| /* |
| * 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); |
| } |
| } |