76 lines
2.3 KiB
Java
76 lines
2.3 KiB
Java
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.app.backup;
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import android.content.Context;
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import android.os.ParcelFileDescriptor;
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import android.util.Log;
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import java.io.File;
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/**
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* Like FileBackupHelper, but takes absolute paths for the files instead of
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* subpaths of getFilesDir()
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*
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* @hide
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*/
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public class AbsoluteFileBackupHelper extends FileBackupHelperBase implements BackupHelper {
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private static final String TAG = "AbsoluteFileBackupHelper";
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private static final boolean DEBUG = false;
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Context mContext;
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String[] mFiles;
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/**
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* Construct a helper for backing up / restoring the files at the given absolute locations
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* within the file system.
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*
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* @param context
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* @param files
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*/
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public AbsoluteFileBackupHelper(Context context, String... files) {
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super(context);
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mContext = context;
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mFiles = files;
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}
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/**
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* Based on oldState, determine which of the files from the application's data directory
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* need to be backed up, write them to the data stream, and fill in newState with the
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* state as it exists now.
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*/
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public void performBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
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ParcelFileDescriptor newState) {
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// use the file paths as the keys, too
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performBackup_checked(oldState, data, newState, mFiles, mFiles);
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}
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/**
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* Restore one absolute file entity from the restore stream
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*/
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public void restoreEntity(BackupDataInputStream data) {
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if (DEBUG) Log.d(TAG, "got entity '" + data.getKey() + "' size=" + data.size());
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String key = data.getKey();
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if (isKeyInList(key, mFiles)) {
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File f = new File(key);
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writeFile(f, data);
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}
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}
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}
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