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1 | /* | |
2 | * See the NOTICE file distributed with this work for additional | |
3 | * information regarding copyright ownership. | |
4 | * | |
5 | * This is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU Lesser General Public License as | |
7 | * published by the Free Software Foundation; either version 2.1 of | |
8 | * the License, or (at your option) any later version. | |
9 | * | |
10 | * This software is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this software; if not, write to the Free | |
17 | * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA, or see the FSF site: http://www.fsf.org. | |
19 | */ | |
20 | package org.xwiki.classloader.internal; | |
21 | ||
22 | import java.net.URLStreamHandler; | |
23 | import java.net.URLStreamHandlerFactory; | |
24 | ||
25 | import javax.inject.Inject; | |
26 | import javax.inject.Singleton; | |
27 | ||
28 | import org.xwiki.classloader.ExtendedURLStreamHandler; | |
29 | import org.xwiki.component.annotation.Component; | |
30 | import org.xwiki.component.manager.ComponentLookupException; | |
31 | import org.xwiki.component.manager.ComponentManager; | |
32 | ||
33 | /** | |
34 | * Stream handler factory that uses components to lookup stream handler for protocols. | |
35 | * | |
36 | * @version $Id: ba322c56e651eb14f64757953a9e5fc2530149d6 $ | |
37 | * @since 2.0.1 | |
38 | */ | |
39 | @Component(roles={URLStreamHandlerFactory.class}) | |
40 | @Singleton | |
41 | public class ExtendedURLStreamHandlerFactory implements URLStreamHandlerFactory | |
42 | { | |
43 | /** | |
44 | * To dynamically lookup stream handler components. | |
45 | */ | |
46 | @Inject | |
47 | private ComponentManager componentManager; | |
48 | ||
49 | 0 | @Override |
50 | public URLStreamHandler createURLStreamHandler(String protocol) | |
51 | { | |
52 | 0 | ExtendedURLStreamHandler result; |
53 | 0 | try { |
54 | 0 | result = this.componentManager.lookup(ExtendedURLStreamHandler.class, protocol); |
55 | } catch (ComponentLookupException cle) { | |
56 | // No special protocol handler found, return null since code using this factory | |
57 | // should know how to deal when no protocol handler is found. | |
58 | 0 | result = null; |
59 | } | |
60 | ||
61 | // All implementations of ExtendedURLStreamHandler must also extend URLStreamHandler | |
62 | // Note: we could make ExtendedURLStreamHandler extend URLStreamHandler since URLStreamHandler | |
63 | // is an abstract class and not an interface... | |
64 | 0 | return (URLStreamHandler) result; |
65 | } | |
66 | } |
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