Method DoImport

cpp/src/arrow/c/bridge.cc:1597–1640

  }

  Status DoImport() {
    // Unwrap extension type
    const DataType* storage_type = type_.get();
    if (storage_type->id() == Type::EXTENSION) {
      storage_type =
          checked_cast<const ExtensionType&>(*storage_type).storage_type().get();
    }

    // First import children (required for reconstituting parent array data)
    const auto& fields = storage_type->fields();
    if (c_struct_->n_children != static_cast<int64_t>(fields.size())) {
      return Status::Invalid("ArrowArray struct has ", c_struct_->n_children,
                             " children, expected ", fields.size(), " for type ",
                             type_->ToString());
    }
    child_importers_.reserve(fields.size());
    for (int64_t i = 0; i < c_struct_->n_children; ++i) {
      DCHECK_NE(c_struct_->children[i], nullptr);
      child_importers_.emplace_back(fields[i]->type());
      RETURN_NOT_OK(child_importers_.back().ImportChild(this, c_struct_->children[i]));
    }

    // Import main data
    RETURN_NOT_OK(VisitTypeInline(*storage_type, this));

    bool is_dict_type = (storage_type->id() == Type::DICTIONARY);
    if (c_struct_->dictionary != nullptr) {
      if (!is_dict_type) {
        return Status::Invalid("Import type is ", type_->ToString(),
                               " but dictionary field in ArrowArray struct is not null");
      }
      const auto& dict_type = checked_cast<const DictionaryType&>(*storage_type);
      // Import dictionary values
      ArrayImporter dict_importer(dict_type.value_type());
      RETURN_NOT_OK(dict_importer.ImportDict(this, c_struct_->dictionary));
      data_->dictionary = dict_importer.GetArrayData();
    } else {
      if (is_dict_type) {
        return Status::Invalid("Import type is ", type_->ToString(),
                               " but dictionary field in ArrowArray struct is null");
      }
    }
    return Status::OK();
  }

  Status Visit(const DataType& type) {
    return Status::NotImplemented("Cannot import array of type ", type_->ToString());