| /* |
| * Copyright (C) 2009 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.backup; |
| |
| import android.content.Context; |
| import android.os.ParcelFileDescriptor; |
| import android.util.Log; |
| |
| import java.io.File; |
| |
| /** |
| * Like FileBackupHelper, but takes absolute paths for the files instead of |
| * subpaths of getFilesDir() |
| * |
| * STOPSHIP: document! |
| */ |
| public class AbsoluteFileBackupHelper extends FileBackupHelperBase implements BackupHelper { |
| private static final String TAG = "AbsoluteFileBackupHelper"; |
| private static final boolean DEBUG = false; |
| |
| Context mContext; |
| String[] mFiles; |
| |
| /** |
| * Construct a helper for backing up / restoring the files at the given absolute locations |
| * within the file system. |
| * |
| * @param context |
| * @param files |
| */ |
| public AbsoluteFileBackupHelper(Context context, String... files) { |
| super(context); |
| |
| mContext = context; |
| mFiles = files; |
| } |
| |
| /** |
| * Based on oldState, determine which of the files from the application's data directory |
| * need to be backed up, write them to the data stream, and fill in newState with the |
| * state as it exists now. |
| */ |
| public void performBackup(ParcelFileDescriptor oldState, BackupDataOutput data, |
| ParcelFileDescriptor newState) { |
| // use the file paths as the keys, too |
| performBackup_checked(oldState, data, newState, mFiles, mFiles); |
| } |
| |
| /** |
| * Restore one absolute file entity from the restore stream |
| */ |
| public void restoreEntity(BackupDataInputStream data) { |
| if (DEBUG) Log.d(TAG, "got entity '" + data.getKey() + "' size=" + data.size()); |
| String key = data.getKey(); |
| if (isKeyInList(key, mFiles)) { |
| File f = new File(key); |
| writeFile(f, data); |
| } |
| } |
| } |
| |