| /* |
| * Copyright (C) 2016 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 com.android.cellbroadcastreceiver.unit; |
| |
| import android.os.IBinder; |
| import android.os.ServiceManager; |
| |
| import java.lang.reflect.Field; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| |
| // This class is for replacing existing system service with the mocked service. |
| public final class MockedServiceManager { |
| |
| private final String TAG = MockedServiceManager.class.getSimpleName(); |
| |
| private final HashMap<String, IBinder> mServiceManagerMockedServices = new HashMap<>(); |
| |
| private final HashMap<InstanceKey, Object> mOldInstances = new HashMap<>(); |
| |
| private final LinkedList<InstanceKey> mInstanceKeys = new LinkedList<>(); |
| |
| private static class InstanceKey { |
| final Class mClass; |
| final String mInstName; |
| final Object mObj; |
| |
| InstanceKey(final Class c, final String instName, final Object obj) { |
| mClass = c; |
| mInstName = instName; |
| mObj = obj; |
| } |
| |
| @Override |
| public int hashCode() { |
| return (mClass.getName().hashCode() * 31 + mInstName.hashCode()) * 31; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null || obj.getClass() != getClass()) { |
| return false; |
| } |
| |
| InstanceKey other = (InstanceKey) obj; |
| return (other.mClass == mClass && other.mInstName.equals(mInstName) |
| && other.mObj == mObj); |
| } |
| } |
| |
| MockedServiceManager() throws Exception { |
| replaceInstance(ServiceManager.class, "sCache", null, mServiceManagerMockedServices); |
| } |
| |
| void replaceService(String key, IBinder binder) { |
| mServiceManagerMockedServices.put(key, binder); |
| } |
| |
| void restoreAllServices() throws Exception { |
| restoreInstances(); |
| } |
| |
| private synchronized void replaceInstance(final Class c, final String instanceName, |
| final Object obj, final Object newValue) |
| throws Exception { |
| Field field = c.getDeclaredField(instanceName); |
| field.setAccessible(true); |
| |
| InstanceKey key = new InstanceKey(c, instanceName, obj); |
| if (!mOldInstances.containsKey(key)) { |
| mOldInstances.put(key, field.get(obj)); |
| mInstanceKeys.add(key); |
| } |
| field.set(obj, newValue); |
| } |
| |
| private synchronized void restoreInstances() throws Exception { |
| Iterator<InstanceKey> it = mInstanceKeys.descendingIterator(); |
| |
| while (it.hasNext()) { |
| InstanceKey key = it.next(); |
| Field field = key.mClass.getDeclaredField(key.mInstName); |
| field.setAccessible(true); |
| field.set(key.mObj, mOldInstances.get(key)); |
| } |
| |
| mInstanceKeys.clear(); |
| mOldInstances.clear(); |
| } |
| } |