DBSESS.H

//-------------------------------------------------------------------- 
// Microsoft OLE DB Sample Provider  
// (C) Copyright 1994 - 1996 Microsoft Corporation.  All Rights Reserved. 
// 
// @doc 
// 
// @module DBSESS.H | CDBSession base object and contained interface 
// definitions 
// 
// 
#ifndef _DBSESS_H_ 
#define _DBSESS_H_ 
 
 
 
// Forward declarations ------------------------------------------------------ 
 
class   CImpIGetDataSource; 
class   CImpIOpenRowset; 
classCImpISessionProperties; 
typedef CImpIGetDataSource*PIMPIGETDATASOURCE; 
typedef CImpIOpenRowset*PIMPIOPENROWSET; 
typedef CImpISessionProperties*PIMPISESSIONPROPERTIES; 
 
// Classes ------------------------------------------------------------------- 
 
//---------------------------------------------------------------------------- 
// @class CDBSession | Containing class for all interfaces on the DBSession  
// Object 
// 
class CDBSession : public IUnknown//@base public | IUnknown 
{ 
    // contained interfaces are friends 
    friend class CImpIGetDataSource; 
    friend class CImpIOpenRowset; 
    friend class CImpIDataSource; 
    friend class CImpISessionProperties; 
 
protected: //@access protected 
//@cmember Reference count 
ULONGm_cRef; 
//@cmember Controlling IUnknown 
LPUNKNOWNm_pUnkOuter; 
//@cmember Path Name 
charm_szPath[MAX_PATH]; 
        //@member flag is TRUE if Rowset has been created 
        BOOL                        m_fRowsetCreated; 
        //@member Utility object to manage properties 
        PCUTILPROP                  m_pUtilProp; 
 
        //@member contained IOpenRowset 
        PIMPIOPENROWSET             m_pIOpenRowset; 
 
//@member contained IGetDataSource 
PIMPIGETDATASOURCEm_pIGetDataSource; 
 
//@member contained ISessionProperties 
PIMPISESSIONPROPERTIESm_pISessionProperties; 
 
public: //@access public 
//@cmember Constructor  
 CDBSession(LPUNKNOWN); 
//@cmember Destructor 
~CDBSession(void); 
 
//@mcember parent data source object 
PCDATASOURCEm_pCDataSource; 
 
//@cmember Intitialization Routine 
BOOL FInit( char* szPath, CDataSource*pCDataSource ); 
 
 
//Object's base IUnknown 
//@cmember Request an Interface 
STDMETHODIMPQueryInterface(REFIID, LPVOID *); 
//@cmember Increments the Reference count 
STDMETHODIMP_(ULONG)AddRef(void); 
//@cmember Decrements the Reference count 
STDMETHODIMP_(ULONG)Release(void); 
 
inline void RowsetDestroyed() { m_fRowsetCreated = FALSE; }; 
}; 
 
typedef CDBSession *PCDBSESSION; 
 
 
//---------------------------------------------------------------------------------------- 
// @class CImpIGetDataSource   | contained IGetDataSource class 
 
 
class CImpIGetDataSource : public IGetDataSource      //@base public | IGetDataSource 
{ 
private:        //@access private 
DEFINE_DEFAULT_IUNKNOWN_MEMBER_DATA(CDBSession) 
 
public:         //@access public 
 DEFINE_DEFAULT_IUNKNOWN_CTOR_DTOR(CDBSession, CImpIGetDataSource); 
DEFINE_DEFAULT_IUNKNOWN_ADDREF_RELEASE 
 
        
        // IGetDataSource method 
        //@cmember GetDataSource 
STDMETHODIMP  GetDataSource( REFIID, IUnknown** ); 
}; 
 
//---------------------------------------------------------------------------------------- 
// @class CImpIOpenRowset   | contained IOpenRowset class 
 
 
class CImpIOpenRowset : public IOpenRowset      //@base public | IOpenRowset 
{ 
private:        //@access private 
DEFINE_DEFAULT_IUNKNOWN_MEMBER_DATA(CDBSession) 
 
public:         //@access public 
 DEFINE_DEFAULT_IUNKNOWN_CTOR_DTOR(CDBSession, CImpIOpenRowset); 
DEFINE_DEFAULT_IUNKNOWN_ADDREF_RELEASE 
 
        
        // IOpenRowset method 
        //@cmember OpenRowset 
STDMETHODIMP  OpenRowset( IUnknown*, DBID*, DBID*, REFIID, ULONG, DBPROPSET[], IUnknown** ); 
}; 
 
 
//---------------------------------------------------------------------------- 
// @class CImpISessionProperties | Contained ISessionProperties class 
// 
class CImpISessionProperties : public ISessionProperties//@base public | ISessionProperties 
{ 
private:        //@access private 
DEFINE_DEFAULT_IUNKNOWN_MEMBER_DATA(CDBSession) 
 
public:         //@access public 
 DEFINE_DEFAULT_IUNKNOWN_CTOR_DTOR(CDBSession, CImpISessionProperties); 
DEFINE_DEFAULT_IUNKNOWN_ADDREF_RELEASE 
 
//IDBProperties member functions 
 
        //@cmember GetProperties method 
        STDMETHODIMP GetProperties 
        ( 
ULONGcPropertySets, 
      const DBPROPIDSETrgPropertySets[],  
        ULONG*              pcProperties,  
 DBPROPSET**prgProperties      
        ); 
 
 
        //@cmember SetProperties method 
        STDMETHODIMPSetProperties 
 ( 
ULONGcProperties, 
 DBPROPSETrgProperties[]      
); 
}; 
 
#endif