| /* |
| * Copyright (C) 2018 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.chunking; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** Writer that formats a Diff Script and writes it to an output source. */ |
| interface DiffScriptWriter { |
| /** Adds a new byte to the diff script. */ |
| void writeByte(byte b) throws IOException; |
| |
| /** Adds a known chunk to the diff script. */ |
| void writeChunk(long chunkStart, int chunkLength) throws IOException; |
| |
| /** Indicates that no more bytes or chunks will be added to the diff script. */ |
| void flush() throws IOException; |
| |
| interface Factory { |
| DiffScriptWriter create(OutputStream outputStream); |
| } |
| } |