如何让可插拔工厂与Lua配合使用？

将class data如下所示:

struct Base_data
{
public:
    Base_data(){
        protocolname = "Base";
    }
    string protocolname;
};

class HttpData : public Base_data
{
public:
    HttpData(){
        protocolname = "Http";
    }
};

将class Professor如下所示:

class Base_Professor
{
public:
    void Process(Base_data &data)
    {
        std::map::const_iterator it = ListProfessor.find(data.protocolname);
        if(it == ListProfessor.end())
            cout second->Do(data);
    }

    virtual void Do(Base_data &data){}

    virtual std::string GetProfessorname(){
        return "Base";
    }

    ~Base_Professor(){
        std::map::const_iterator it;
        for(it = ListProfessor.begin(); it != ListProfessor.end(); ++it)
            delete it->second;
    }
    bool Register(Base_Professor *Professor){
        std::map::const_iterator it = ListProfessor.find(Professor->GetProfessorname());
        if(it != ListProfessor.end())
            return false;
        ListProfessor.insert(std::make_pair(Professor->GetProfessorname(), Professor));
    }
private:
    std::map ListProfessor;
};

class HttpProfessor : public Base_Professor
{
public:
    std::string GetProfessorname(){
        return "Http";
    }
    void Do(Base_data &data){
        std::cout

我可以通过继承Base_Professor和注册新类来添加新协议，但我不知道如何在lua中实现。 你有什么好的想法吗？