access_element_legacy.h

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#ifndef DDL_STRUCT_ELEMENT_ACCESS_LEGACY_CLASS_HEADER
#define DDL_STRUCT_ELEMENT_ACCESS_LEGACY_CLASS_HEADER
 
#include <a_util/result.h>
#include <ddl/codec/legacy/struct_element.h>
 
namespace ddl {
namespace access_element {

_MAKE_RESULT(-20, ERR_STRUCT_ELEMENT_NOT_FOUND);

template <typename AccessType>
class StructElementLegacy {
public:
    const ddl::StructElement* getStructElement() const
    {
        return &_legacy_struct_element;
    }

    const ddl::StructElement* getStructElement(const AccessType& access, size_t leaf_index) const
    {
        auto codec_index = access.resolve(leaf_index, _legacy_struct_element.name);
        const auto& layout = codec_index.getLayout();
        const auto& type_info = *(layout.type_info);
        _legacy_struct_element.p_enum = type_info.getLegacyAccessEnumType();
        _legacy_struct_element.type =
            static_cast<const a_util::variant::VariantType>(type_info.getType());
        return getStructElement();
    }

    a_util::result::Result getStructElement(const AccessType& access,
                                            size_t leaf_index,
                                            const ddl::StructElement*& struct_element) const
    {
        try {
            struct_element = getStructElement(access, leaf_index);
            return {};
        }
        catch (...) {
            RETURN_ERROR_DESCRIPTION(ERR_STRUCT_ELEMENT_NOT_FOUND, "the struct element was not found");
        }
    }
 
private:
    mutable ddl::StructElement _legacy_struct_element = {};
};
 
} // namespace access_element
} // namespace ddl
 
#endif // DDL_STRUCT_ELEMENT_ACCESS_LEGACY_CLASS_HEADER