aggregate.h

设计模式之Iterator

#ifndef _AGGREGATE_H_ 
#define _AGGREGATE_H_

class Iterator;

typedef int Object;

class Interator;

class Aggregate 
{ 
public: 
	virtual ~Aggregate();
	virtual Iterator* CreateIterator() = 0;
	virtual Object GetItem(int idx) = 0;
	virtual int GetSize() = 0;
protected: 
	Aggregate();
private:
};

class ConcreteAggregate:public Aggregate 
{ 
public: 
	enum {SIZE = 3};
	ConcreteAggregate();
	~ConcreteAggregate();
	Iterator* CreateIterator();
	Object GetItem(int idx);
	int GetSize();
protected:
private: 
	Object _objs[SIZE];
};

#endif