/* * 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.backup; import android.content.Context; import android.os.ParcelFileDescriptor; import android.util.Log; import java.io.File; import java.io.FileDescriptor; /** @hide */ public class FileBackupHelper extends FileBackupHelperBase implements BackupHelper { private static final String TAG = "FileBackupHelper"; private static final boolean DEBUG = false; Context mContext; File mFilesDir; String[] mFiles; public FileBackupHelper(Context context, String... files) { super(context); mContext = context; mFilesDir = context.getFilesDir(); 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) { // file names String[] files = mFiles; File base = mContext.getFilesDir(); final int N = files.length; String[] fullPaths = new String[N]; for (int i=0; i<N; i++) { fullPaths[i] = (new File(base, files[i])).getAbsolutePath(); } // go performBackup_checked(oldState, data, newState, fullPaths, files); } 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(mFilesDir, key); writeFile(f, data); } } }