c++ 继承方式高内聚read write function操作

代码示例1

#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

struct BaseDevice
{
  BaseDevice(const std::string sType, const std::string sApplication) : strType(sType), strApplication(sApplication)
  {}

  virtual ~BaseDevice();


  std::string strType;
  std::string strApplication;
};
BaseDevice::~BaseDevice() {}

struct GetDeviceInfor : public BaseDevice
{
  GetDeviceInfor(const std::string sType, const std::string sApplication) : BaseDevice(sType, sApplication)
  {}

  virtual ~GetDeviceInfor();
};
GetDeviceInfor::~GetDeviceInfor()
{}

template<class T1>
struct SetDeviceInfor : public BaseDevice
{
  SetDeviceInfor(const std::string sType, const std::string sApplication, T1 iValues):BaseDevice(sType, sApplication), iValues(iValues)
  {}

  ~SetDeviceInfor() 
  {}

  T1 iValues;
};


int main(int argc, char** argv)
{
  std::vector<std::shared_ptr<BaseDevice>> vecDeviceInfor = {
  std::make_shared<GetDeviceInfor>("TemputerData", "FirstScreen"),
  std::make_shared<GetDeviceInfor>("RealValue", "MeasurmentMode"),
  std::make_shared<SetDeviceInfor<std::string>>("MachineValue", "MaintainerMode", "45")
  };

  for (auto pDeviceInfor : vecDeviceInfor)
  {
    if (pDeviceInfor)
    {
      std::shared_ptr<GetDeviceInfor> pGetDeviceTemoInfor = std::dynamic_pointer_cast<GetDeviceInfor>(pDeviceInfor);
      if (pGetDeviceTemoInfor != nullptr)
      {
        std::cout << pGetDeviceTemoInfor->strApplication << std::endl;
      }

      std::shared_ptr<SetDeviceInfor<std::string>> pSetDeviceTemoInfor = std::dynamic_pointer_cast<SetDeviceInfor<std::string>>(pDeviceInfor);
      if (pSetDeviceTemoInfor != nullptr)
      {
        std::cout << pSetDeviceTemoInfor->strApplication << std::endl;
        std::cout << pSetDeviceTemoInfor->iValues << std::endl;
      }
    }
    else
    {
      std::cout << "empty container!" << std::endl;
    }
  }
}

结果如下

在这里插入图片描述

代码示例2

派生类增加传入指定函数

#include <iostream>
#include <fstream>
#include <vector>
#include <functional>

using namespace std;

class StorageClass
{
public:
  StorageClass();
  ~StorageClass();
  void setData(int iData)
  {
    iOperateData = iData;
  }
  void setStringData(std::string sData)
  {
    std::cout << "setData:" << sData << std::endl;
    strData = sData;
  }

  int getData()
  {
    return iOperateData;
  }
  std::string getStringData()
  {
    return strData;
  }

private:
  int iOperateData = 1;
  std::string strData;
};

StorageClass::StorageClass()
{

}

StorageClass::~StorageClass()
{

}

struct BaseDevice
{
  BaseDevice(const std::string sType, const std::string sApplication) : strType(sType), strApplication(sApplication)
  {}

  virtual ~BaseDevice();


  std::string strType;
  std::string strApplication;
};
BaseDevice::~BaseDevice() {}

struct GetDeviceInfor : public BaseDevice
{
  GetDeviceInfor(std::function<int(std::unique_ptr<StorageClass>&)> cFunction, const std::string sType, const std::string sApplication) : BaseDevice(sType, sApplication), cFunction(cFunction)
  {}

  virtual ~GetDeviceInfor();
  std::function<int(std::unique_ptr<StorageClass>&)> cFunction;
};
GetDeviceInfor::~GetDeviceInfor()
{}

template<class T1>
struct SetDeviceInfor : public BaseDevice
{
  SetDeviceInfor(std::function<void(std::unique_ptr<StorageClass>&, T1) > cFunction, const std::string sType, const std::string sApplication, T1 iValues):
    BaseDevice(sType, sApplication), 
    iValues(iValues), 
    cFunction(cFunction)
  {}

  ~SetDeviceInfor() 
  {}

  T1 iValues;
  std::function<void(std::unique_ptr<StorageClass>&, T1) > cFunction;
};


int main(int argc, char** argv)
{
  std::vector<std::shared_ptr<BaseDevice>> vecDeviceInfor = {
  std::make_shared<GetDeviceInfor>(&StorageClass::getData, "TemputerData", "FirstScreen"),
  std::make_shared<GetDeviceInfor>(&StorageClass::getData, "RealValue", "MeasurmentMode"),
  std::make_shared<SetDeviceInfor<std::string>>(&StorageClass::setStringData, "MachineValue", "MaintainerMode", "45")
  };

  for (auto pDeviceInfor : vecDeviceInfor)
  {
    if (pDeviceInfor)
    {
      std::shared_ptr<GetDeviceInfor> pGetDeviceTemoInfor = std::dynamic_pointer_cast<GetDeviceInfor>(pDeviceInfor);
      if (pGetDeviceTemoInfor != nullptr)
      {
        std::cout << pGetDeviceTemoInfor->strApplication << std::endl;

        std::unique_ptr<StorageClass> puniDevice = std::make_unique<StorageClass>();
        int rValue = pGetDeviceTemoInfor->cFunction(puniDevice);
        std::cout << "rValue:" << rValue << std::endl;

      }

      std::shared_ptr<SetDeviceInfor<std::string>> pSetDeviceTemoInfor = std::dynamic_pointer_cast<SetDeviceInfor<std::string>>(pDeviceInfor);
      if (pSetDeviceTemoInfor != nullptr)
      {
        std::cout << pSetDeviceTemoInfor->strApplication << std::endl;
        std::cout << pSetDeviceTemoInfor->iValues << std::endl;

        std::unique_ptr<StorageClass> puniDevice = std::make_unique<StorageClass>();
        pSetDeviceTemoInfor->cFunction(puniDevice, "123");
        std::cout << "GetData:" << puniDevice->getStringData() << std::endl;
      }
    }
    else
    {
      std::cout << "empty container!" << std::endl;
    }
  }
}