由类名创建对象

来源：互联网发布：昆山大数据产业园招聘编辑：程序博客网时间：2024/06/11 20:58

#pragma once

#include "shengli_tool/template_map_str.h"
using namespace SHENGLI::TOOLS;

// 用于声明具有动态创建功能的基类
#define DECLARE_DYNCRT_BASE(base) /
public: /
   typedef base* (*ClassGen)(); /
   static void Register(const char* class_name, ClassGen class_gen) /
   { /
       MapStr<base::ClassGen>& class_set = base::get_class_set();/
       class_set.Set(class_name, class_gen);/
   } /
public:/
   static base* Create(const char* class_name) /
   { /
       base::ClassGen pfun;/
       MapStr<base::ClassGen>& class_set = base::get_class_set();/
       if (class_set.Find(class_name, pfun))/
       {/
           return (pfun)();/
       }/
       return NULL; /
   }/
protected: /
   static MapStr<base::ClassGen>& get_class_set()/
   { /
       static MapStr<base::ClassGen> class_set; /
       return map_set;/
   }/

// 用于实现基类
#define IMPLEMENT_DYNCRT_BASE(base)

// 用于声明一个能够被动态创建的类
#define DECLARE_DYNCRT_CLASS(derived, base) /
public: /
   struct derived##Register /
   { /
       derived##Register() /
       { /
           static bool bRegistered = false; /
           if(!bRegistered) /
           {/
               base::Register(#derived, Create); /
               bRegistered = true; /
           } /
       } /
   }; /
   static base* Create() /
   { /
       return new derived; /
   }

// 用于实现一个能够被动态创建的类
#define IMPLEMENT_DYNCRT_CLASS(derived) /
static derived::derived##Register derived##_for_registering;