1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.contribution.osgi.impl;
import java.util.Collection;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import org.apache.tuscany.sca.contribution.osgi.BundleReference;
import org.apache.tuscany.sca.contribution.resolver.ClassReference;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.osgi.framework.Bundle;
/**
* An implementation of an artifact resolver for OSGi bundles.
*
* @version $Rev$ $Date$
*/
public class OSGiModelResolverImpl implements ModelResolver {
private static final long serialVersionUID = -7826976465762296634L;
private Map<Object, Object> map = new HashMap<Object, Object>();
private Hashtable<String, Bundle> bundles;
public OSGiModelResolverImpl(Hashtable<String, Bundle> bundles) {
this.bundles = bundles;
}
public <T> T resolveModel(Class<T> modelClass, T unresolved) {
Object resolved = map.get(unresolved);
if (resolved != null) {
// Return the resolved object
return modelClass.cast(resolved);
} else if (unresolved instanceof ClassReference) {
// Load a class on demand
ClassReference classReference = (ClassReference)unresolved;
Class clazz = null;
for (Bundle bundle : bundles.values()) {
try {
clazz = bundle.loadClass(classReference.getClassName());
} catch (ClassNotFoundException e) {
continue;
}
break;
}
if (clazz == null) {
// Return the unresolved object
return unresolved;
}
// Store a new ClassReference wrapping the loaded class
resolved = new ClassReference(clazz);
map.put(resolved, resolved);
// Return the resolved ClassReference
return modelClass.cast(resolved);
} else if (unresolved instanceof BundleReference) {
for (String bundlePath: bundles.keySet()) {
Bundle bundle = bundles.get(bundlePath);
BundleReference bundleRef = (BundleReference)unresolved;
String bundleVersion = (String)bundle.getHeaders().get("Bundle-Version");
if (bundle.getSymbolicName().equals(bundleRef.getBundleName())&&
(bundleVersion == null || bundleRef.getBundleVersion() == null ||
bundleVersion.equals(bundleRef.getBundleVersion()))) {
resolved = new BundleReference(bundle,
bundle.getSymbolicName(),
bundleVersion,
bundlePath);
map.put(resolved, resolved);
// Return the resolved BundleReference
return modelClass.cast(resolved);
}
}
}
// Return the unresolved object
return unresolved;
}
public void addModel(Object resolved) {
map.put(resolved, resolved);
}
public Object removeModel(Object resolved) {
return map.remove(resolved);
}
public Collection<Object> getModels() {
return map.values();
}
}
|
