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/*
* Copyright (C) 2008 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.util;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* Utility methods for Backup/Restore
* @hide
*/
public class BackupUtils {
public static final int NULL = 0;
public static final int NOT_NULL = 1;
/**
* Thrown when there is a backup version mismatch
* between the data received and what the system can handle
*/
public static class BadVersionException extends Exception {
public BadVersionException(String message) {
super(message);
}
}
public static String readString(DataInputStream in) throws IOException {
return (in.readByte() == NOT_NULL) ? in.readUTF() : null;
}
public static void writeString(DataOutputStream out, String val) throws IOException {
if (val != null) {
out.writeByte(NOT_NULL);
out.writeUTF(val);
} else {
out.writeByte(NULL);
}
}
}
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