Method Init

cpp/src/arrow/util/converter.h:132–144

 protected:
  Status Init(MemoryPool* pool) override {
    list_type_ = checked_cast<const ArrowType*>(this->type_.get());
    ARROW_ASSIGN_OR_RAISE(value_converter_,
                          (MakeConverter<BaseConverter, ConverterTrait>(
                              list_type_->value_type(), this->options_, pool)));
    this->builder_ =
        std::make_shared<BuilderType>(pool, value_converter_->builder(), this->type_);
    list_builder_ = checked_cast<BuilderType*>(this->builder_.get());
    // Narrow list types may overflow
    this->may_overflow_ = this->rewind_on_overflow_ =
        sizeof(typename ArrowType::offset_type) < sizeof(int64_t);
    return Status::OK();
  }

  const ArrowType* list_type_;
  BuilderType* list_builder_;