Source for org.jfree.xml.factory.objects.URLObjectDescription

   1: /* ========================================================================
   2:  * JCommon : a free general purpose class library for the Java(tm) platform
   3:  * ========================================================================
   4:  *
   5:  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   6:  * 
   7:  * Project Info:  http://www.jfree.org/jcommon/index.html
   8:  *
   9:  * This library is free software; you can redistribute it and/or modify it 
  10:  * under the terms of the GNU Lesser General Public License as published by 
  11:  * the Free Software Foundation; either version 2.1 of the License, or 
  12:  * (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but 
  15:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
  16:  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
  17:  * License for more details.
  18:  *
  19:  * You should have received a copy of the GNU Lesser General Public
  20:  * License along with this library; if not, write to the Free Software
  21:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
  22:  * USA.  
  23:  *
  24:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
  25:  * in the United States and other countries.]
  26:  * 
  27:  * --------------------
  28:  * URLClassFactory.java
  29:  * --------------------
  30:  * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
  31:  *
  32:  * Original Author:  Thomas Morgner;
  33:  * Contributor(s):   David Gilbert (for Object Refinery Limited);
  34:  *
  35:  * $Id: URLObjectDescription.java,v 1.3 2005/11/14 11:04:43 mungady Exp $
  36:  *
  37:  * Changes (from 19-Feb-2003)
  38:  * -------------------------
  39:  * 19-Feb-2003 : Added standard header and Javadocs (DG);
  40:  * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon
  41:  *
  42:  */
  43: 
  44: package org.jfree.xml.factory.objects;
  45: 
  46: import java.net.URL;
  47: 
  48: import org.jfree.io.IOUtils;
  49: import org.jfree.util.Log;
  50: import org.jfree.xml.Parser;
  51: 
  52: /**
  53:  * An object-description for a <code>URL</code> object.
  54:  *
  55:  * @author Thomas Morgner
  56:  */
  57: public class URLObjectDescription extends AbstractObjectDescription {
  58: 
  59:     /**
  60:      * Creates a new object description.
  61:      */
  62:     public URLObjectDescription() {
  63:         super(URL.class);
  64:         setParameterDefinition("value", String.class);
  65:     }
  66: 
  67:     /**
  68:      * Creates an object based on this description.
  69:      *
  70:      * @return The object.
  71:      */
  72:     public Object createObject() {
  73:         final String o = (String) getParameter("value");
  74:         final String baseURL = getConfig().getConfigProperty(Parser.CONTENTBASE_KEY);
  75:         try {
  76:             try {
  77:                 final URL bURL = new URL(baseURL);
  78:                 return new URL(bURL, o);
  79:             }
  80:             catch (Exception e) {
  81:                 Log.warn("BaseURL is invalid: ", e);
  82:             }
  83:             return new URL(o);
  84:         }
  85:         catch (Exception e) {
  86:             return null;
  87:         }
  88:     }
  89: 
  90:     /**
  91:      * Sets the parameters of this description object to match the supplied object.
  92:      *
  93:      * @param o  the object (should be an instance of <code>URL</code>).
  94:      *
  95:      * @throws ObjectFactoryException if the object is not an instance of <code>URL</code>.
  96:      */
  97:     public void setParameterFromObject(final Object o) throws ObjectFactoryException {
  98:         if (!(o instanceof URL)) {
  99:             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: }