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/*
* 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";
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) {
// TODO: turn this off before ship
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);
}
}
}
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