Rubin Xu | 0f1e56d | 2019-08-23 13:34:25 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package android.app.admin; |
| 17 | |
| 18 | import com.android.server.LocalServices; |
| 19 | |
| 20 | /** |
| 21 | * Stores a copy of the set of device state maintained by {@link DevicePolicyManager} which |
| 22 | * is not directly related to admin policies. This lives in its own class so that the state |
| 23 | * can be accessed from any place without risking dead locks. |
| 24 | * |
| 25 | * @hide |
| 26 | */ |
| 27 | public abstract class DeviceStateCache { |
| 28 | protected DeviceStateCache() { |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * @return the instance. |
| 33 | */ |
| 34 | public static DeviceStateCache getInstance() { |
| 35 | final DevicePolicyManagerInternal dpmi = |
| 36 | LocalServices.getService(DevicePolicyManagerInternal.class); |
| 37 | return (dpmi != null) ? dpmi.getDeviceStateCache() : EmptyDeviceStateCache.INSTANCE; |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * See {@link DevicePolicyManager#isDeviceProvisioned} |
| 42 | */ |
| 43 | public abstract boolean isDeviceProvisioned(); |
| 44 | |
| 45 | /** |
| 46 | * Empty implementation. |
| 47 | */ |
| 48 | private static class EmptyDeviceStateCache extends DeviceStateCache { |
| 49 | private static final EmptyDeviceStateCache INSTANCE = new EmptyDeviceStateCache(); |
| 50 | |
| 51 | @Override |
| 52 | public boolean isDeviceProvisioned() { |
| 53 | return false; |
| 54 | } |
| 55 | } |
| 56 | } |