//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TAcDbBlockTableRecPtr.h
// = Version	:   ver2.0
// = Author		:   xlc
// = CreateDate	:   2002-09-09
// = Description:   ÀàµÄÉùÃ÷
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _TACDBBLOCKTABLERECPTR_H_
#define _TACDBBLOCKTABLERECPTR_H_

class GEOAPI TAcDbBlockTableRecPtr 
{
public:

	TAcDbBlockTableRecPtr(const TCHAR *pszBlock = ACDB_MODEL_SPACE, 
		AcDb::OpenMode opMode = AcDb::kForRead, AcDbDatabase *pDb = NULL);

	TAcDbBlockTableRecPtr(const AcDbObjectId &id, AcDb::OpenMode opMode = AcDb::kForRead);

	~TAcDbBlockTableRecPtr();

	int operator !();

	operator AcDbBlockTableRecord & ();

	void Close();

public:
	
	AcDbBlockTableRecord *m_pBlockTableRec;
};

inline TAcDbBlockTableRecPtr::TAcDbBlockTableRecPtr(const AcDbObjectId &id, AcDb::OpenMode opMode)
: m_pBlockTableRec(NULL)
{
	acdbOpenObject(m_pBlockTableRec, id, opMode);
}

inline TAcDbBlockTableRecPtr::TAcDbBlockTableRecPtr(const TCHAR *pszBlock, AcDb::OpenMode opMode,
											 AcDbDatabase *pDb)
											 : m_pBlockTableRec(NULL)
{
	if (!pDb)
	{
		pDb = acdbCurDwg();
	}
	
	AcDbBlockTable *pBlockTable;
	Acad::ErrorStatus es = pDb->getBlockTable(pBlockTable,  AcDb::kForRead);
	if (es != Acad::eOk) 
	{
		return;
	}
	
	es = pBlockTable->getAt(pszBlock, m_pBlockTableRec, opMode);
	pBlockTable->close();
}

inline TAcDbBlockTableRecPtr::~TAcDbBlockTableRecPtr()
{
	if (m_pBlockTableRec) 
	{
		m_pBlockTableRec->close();
	}
}

inline int TAcDbBlockTableRecPtr::operator !() 
{
	return !m_pBlockTableRec;
}

inline void TAcDbBlockTableRecPtr::Close()
{
	if (m_pBlockTableRec)
	{
		m_pBlockTableRec->close();
	}
	
	m_pBlockTableRec = NULL;
}

inline TAcDbBlockTableRecPtr::operator AcDbBlockTableRecord & ()
{
	assert(m_pBlockTableRec);
	
	return *m_pBlockTableRec;
}

#endif