content: /*
   * 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);
      }
  }
  