convert method

@override List<int>? convert(Object object)

Convert object into UTF-8 encoded JSON.

Implementation

@override
List<int>? convert(Object object) {
  final List<List<int>?> bytes = <List<int>?>[];
  // The `stringify` function always converts into chunks.
  // Collect the chunks into the `bytes` list, then combine them afterwards.
  void addChunk(Uint8List chunk, int start, int end) {
    Uint8List? chunkTmp;
    if (start > 0 || end < chunk.length) {
      final int length = end - start;
      chunkTmp =
          Uint8List.view(chunk.buffer, chunk.offsetInBytes + start, length);
    }
    bytes.add(chunkTmp);
  }

  _JsonUtf8Stringifier.stringify(
      object, _indent, _toEncodable, _bufferSize, addChunk);
  if (bytes.length == 1) {
    return bytes[0];
  }
  int length = 0;
  for (int i = 0; i < bytes.length; i++) {
    length += bytes[i]!.length;
  }
  final Uint8List result = Uint8List(length);
  for (int i = 0, offset = 0; i < bytes.length; i++) {
    final Uint8List byteList = bytes[i] as Uint8List;
    final int end = offset + byteList.length;
    result.setRange(offset, end, byteList);
    offset = end;
  }
  return result;
}