1 package org.codehaus.plexus.classworlds.strategy;
2
3 /*
4 * Copyright 2001-2010 Codehaus Foundation.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 import java.io.IOException;
20 import java.net.URL;
21 import java.util.Enumeration;
22
23 import org.codehaus.plexus.classworlds.realm.ClassRealm;
24
25 public class OsgiBundleStrategy extends AbstractStrategy {
26
27 // java.* from parent
28 // imported packages [Import-Package header with explicit constraints on the exporter]
29 // requires bundle [Required-Bundle]
30 // self [Bundle-Classpath header]
31 // attached fragments
32 //
33 // We need to trya and be OSGi r4 compliant in the loading of all the bundles so that we can try to
34 // load eclipse without requiring equinox. Or any other OSGi container for that matter.
35 public OsgiBundleStrategy(ClassRealm realm) {
36 super(realm);
37 }
38
39 public Class<?> loadClass(String name) throws ClassNotFoundException {
40 Class<?> clazz = realm.loadClassFromImport(name);
41
42 if (clazz == null) {
43 clazz = realm.loadClassFromSelf(name);
44
45 if (clazz == null) {
46 clazz = realm.loadClassFromParent(name);
47
48 if (clazz == null) {
49 throw new ClassNotFoundException(name);
50 }
51 }
52 }
53
54 return clazz;
55 }
56
57 public URL getResource(String name) {
58 URL resource = realm.loadResourceFromImport(name);
59
60 if (resource == null) {
61 resource = realm.loadResourceFromSelf(name);
62
63 if (resource == null) {
64 resource = realm.loadResourceFromParent(name);
65 }
66 }
67
68 return resource;
69 }
70
71 public Enumeration<URL> getResources(String name) throws IOException {
72 Enumeration<URL> imports = realm.loadResourcesFromImport(name);
73 Enumeration<URL> self = realm.loadResourcesFromSelf(name);
74 Enumeration<URL> parent = realm.loadResourcesFromParent(name);
75
76 return combineResources(imports, self, parent);
77 }
78 }