1 package org.codehaus.mojo.apt;
2
3 /*
4 * The MIT License
5 *
6 * Copyright 2006-2008 The Codehaus.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy of
9 * this software and associated documentation files (the "Software"), to deal in
10 * the Software without restriction, including without limitation the rights to
11 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
12 * of the Software, and to permit persons to whom the Software is furnished to do
13 * so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in all
16 * 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 THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 */
26
27 import java.net.URL;
28 import java.net.URLClassLoader;
29 import java.net.URLStreamHandlerFactory;
30
31 /**
32 * Provides a more embedder friendly {@link URLClassLoader} for APT. The constructor that takes no parent will delegate
33 * to the APT class loader instead of the system class loader.
34 *
35 * @author Benjamin Bentmann
36 */
37 public class EmbeddedURLClassLoader
38 extends URLClassLoader
39 {
40
41 /**
42 * Fixes the class loading in APT to be embeddable. To load a factory, APT is doing something like
43 *
44 * <pre>
45 * ClassLoader classLoader = new URLClassLoader( classPath );
46 * AnnotationProcessorFactory factory = (AnnotationProcessorFactory) classLoader.loadClass( name );
47 * </pre>
48 *
49 * i.e. it's assumed that {@code AnnotationProcessorFactory} is present in the system class loader. This is
50 * generally wrong so we derive the factory class loader from the APT class loader.
51 */
52 public EmbeddedURLClassLoader( URL[] urls )
53 {
54 this( urls, AptClassLoader.INSTANCE );
55 }
56
57 public EmbeddedURLClassLoader( URL[] urls, ClassLoader parent )
58 {
59 super( urls, parent );
60 }
61
62 public EmbeddedURLClassLoader( URL[] urls, ClassLoader parent, URLStreamHandlerFactory factory )
63 {
64 super( urls, parent, factory );
65 }
66
67 }