?? proxy.cpp
字號:
/********************************************************************
created: 2006/07/26
filename: Proxy.cpp
author: 李創
http://www.cppblog.com/converse/
purpose: Proxy模式的演示代碼
*********************************************************************/
#include "Proxy.h"
#include <iostream>
RealSubject::RealSubject()
{
std::cout << "Constructing a RealSubject\n";
}
void RealSubject::Request()
{
std::cout << "Request By RealSubject\n";
}
Proxy::Proxy()
: m_pRealSubject(NULL)
{
std::cout << "Constructing a Proxy\n";
}
Proxy::~Proxy()
{
delete m_pRealSubject;
m_pRealSubject = NULL;
}
void Proxy::Request()
{
// 需要使用RealSubject的時候才去初始化
if (NULL == m_pRealSubject)
{
std::cout << "Request By Proxy\n";
m_pRealSubject = new RealSubject();
}
m_pRealSubject->Request();
}
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