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 * URLClassFactory.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: URLObjectDescription.java,v 1.3 2005/11/14 11:04:43 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
044package org.jfree.xml.factory.objects;
045
046import java.net.URL;
047
048import org.jfree.io.IOUtils;
049import org.jfree.util.Log;
050import org.jfree.xml.Parser;
051
052/**
053 * An object-description for a <code>URL</code> object.
054 *
055 * @author Thomas Morgner
056 */
057public class URLObjectDescription extends AbstractObjectDescription {
058
059    /**
060     * Creates a new object description.
061     */
062    public URLObjectDescription() {
063        super(URL.class);
064        setParameterDefinition("value", String.class);
065    }
066
067    /**
068     * Creates an object based on this description.
069     *
070     * @return The object.
071     */
072    public Object createObject() {
073        final String o = (String) getParameter("value");
074        final String baseURL = getConfig().getConfigProperty(Parser.CONTENTBASE_KEY);
075        try {
076            try {
077                final URL bURL = new URL(baseURL);
078                return new URL(bURL, o);
079            }
080            catch (Exception e) {
081                Log.warn("BaseURL is invalid: ", e);
082            }
083            return new URL(o);
084        }
085        catch (Exception e) {
086            return null;
087        }
088    }
089
090    /**
091     * Sets the parameters of this description object to match the supplied object.
092     *
093     * @param o  the object (should be an instance of <code>URL</code>).
094     *
095     * @throws ObjectFactoryException if the object is not an instance of <code>URL</code>.
096     */
097    public void setParameterFromObject(final Object o) throws ObjectFactoryException {
098        if (!(o instanceof URL)) {
099            throw new ObjectFactoryException("Is no instance of java.net.URL");
100        }
101
102        final URL comp = (URL) o;
103        final String baseURL = getConfig().getConfigProperty(Parser.CONTENTBASE_KEY);
104        try {
105            final URL bURL = new URL(baseURL);
106            setParameter("value", IOUtils.getInstance().createRelativeURL(comp, bURL));
107        }
108        catch (Exception e) {
109            Log.warn("BaseURL is invalid: ", e);
110        }
111        setParameter("value", comp.toExternalForm());
112    }
113
114}