Method Init

cpp/src/arrow/util/converter.h:165–185

 protected:
  Status Init(MemoryPool* pool) override {
    std::unique_ptr<BaseConverter> child_converter;
    std::vector<std::shared_ptr<ArrayBuilder>> child_builders;

    struct_type_ = checked_cast<const StructType*>(this->type_.get());
    for (const auto& field : struct_type_->fields()) {
      ARROW_ASSIGN_OR_RAISE(child_converter,
                            (MakeConverter<BaseConverter, ConverterTrait>(
                                field->type(), this->options_, pool)));
      this->may_overflow_ |= child_converter->may_overflow();
      this->rewind_on_overflow_ = this->may_overflow_;
      child_builders.push_back(child_converter->builder());
      children_.push_back(std::move(child_converter));
    }

    this->builder_ =
        std::make_shared<StructBuilder>(this->type_, pool, std::move(child_builders));
    struct_builder_ = checked_cast<StructBuilder*>(this->builder_.get());

    return Status::OK();
  }

  const StructType* struct_type_;
  StructBuilder* struct_builder_;