//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGraphNode.h
// = Version	:   ver2.0
// = Author		:   xlc
// = CreateDate	:   2002-09-09
// = Description:   类的声明
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _TGRAPHNODE_H_
#define _TGRAPHNODE_H_

#ifndef _TWFLAG_H_
#include "TWFlag.h"
#endif

#ifndef _TTABLE_H_
#include "TTable.h"
#endif

#ifndef _TGRAPHARC_H_
#include "TGraphArc.h"
#endif

#ifndef _TPDLIST_H_
#include "TPDList.h"
#endif

//图节点
class GEOAPI TGraphNode:public TWFlag
{
public:
	//删除时自动断开连接
	virtual ~TGraphNode();
	virtual int CmpNode(const TGraphNode&n) const;

	//pArc->IsValid()!!!
	bool AppendArc(TGraphArc*pArc);
	bool RemoveArc(TGraphArc*pArc);

	void ClearArc();
	//断开连接
	void UnConnect();
	//最后pNode被ClearArc
	void Conbine(TGraphNode*pNode);

	//ARC
	//是否孤点
	bool IsAloneNode() const;
	//是否端点（只有一条边）
	bool IsEndNode() const;
	long GetArcNum() const;

	TGraphArc* GetArc(long i) const;

	long FindArc(TGraphArc*pArc) const;

	//如果只有一条边或未找到pArc返回NULL
	TGraphArc* FindNextArc(TGraphArc*pArc);

	//如果只有一条边或未找到pArc返回NULL
	TGraphArc* FindPreArc(TGraphArc*pArc);

	void GetArcOut(TTable<TGraphArc*> &lstArc);
	void GetArcIn(TTable<TGraphArc*> &lstArc);

	//Compare
	bool operator==(const TGraphNode&n) const;
	bool operator!=(const TGraphNode&n) const;
	bool operator> (const TGraphNode&n) const;
	bool operator< (const TGraphNode&n) const;

protected:
	//此结点连接的所有边（实质是引用）,始终保持有序
	TPDList<TGraphArc> m_allArc;

	//节点内排序时使用，其它情况为NULL
	static TGraphNode* s_pStartNode;
};

#endif