1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.backup;
18
19import android.content.Context;
20import android.os.ParcelFileDescriptor;
21import android.util.Log;
22
23import java.io.File;
24import java.io.FileDescriptor;
25
26/**
27 * Like FileBackupHelper, but takes absolute paths for the files instead of
28 * subpaths of getFilesDir()
29 *
30 * @hide
31 */
32public class AbsoluteFileBackupHelper extends FileBackupHelperBase implements BackupHelper {
33    private static final String TAG = "AbsoluteFileBackupHelper";
34    private static final boolean DEBUG = false;
35
36    Context mContext;
37    String[] mFiles;
38
39    public AbsoluteFileBackupHelper(Context context, String... files) {
40        super(context);
41
42        mContext = context;
43        mFiles = files;
44    }
45
46    /**
47     * Based on oldState, determine which of the files from the application's data directory
48     * need to be backed up, write them to the data stream, and fill in newState with the
49     * state as it exists now.
50     */
51    public void performBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
52            ParcelFileDescriptor newState) {
53        // use the file paths as the keys, too
54        performBackup_checked(oldState, data, newState, mFiles, mFiles);
55    }
56
57    public void restoreEntity(BackupDataInputStream data) {
58        if (DEBUG) Log.d(TAG, "got entity '" + data.getKey() + "' size=" + data.size());
59        String key = data.getKey();
60        if (isKeyInList(key, mFiles)) {
61            File f = new File(key);
62            writeFile(f, data);
63        }
64    }
65}
66
67