#pragma once
class SHAcDbLayerTableRecPtr 
{
public:

	SHAcDbLayerTableRecPtr(const TCHAR *pszLayer, AcDb::OpenMode opMode);

	~SHAcDbLayerTableRecPtr();

	int operator !() ;

	operator AcDbLayerTableRecord & ();

public:

	AcDbLayerTableRecord *m_pLayer;
};

inline SHAcDbLayerTableRecPtr::SHAcDbLayerTableRecPtr(const TCHAR *pszLayer, AcDb::OpenMode opMode)
: m_pLayer(NULL)
{
	AcDbLayerTable *pLayerTable;
	Acad::ErrorStatus es = acdbCurDwg()->getLayerTable(pLayerTable,  AcDb::kForRead);
	if (es != Acad::eOk) 
	{
		return;
	}
	
	es = pLayerTable->getAt(pszLayer, m_pLayer, opMode);
	pLayerTable->close();
}

inline SHAcDbLayerTableRecPtr::~SHAcDbLayerTableRecPtr()
{
	if (m_pLayer)
	{
		m_pLayer->close();
	}
}

inline int SHAcDbLayerTableRecPtr::operator !() 
{
	return !m_pLayer;
}

inline SHAcDbLayerTableRecPtr::operator AcDbLayerTableRecord & ()
{
	assert(m_pLayer);
	
	return *m_pLayer;
}