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.InputStream;
  import java.security.GeneralSecurityException;
  
  /** Splits an input stream into chunks, which are to be encrypted separately. */
  public interface Chunker {
      /**
       * Splits the input stream into chunks.
       *
       * @param inputStream The input stream.
       * @param chunkConsumer A function that processes each chunk as it is produced.
       * @throws IOException If there is a problem reading the input stream.
       * @throws GeneralSecurityException if the consumer function throws an error.
       */
      void chunkify(InputStream inputStream, ChunkConsumer chunkConsumer)
              throws IOException, GeneralSecurityException;
  
      /** Function that consumes chunks. */
      interface ChunkConsumer {
          /**
           * Invoked for each chunk.
           *
           * @param chunk Plaintext bytes of chunk.
           * @throws GeneralSecurityException if there is an issue encrypting the chunk.
           */
          void accept(byte[] chunk) throws GeneralSecurityException;
      }
  }
  