FakeURLStreamHandler


1   /*
2    * Oscar - An implementation of the OSGi framework.
3    * Copyright (c) 2004, Richard S. Hall
4    * All rights reserved.
5    *  
6    * Redistribution and use in source and binary forms, with or without
7    * modification, are permitted provided that the following conditions
8    * are met:
9    *  
10   *   * Redistributions of source code must retain the above copyright
11   *     notice, this list of conditions and the following disclaimer.
12   *   * Redistributions in binary form must reproduce the above copyright
13   *     notice, this list of conditions and the following disclaimer in
14   *     the documentation and/or other materials provided with the
15   *     distribution.
16   *   * Neither the name of the ungoverned.org nor the names of its
17   *     contributors may be used to endorse or promote products derived
18   *     from this software without specific prior written permission.
19   *  
20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31   * 
32   * Contact: Richard S. Hall (heavy@ungoverned.org)
33   * Contributor(s):
34   *
35  **/
36  package org.ungoverned.oscar;
37  
38  import java.io.IOException  ;
39  import java.net.URL  ;
40  import java.net.URLConnection  ;
41  import java.net.URLStreamHandler  ;
42  
43  /**
44   * This class implements a fake stream handler. This class is necessary in
45   * some cases when assigning <tt>CodeSource</tt>s to classes in
46   * <tt>BundleClassLoader</tt>. In general, the bundle location is an URL
47   * and this URL is used as the code source for the bundle's associated
48   * classes. The OSGi specification does not require that the bundle
49   * location be an URL, though, so in that case we try to generate a
50   * fake URL for the code source of the bundle, which is just the location
51   * string prepended with the "location:" protocol, by default. We need
52   * this fake handler to avoid an unknown protocol exception.
53  **/
54  class FakeURLStreamHandler extends URLStreamHandler  
55  {
56      protected URLConnection   openConnection(URL   url) throws IOException  
57      {
58          return null;
59      }
60  }
61
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