content: /*
   * Copyright (C) 2015 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.os.storage;
  
  import android.annotation.Nullable;
  import android.os.IVold;
  
  /**
   * Mount service local interface.
   *
   * @hide Only for use within the system server.
   */
  public abstract class StorageManagerInternal {
  
      /**
       * Policy that influences how external storage is mounted and reported.
       */
      public interface ExternalStorageMountPolicy {
          /**
           * Gets the external storage mount mode for the given uid.
           *
           * @param uid The UID for which to determine mount mode.
           * @param packageName The package in the UID for making the call.
           * @return The mount mode.
           *
           * @see com.android.internal.os.Zygote#MOUNT_EXTERNAL_NONE
           * @see com.android.internal.os.Zygote#MOUNT_EXTERNAL_DEFAULT
           * @see com.android.internal.os.Zygote#MOUNT_EXTERNAL_READ
           * @see com.android.internal.os.Zygote#MOUNT_EXTERNAL_WRITE
           */
          public int getMountMode(int uid, String packageName);
  
          /**
           * Gets whether external storage should be reported to the given UID.
           *
           * @param uid The UID for which to determine whether it has external storage.
           * @param packageName The package in the UID for making the call.
           * @return Weather to report external storage.
           * @return True to report the state of external storage, false to
           *     report it as unmounted.
           */
          public boolean hasExternalStorage(int uid, String packageName);
      }
  
      /**
       * Adds a policy for determining how external storage is mounted and reported.
       * The mount mode is the most conservative result from querying all registered
       * policies. Similarly, the reported state is the most conservative result from
       * querying all registered policies.
       *
       * @param policy The policy to add.
       */
      public abstract void addExternalStoragePolicy(ExternalStorageMountPolicy policy);
  
      /**
       * Notify the mount service that the mount policy for a UID changed.
       * @param uid The UID for which policy changed.
       * @param packageName The package in the UID for making the call.
       */
      public abstract void onExternalStoragePolicyChanged(int uid, String packageName);
  
      /**
       * Gets the mount mode to use for a given UID as determined by consultin all
       * policies.
       *
       * @param uid The UID for which to get mount mode.
       * @param packageName The package in the UID for making the call.
       * @return The mount mode.
       */
      public abstract int getExternalStorageMountMode(int uid, String packageName);
  
      /**
       * A listener for reset events in the StorageManagerService.
       */
      public interface ResetListener {
          /**
           * A method that should be triggered internally by StorageManagerInternal
           * when StorageManagerService reset happens.
           *
           * @param vold The binder object to vold.
           */
          void onReset(IVold vold);
      }
  
      /**
       * Add a listener to listen to reset event in StorageManagerService.
       *
       * @param listener The listener that will be notified on reset events.
       */
      public abstract void addResetListener(ResetListener listener);
  
      /**
       * Notified when any app op changes so that storage mount points can be updated if the app op
       * affects them.
       */
      public abstract void onAppOpsChanged(int code, int uid,
              @Nullable String packageName, int mode);
  }
  