
050 */
051public class IntegerAttributeHandler implements AttributeHandler {
052
053    /**
054     * Creates a new attribute handler.
055     */
056    public IntegerAttributeHandler() {
057        super();
058    }
059
060    /**
061     * Converts the attribute to a string.
062     *
063     * @param o  the attribute ({@link Integer} expected).
064     * 
065     * @return A string representing the integer value.
066     */
067    public String toAttributeValue(final Object o) {
068        try {
069            final Integer in = (Integer) o;
070            return in.toString();
071        }
072        catch (ClassCastException cce) {
073            if (o != null) {
074                Log.debug("ClassCastException: Expected Integer, found " + o.getClass());
075            }
076            throw cce;
077        }
078    }
079
080    /**
081     * Converts a string to a {@link Integer}.
082     *
083     * @param s  the string.
084     *
085     * @return a {@link Integer}.
086     */
087    public Object toPropertyValue(final String s) {
088        return new Integer(s);
089    }
090}