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 { 29 protected DevicePolicyCache() { 30 } 31 32 /** 33 * @return the instance. 34 */ 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 */ 44 public abstract boolean getScreenCaptureDisabled(@UserIdInt int userHandle); 45 46 /** 47 * Empty implementation. 48 */ 49 private static class EmptyDevicePolicyCache extends DevicePolicyCache { 50 private static final EmptyDevicePolicyCache INSTANCE = new EmptyDevicePolicyCache(); 51 52 @Override 53 public boolean getScreenCaptureDisabled(int userHandle) { 54 return false; 55 } 56 } 57 } 58
