IUrlClassLoader


1   /*
2    * @(#)IUrlClassLoader.java    1.0.0 11/17/2000 - 11:38:45
3    *
4    * Copyright (C) 2000,2002-2003 Matt Albrecht
5    * groboclown@users.sourceforge.net
6    * http://groboutils.sourceforge.net
7    *
8    *  Permission is hereby granted, free of charge, to any person obtaining a
9    *  copy of this software and associated documentation files (the "Software"),
10   *  to deal in the Software without restriction, including without limitation
11   *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
12   *  and/or sell copies of the Software, and to permit persons to whom the 
13   *  Software is furnished to do so, subject to the following conditions:
14   *
15   *  The above copyright notice and this permission notice shall be included in 
16   *  all copies or substantial portions of the Software. 
17   *
18   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
19   *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
20   *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
21   *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
22   *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
23   *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
24   *  DEALINGS IN THE SOFTWARE.
25   */
26  
27  package net.sourceforge.groboutils.util.classes.v1;
28  
29  import java.util.Hashtable  ;
30  import java.util.Enumeration  ;
31  import java.util.Vector  ;
32  
33  
34  
35  /**
36   * An interface for loading a specific class from a given URL (which is
37   * probably a Jar file).  Classes returned shouldn't be cached.
38   *
39   * @author  Matt Albrecht <a HREF="mailto:groboclown@users.sourceforge.net">groboclown@users.sourceforge.net</a>
40   * @version $Date: 2003/02/10 22:52:36 $
41   * @since   November 17, 2000 (GroboUtils Alpha 0.9.0)
42   */
43  public interface IUrlClassLoader
44  {
45      //----------------------------
46      // Public data
47      
48      //----------------------------
49      // Public abstract methods
50      
51      
52      /**
53       * Load the given class from the given URL.  If the URL is <tt>null</tt>,
54       * then it is up to the classloader to figure out where to load it from.
55       * This should, in general, load the class from the default class loader.
56       *
57       * @param className the exact class name to load.
58       * @param url the URL from which the class is loaded.  If this is
59       *    <tt>null</tt>, then the returned class is implementation specific.
60       * @return the loaded Class instance, or <tt>null</tt> if the class could
61       *    not be found.
62       */
63      public Class   loadClass( String   className, String   url );
64      
65      
66      /**
67       * Call to flush any cache stored in the interface.  This allows for
68       * a class loader to cache results, and free up memory when it is
69       * not needed.
70       */
71      public void flush();
72  }
73  
74
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