Method readBytes

guava/src/com/google/common/io/ByteStreams.java:893–907

Process the bytes of the given input stream using the given processor. @param input the input stream to process @param processor the object to which to pass the bytes of the stream @return the result of the byte processor @throws IOException if an I/O error occurs @since 14.0

(
      InputStream input, ByteProcessor<T> processor)

   * @since 14.0
   */
  @CanIgnoreReturnValue // some processors won't return a useful result
  @ParametricNullness
  @J2ktIncompatible
  public static <T extends @Nullable Object> T readBytes(
      InputStream input, ByteProcessor<T> processor) throws IOException {
    checkNotNull(input);
    checkNotNull(processor);

    byte[] buf = createBuffer();
    int read;
    do {
      read = input.read(buf);
    } while (read != -1 && processor.processBytes(buf, 0, read));
    return processor.getResult();
  }

  /**
   * Reads some bytes from an input stream and stores them into the buffer array {@code b}. This