aggregate.cpp

设计模式之Iterator

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

Aggregate::Aggregate() 
{
}

Aggregate::~Aggregate() 
{
}

ConcreteAggregate::ConcreteAggregate() 
{ 
	for (int i = 0; i < SIZE; i++) 
		_objs[i] = i; 
}

ConcreteAggregate::~ConcreteAggregate() 
{
}

Iterator* ConcreteAggregate::CreateIterator() 
{ 
	return new ConcreteIterator(this); 
}

Object ConcreteAggregate::GetItem(int idx) 
{
	if (idx < this->GetSize()) 
		return _objs[idx]; 
	else
		return -1; 
}

int ConcreteAggregate::GetSize() 
{ 
	return SIZE; 
}