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/*
* 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.encryption;
import java.io.IOException;
/** Interface for classes which will provide backup data */
public abstract class FullRestoreDownloader {
/** Enum to provide information on why a download finished */
public enum FinishType {
UNKNOWN_FINISH(0),
// Finish the downloading and successfully write data to Android OS.
FINISHED(1),
// Download failed with any kind of exception.
TRANSFER_FAILURE(2),
// Download failed due to auth failure on the device.
AUTH_FAILURE(3),
// Aborted by Android Framework.
FRAMEWORK_ABORTED(4);
private int mValue;
FinishType(int value) {
mValue = value;
}
}
/** Get the next data chunk from the backing store */
public abstract int readNextChunk(byte[] buffer) throws IOException;
/** Called when we've finished restoring the data */
public abstract void finish(FinishType finishType);
}
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