Method Init

cpp/src/arrow/json/from_string.cc:615–624

  explicit MapConverter(const std::shared_ptr<DataType>& type) { type_ = type; }

  Status Init() override {
    const auto& map_type = checked_cast<const MapType&>(*type_);
    RETURN_NOT_OK(GetConverter(map_type.key_type(), &key_converter_));
    RETURN_NOT_OK(GetConverter(map_type.item_type(), &item_converter_));
    auto key_builder = key_converter_->builder();
    auto item_builder = item_converter_->builder();
    builder_ = std::make_shared<MapBuilder>(default_memory_pool(), key_builder,
                                            item_builder, type_);
    return Status::OK();
  }

  Status AppendValue(const rj::Value& json_obj) override {
    if (json_obj.IsNull()) {