content: /*
   * Copyright (C) 2019 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.permission;
  
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.UserIdInt;
  import android.os.UserHandle;
  
  /**
   * Internal interfaces to be used by other components within the system server.
   *
   * <p>Only for use within the system server.
   *
   * @hide
   */
  public abstract class PermissionManagerInternal {
  
      /**
       * Listener for package permission state (permissions or flags) changes.
       */
      public interface OnRuntimePermissionStateChangedListener {
  
          /**
           * Called when the runtime permission state (permissions or flags) changed.
           *
           * @param packageName The package for which the change happened.
           * @param userId the user id for which the change happened.
           */
          @Nullable
          void onRuntimePermissionStateChanged(@NonNull String packageName,
                  @UserIdInt int userId);
      }
  
      /**
       * Get the state of the runtime permissions as xml file.
       *
       * @param user The user the data should be extracted for
       *
       * @return The state as a xml file
       */
      public abstract @Nullable byte[] backupRuntimePermissions(@NonNull UserHandle user);
  
      /**
       * Restore a permission state previously backed up via {@link #backupRuntimePermissions}.
       *
       * <p>If not all state can be restored, the un-restoreable state will be delayed and can be
       * re-tried via {@link #restoreDelayedRuntimePermissions}.
       *
       * @param backup The state as an xml file
       * @param user The user the data should be restored for
       */
      public abstract void restoreRuntimePermissions(@NonNull byte[] backup,
              @NonNull UserHandle user);
  
      /**
       * Try to apply permission backup of a package that was previously not applied.
       *
       * @param packageName The package that is newly installed
       * @param user The user the package is installed for
       *
       * @see #restoreRuntimePermissions
       */
      public abstract void restoreDelayedRuntimePermissions(@NonNull String packageName,
              @NonNull UserHandle user);
  
      /**
       * Adds a listener for runtime permission state (permissions or flags) changes.
       *
       * @param listener The listener.
       */
      public abstract void addOnRuntimePermissionStateChangedListener(
              @NonNull OnRuntimePermissionStateChangedListener listener);
  
      /**
       * Removes a listener for runtime permission state (permissions or flags) changes.
       *
       * @param listener The listener.
       */
      public abstract void removeOnRuntimePermissionStateChangedListener(
              @NonNull OnRuntimePermissionStateChangedListener listener);
  }
  