01: /*
02: * @(#)IUrlClassLoader.java 1.0.0 11/17/2000 - 11:38:45
03: *
04: * Copyright (C) 2000,2002-2003 Matt Albrecht
05: * groboclown@users.sourceforge.net
06: * http://groboutils.sourceforge.net
07: *
08: * Permission is hereby granted, free of charge, to any person obtaining a
09: * 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: * An interface for loading a specific class from a given URL (which is
35: * probably a Jar file). Classes returned shouldn't be cached.
36: *
37: * @author Matt Albrecht <a href="mailto:groboclown@users.sourceforge.net">groboclown@users.sourceforge.net</a>
38: * @version $Date: 2003/02/10 22:52:36 $
39: * @since November 17, 2000 (GroboUtils Alpha 0.9.0)
40: */
41: public interface IUrlClassLoader {
42: //----------------------------
43: // Public data
44:
45: //----------------------------
46: // Public abstract methods
47:
48: /**
49: * Load the given class from the given URL. If the URL is <tt>null</tt>,
50: * then it is up to the classloader to figure out where to load it from.
51: * This should, in general, load the class from the default class loader.
52: *
53: * @param className the exact class name to load.
54: * @param url the URL from which the class is loaded. If this is
55: * <tt>null</tt>, then the returned class is implementation specific.
56: * @return the loaded Class instance, or <tt>null</tt> if the class could
57: * not be found.
58: */
59: public Class loadClass(String className, String url);
60:
61: /**
62: * Call to flush any cache stored in the interface. This allows for
63: * a class loader to cache results, and free up memory when it is
64: * not needed.
65: */
66: public void flush();
67: }
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