1 /* 2 * Copyright (C) 2018 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 android.annotation.UserIdInt; 19 20 import com.android.server.LocalServices; 21 22 /** 23 * Stores a copy of the set of device policies maintained by {@link DevicePolicyManager} that 24 * can be accessed from any place without risking dead locks. 25 * 26 * @hide 27 */ 28 public abstract class DevicePolicyCache { DevicePolicyCache()29 protected DevicePolicyCache() { 30 } 31 32 /** 33 * @return the instance. 34 */ getInstance()35 public static DevicePolicyCache getInstance() { 36 final DevicePolicyManagerInternal dpmi = 37 LocalServices.getService(DevicePolicyManagerInternal.class); 38 return (dpmi != null) ? dpmi.getDevicePolicyCache() : EmptyDevicePolicyCache.INSTANCE; 39 } 40 41 /** 42 * See {@link DevicePolicyManager#getScreenCaptureDisabled} 43 */ isScreenCaptureAllowed(@serIdInt int userHandle)44 public abstract boolean isScreenCaptureAllowed(@UserIdInt int userHandle); 45 46 /** 47 * Caches {@link DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} of the 48 * given user with {@code null} passed in as argument. 49 */ getPasswordQuality(@serIdInt int userHandle)50 public abstract int getPasswordQuality(@UserIdInt int userHandle); 51 52 /** 53 * Caches {@link DevicePolicyManager#getPermissionPolicy(android.content.ComponentName)} of 54 * the given user. 55 */ getPermissionPolicy(@serIdInt int userHandle)56 public abstract int getPermissionPolicy(@UserIdInt int userHandle); 57 58 /** 59 * Caches {@link DevicePolicyManager#canAdminGrantSensorsPermissionsForUser(int)} for the 60 * given user. 61 */ canAdminGrantSensorsPermissionsForUser(@serIdInt int userHandle)62 public abstract boolean canAdminGrantSensorsPermissionsForUser(@UserIdInt int userHandle); 63 64 65 /** 66 * Empty implementation. 67 */ 68 private static class EmptyDevicePolicyCache extends DevicePolicyCache { 69 private static final EmptyDevicePolicyCache INSTANCE = new EmptyDevicePolicyCache(); 70 71 @Override isScreenCaptureAllowed(int userHandle)72 public boolean isScreenCaptureAllowed(int userHandle) { 73 return true; 74 } 75 76 @Override getPasswordQuality(int userHandle)77 public int getPasswordQuality(int userHandle) { 78 return DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED; 79 } 80 81 @Override getPermissionPolicy(int userHandle)82 public int getPermissionPolicy(int userHandle) { 83 return DevicePolicyManager.PERMISSION_POLICY_PROMPT; 84 } 85 86 @Override canAdminGrantSensorsPermissionsForUser(int userHandle)87 public boolean canAdminGrantSensorsPermissionsForUser(int userHandle) { 88 return false; 89 } 90 } 91 } 92