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
|
/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed 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 android.webkit;
import android.content.Context;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.Log;
class PluginUtil {
private static final String LOGTAG = "PluginUtil";
/**
*
* @param packageName the name of the apk where the class can be found
* @param className the fully qualified name of a subclass of PluginStub
*/
/* package */
static PluginStub getPluginStub(Context context, String packageName,
String className) {
try {
Class<?> stubClass = getPluginClass(context, packageName, className);
Object stubObject = stubClass.newInstance();
if (stubObject instanceof PluginStub) {
return (PluginStub) stubObject;
} else {
Log.e(LOGTAG, "The plugin class is not of type PluginStub");
}
} catch (Exception e) {
// Any number of things could have happened. Log the exception and
// return null. Careful not to use Log.e(LOGTAG, "String", e)
// because that reports the exception to the checkin service.
Log.e(LOGTAG, Log.getStackTraceString(e));
}
return null;
}
/* package */
static Class<?> getPluginClass(Context context, String packageName,
String className) throws NameNotFoundException, ClassNotFoundException {
Context pluginContext = context.createPackageContext(packageName,
Context.CONTEXT_INCLUDE_CODE |
Context.CONTEXT_IGNORE_SECURITY);
ClassLoader pluginCL = pluginContext.getClassLoader();
return pluginCL.loadClass(className);
}
}
|
