IPERSISTSTREAM.H

#ifndef _IPERSISTSTREAM_H 
#define _IPERSISTSTREAM_H 
 
////////////////////////////////////////////////////////////////////////////// 
// IMyPersistStream 
// Implements IPersistStream as a template class.  
// 
// ToDo: Derive your own class form this class and implement the methods 
//IMyPersistStreamImpl_Load 
//IMyPersistStreamImpl_Save 
//IMyPersistStreamImpl_GetSizeMax 
// and the member variable 
//m_bRequiresSave 
//////////////////////////////////////////////////////////////////////////////  
template <class T> 
class ATL_NO_VTABLE IMyPersistStreamImpl 
{ 
public: 
// IUnknown 
// 
STDMETHOD(QueryInterface)(REFIID riid, void ** ppvObject) = 0; 
_ATL_DEBUG_ADDREF_RELEASE_IMPL(IMyPersistStreamImpl) 
 
// IPersist 
STDMETHOD(GetClassID)(CLSID *pClassID) 
{ 
ATLTRACE(_T("IMyPersistStreamImpl::GetClassID\n")); 
T* pT = static_cast<T*>(this); 
*pClassID = pT->GetObjectCLSID(); 
return S_OK; 
} 
 
// IPersistStream 
STDMETHOD(IsDirty)() 
{ 
ATLTRACE(_T("IMyPersistStreamImpl::IsDirty\n")); 
T* pT = static_cast<T*>(this); 
return (pT->m_bRequiresSave) ? S_OK : S_FALSE; 
} 
STDMETHOD(Load)(LPSTREAM pStm) 
{ 
ATLTRACE(_T("IMyPersistStreamImpl::Load\n")); 
T* pT = static_cast<T*>(this); 
return pT->IMyPersistStreamImpl_Load(pStm); 
} 
STDMETHOD(Save)(LPSTREAM pStm, BOOL fClearDirty) 
{ 
T* pT = static_cast<T*>(this); 
ATLTRACE(_T("IMyPersistStreamImpl::Save\n")); 
return pT->IMyPersistStreamImpl_Save(pStm, fClearDirty); 
} 
STDMETHOD(GetSizeMax)(ULARGE_INTEGER FAR* pcbSize ) 
{ 
T* pT = static_cast<T*>(this); 
ATLTRACE(_T("IMyPersistStreamImpl::GetSizeMax\n")); 
return pT->IMyPersistStreamImpl_GetSizeMax(pcbSize); 
} 
 
}; 
 
#endif