Method operator()

cpp/src/arrow/json/reader.cc:307–324

      : context_(std::move(context)) {}

  Result<DecodedBlock> operator()(const ChunkedBlock& block) const {
    int64_t num_bytes;
    ARROW_ASSIGN_OR_RAISE(auto unconverted, ParseBlock(block, context_->parse_options(),
                                                       context_->pool(), &num_bytes));

    std::shared_ptr<ChunkedArrayBuilder> builder;
    RETURN_NOT_OK(MakeChunkedArrayBuilder(TaskGroup::MakeSerial(), context_->pool(),
                                          context_->promotion_graph(),
                                          context_->conversion_type(), &builder));
    builder->Insert(0, field("", unconverted->type()), unconverted);

    std::shared_ptr<ChunkedArray> chunked;
    RETURN_NOT_OK(builder->Finish(&chunked));
    ARROW_ASSIGN_OR_RAISE(
        auto batch, RecordBatch::FromStructArray(chunked->chunk(0), context_->pool()));

    return DecodedBlock{std::move(batch), num_bytes};
  }

 private:
  std::shared_ptr<const DecodeContext> context_;