1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.webapp;
20
21 import org.eclipse.jetty.util.Loader;
22 import org.eclipse.jetty.util.log.Log;
23 import org.eclipse.jetty.util.log.Logger;
24 import org.eclipse.jetty.util.resource.Resource;
25
26 /**
27 * DiscoveredAnnotation
28 *
29 * Represents an annotation that has been discovered
30 * by scanning source code of WEB-INF/classes and WEB-INF/lib jars.
31 *
32 */
33 public abstract class DiscoveredAnnotation
34 {
35 private static final Logger LOG = Log.getLogger(DiscoveredAnnotation.class);
36
37 protected WebAppContext _context;
38 protected String _className;
39 protected Class<?> _clazz;
40 protected Resource _resource; //resource it was discovered on, can be null (eg from WEB-INF/classes)
41
42 public abstract void apply();
43
44 public DiscoveredAnnotation (WebAppContext context, String className)
45 {
46 this(context,className, null);
47 }
48
49
50 public DiscoveredAnnotation(WebAppContext context, String className, Resource resource)
51 {
52 _context = context;
53 _className = className;
54 _resource = resource;
55 }
56
57 public Resource getResource ()
58 {
59 return _resource;
60 }
61
62 public Class<?> getTargetClass()
63 {
64 if (_clazz != null)
65 return _clazz;
66
67 loadClass();
68
69 return _clazz;
70 }
71
72 private void loadClass ()
73 {
74 if (_clazz != null)
75 return;
76
77 if (_className == null)
78 return;
79
80 try
81 {
82 _clazz = Loader.loadClass(null, _className);
83 }
84 catch (Exception e)
85 {
86 LOG.warn(e);
87 }
88 }
89 }