1 // ========================================================================
2 // Copyright (c) 2010 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // All rights reserved. This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v1.0
6 // and Apache License v2.0 which accompanies this distribution.
7 // The Eclipse Public License is available at
8 // http://www.eclipse.org/legal/epl-v10.html
9 // The Apache License v2.0 is available at
10 // http://www.opensource.org/licenses/apache2.0.php
11 // You may elect to redistribute this code under either of these licenses.
12 // ========================================================================
13
14 package org.eclipse.jetty.webapp;
15
16 import org.eclipse.jetty.util.Loader;
17 import org.eclipse.jetty.util.log.Log;
18
19 /**
20 * DiscoveredAnnotation
21 *
22 * Represents an annotation that has been discovered
23 * by scanning source code of WEB-INF/classes and WEB-INF/lib jars.
24 *
25 */
26 public abstract class DiscoveredAnnotation
27 {
28 protected WebAppContext _context;
29 protected String _className;
30 protected Class _clazz;
31
32 public abstract void apply();
33
34 public DiscoveredAnnotation (WebAppContext context, String className)
35 {
36 _context = context;
37 _className = className;
38 }
39
40
41 public Class getTargetClass()
42 {
43 if (_clazz != null)
44 return _clazz;
45
46 loadClass();
47
48 return _clazz;
49 }
50
51 private void loadClass ()
52 {
53 if (_clazz != null)
54 return;
55
56 if (_className == null)
57 return;
58
59 try
60 {
61 _clazz = Loader.loadClass(null, _className);
62 }
63 catch (Exception e)
64 {
65 Log.warn(e);
66 }
67 }
68 }