| /* |
| * Copyright (C) 2019 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 com.android.server.backup.utils; |
| |
| import static com.android.server.backup.BackupManagerService.TAG; |
| |
| import android.util.Slog; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| |
| /** Utility methods useful for working with backup related RandomAccessFiles. */ |
| public final class RandomAccessFileUtils { |
| private static RandomAccessFile getRandomAccessFile(File file) throws FileNotFoundException { |
| return new RandomAccessFile(file, "rwd"); |
| } |
| |
| /** Write a boolean to a File by wrapping it using a RandomAccessFile. */ |
| public static void writeBoolean(File file, boolean b) { |
| try (RandomAccessFile af = getRandomAccessFile(file)) { |
| af.writeBoolean(b); |
| } catch (IOException e) { |
| Slog.w(TAG, "Error writing file:" + file.getAbsolutePath(), e); |
| } |
| } |
| |
| /** Read a boolean from a File by wrapping it using a RandomAccessFile. */ |
| public static boolean readBoolean(File file, boolean def) { |
| try (RandomAccessFile af = getRandomAccessFile(file)) { |
| return af.readBoolean(); |
| } catch (IOException e) { |
| Slog.w(TAG, "Error reading file:" + file.getAbsolutePath(), e); |
| } |
| return def; |
| } |
| } |