content: /*
   * Copyright (C) 2018 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.app.admin;
  
  import android.annotation.UserIdInt;
  
  import com.android.server.LocalServices;
  
  /**
   * Stores a copy of the set of device policies maintained by {@link DevicePolicyManager} that
   * can be accessed from any place without risking dead locks.
   *
   * @hide
   */
  public abstract class DevicePolicyCache {
      protected DevicePolicyCache() {
      }
  
      /**
       * @return the instance.
       */
      public static DevicePolicyCache getInstance() {
          final DevicePolicyManagerInternal dpmi =
                  LocalServices.getService(DevicePolicyManagerInternal.class);
          return (dpmi != null) ? dpmi.getDevicePolicyCache() : EmptyDevicePolicyCache.INSTANCE;
      }
  
      /**
       * See {@link DevicePolicyManager#getScreenCaptureDisabled}
       */
      public abstract boolean getScreenCaptureDisabled(@UserIdInt int userHandle);
  
      /**
       * Caches {@link DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} of the
       * given user with {@code null} passed in as argument.
       */
      public abstract int getPasswordQuality(@UserIdInt int userHandle);
  
      /**
       * Empty implementation.
       */
      private static class EmptyDevicePolicyCache extends DevicePolicyCache {
          private static final EmptyDevicePolicyCache INSTANCE = new EmptyDevicePolicyCache();
  
          @Override
          public boolean getScreenCaptureDisabled(int userHandle) {
              return false;
          }
  
          @Override
          public int getPasswordQuality(int userHandle) {
              return DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED;
          }
      }
  }
  