Source for gnu.java.net.DefaultContentHandlerFactory

   1: /* DefaultContentHandlerFactory.java
   2:    Copyright (C) 2004 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10:  
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.net;
  40: 
  41: import java.awt.Toolkit;
  42: import java.io.IOException;
  43: import java.net.ContentHandler;
  44: import java.net.ContentHandlerFactory;
  45: import java.net.URLConnection;
  46: import java.util.Arrays;
  47: import java.util.HashSet;
  48: 
  49: import gnu.java.awt.ClasspathToolkit;
  50: 
  51: /** Content Handler for Image types, using the AWT Toolkit's image decoder. */
  52: class ImageHandler extends ContentHandler
  53: {
  54:   static ImageHandler instance = new ImageHandler();
  55:   
  56:   public Object getContent(URLConnection urlc) throws IOException
  57:   {
  58:     // FIXME: implement using ImageIO
  59:     // ClasspathToolkit tk = (ClasspathToolkit) Toolkit.getDefaultToolkit();
  60:     // java.awt.image.ImageProducer ip = tk.createImageProducer(urlc.getURL());
  61:     // return ip;
  62:     return null;
  63:   }
  64: }
  65: 
  66: /**
  67:  */
  68: public class DefaultContentHandlerFactory implements ContentHandlerFactory
  69: {
  70:   /** For now, hard code the list of types that we assume should
  71:    *  be supported by the Toolkit. ClasspathToolkit should perhaps provide
  72:    *  an API to express what Image MIME types the Toolkit understands.
  73:    */
  74:   private static String[] known_image_types =
  75:     {
  76:       "image/bmp",
  77:       "image/gif",
  78:       "image/jpeg",
  79:       "image/png",
  80:       "image/tiff",
  81:       "image/x-portable-anymap",
  82:       "image/x-cmu-raster",
  83:       "image/x-xbitmap",
  84:       "image/x-xpixmap"
  85:     };
  86:    
  87:   private static HashSet imageTypes
  88:     = new HashSet(Arrays.asList(known_image_types));
  89: 
  90:   public ContentHandler createContentHandler(String mimeType)
  91:   {
  92:     if (imageTypes.contains(mimeType))
  93:       return ImageHandler.instance;
  94:     // Currently, only image types are handled.
  95:     return null;
  96:   }
  97: }