设计模式之命令模式[自我理解]

interface ICommand
{
   virtual void Execute() = 0;
};

class ConcreteCmd : public ICommand
{
   Worker m_impl;
   ConcreteCmd(Implement *pImpl):m_impl(pImpl){}
   void Excute()
   { 
      m_impl->DoWork();
   }
};

class Caller
{
    ICommand m_pCmd;

    void AddCmd(ICommand* pCmd){ m_pCmd = pCmd;}

    void Action(){ m_pCmd->Execute();}
}

class  Client

{

ConcreteCmd  *m_pCmd;

Client(Worker impl){ m_pCmd = new ConcreteCmd(impl); }

  ICommand GetCmd(){ return m_pCmd;}

SetCmd(ConcreteCmd* pCmd){ m_pCmd = pCmd; }

}

void main()

{

   Client client = new Client(new Worker);

   Caller caller = new Caller();

   caller.add(client.GetCmd());

   caller.Action():

}

要点：核心是Caller和ICommand,他们实现了任务和实现的分离，Client是辅助，实现接口实现的可适配

看设计模式不能抠字眼，一眼飘过，理解它的抽象和复用机制就行