Source for gnu.java.net.loader.Load_gcjlib

   1: /* Copyright (C) 2007  Free Software Foundation
   2: 
   3:    This file is part of libgcj.
   4: 
   5: This software is copyrighted work licensed under the terms of the
   6: Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7: details.  */
   8: 
   9: package gnu.java.net.loader;
  10: 
  11: import gnu.gcj.runtime.SharedLibHelper;
  12: import java.io.InputStream;
  13: import java.io.IOException;
  14: import java.net.URL;
  15: import java.net.URLClassLoader;
  16: import java.net.URLConnection;
  17: import java.net.URLStreamHandlerFactory;
  18: 
  19: /**
  20:  * A <code>Load_gcjlib</code> is a type of <code>URLLoader</code>
  21:  * that loads classes and resources from a shared library.
  22:  */
  23: public final class Load_gcjlib extends URLLoader
  24: {
  25:   private SharedLibHelper helper;
  26: 
  27:   public Load_gcjlib(URLClassLoader classloader,
  28:              URLStreamHandlerCache cache,
  29:              URLStreamHandlerFactory factory,
  30:              URL url, URL absoluteUrl)
  31:   {
  32:     super(classloader, cache, factory, url, absoluteUrl);
  33:     helper = SharedLibHelper.findHelper(classloader, url.getFile(),
  34:                     noCertCodeSource, true);
  35:   }
  36: 
  37:   public Class getClass(String className)
  38:   {
  39:     return helper.findClass(className);
  40:   }
  41: 
  42:   public Resource getResource(String name)
  43:   {
  44:     URL url = helper.findResource(name);
  45:     if (url == null)
  46:       return null;
  47:     return new SoResource(this, url);
  48:   }
  49: 
  50:   final static class SoResource extends Resource
  51:   {
  52:     private final URL url;
  53: 
  54:     SoResource(Load_gcjlib loader, URL url)
  55:     {
  56:       super(loader);
  57:       this.url = url;
  58:     }
  59: 
  60:     public InputStream getInputStream() throws IOException
  61:     {
  62:       URLConnection conn = url.openConnection();
  63:       return conn.getInputStream();
  64:     }
  65: 
  66:     public int getLength()
  67:     {
  68:       // FIXME we could find this by asking the core object.
  69:       return -1;
  70:     }
  71: 
  72:     public URL getURL ()
  73:     {
  74:       return url;
  75:     }
  76:   }
  77: }