handle.cpp

c++程序

//Handle.cpp
#include "Handle.h"
#include <iostream>
using namespace std;

Handle::Handle() 
{ 
	_succ = 0; 
}

Handle::~Handle() 
{ 
	delete _succ;
}

Handle::Handle(Handle* succ) 
{ 
	this->_succ = succ; 
}

void Handle::SetSuccessor(Handle* succ) 
{ 
	_succ = succ; 
}

Handle* Handle::GetSuccessor() 
{ 
	return _succ; 
}

void Handle::HandleRequest() 
{
}

ConcreteHandleA::ConcreteHandleA() 
{
}

ConcreteHandleA::ConcreteHandleA(Handle* succ):Handle(succ) 
{

}

ConcreteHandleA::~ConcreteHandleA() 
{
}

void ConcreteHandleA::HandleRequest() 
{ 
	if (this->GetSuccessor() != 0) 
	{ 
		cout<<"ConcreteHandleA 我把处理权给后继节点....."
			<<endl;
		this->GetSuccessor()->HandleRequest(); 
	}
	else 
	{ 
		cout<<"ConcreteHandleA 没有后继了，我必须自己处理...."
			<<endl; 
	} 
}

ConcreteHandleB::ConcreteHandleB() 
{
}

ConcreteHandleB::ConcreteHandleB(Handle* succ):Handle(succ) 
{
}

ConcreteHandleB::~ConcreteHandleB() 
{
}

void ConcreteHandleB::HandleRequest() 
{ 
	if (this->GetSuccessor() != 0) 
	{ 
		cout<<"ConcreteHandleB 我把处理权给后继节点....."
			<<endl; 
		this->GetSuccessor()->HandleRequest(); 
	} 
	else 
	{ 
		cout<<"ConcreteHandleB 没有后继了，我必须自己处理...."
			<<endl;
	}
}