ROWINFO.CPP

//-------------------------------------------------------------------- 
// Microsoft OLE DB Sample Provider 
// (C) Copyright 1994 - 1996 Microsoft Corporation.  All Rights Reserved. 
// 
// @doc 
// 
// @module ROWINFO.CPP | IRowsetInfo interface implementation 
// 
 
// Includes ------------------------------------------------------------------ 
 
#include "headers.h" 
 
// Code ---------------------------------------------------------------------- 
 
 
// IRowsetInfo specific methods 
 
// CImpIRowsetInfo::GetReferencedRowset ---------------------------------------------------- 
// 
// @mfunc Returns an interface pointer to the rowset to which the bookmark 
// applies 
// 
// @rdesc HRESULT 
//      @flag DB_E_NOTAREFERENCECOLUMN| This rowset does not support bookmarks 
// 
STDMETHODIMP CImpIRowsetInfo::GetReferencedRowset 
    ( 
    ULONGiOrdinal,//@parm IN| Bookmark Column 
    REFIIDriid,//@parm IN| ID of the interface pointer to return 
IUnknown **ppReferencedRowset//@parm OUT | IRowset Interface Pointer 
    ) 
{ 
    // Since we don't support bookmarks, this will alway return 
    // an error 
    return ResultFromScode( DB_E_NOTAREFERENCECOLUMN ); 
} 
 
 
 
// CImpIRowsetInfo::GetProperties ---------------------------------------------------- 
// 
// @mfunc Returns current settings of all properties supported by the rowset 
// 
// @rdesc HRESULT 
//      @flag S_OK          | The method succeeded 
//      @flag E_INVALIDARG  | pcProperties or prgProperties was NULL 
//      @flag E_OUTOFMEMORY | Out of memory 
// 
STDMETHODIMP CImpIRowsetInfo::GetProperties 
    ( 
    const ULONG         cPropertySets,//@parm IN | # of property sets 
    const DBPROPIDSETrgPropertySets[],//@parm IN | Array of DBPROPIDSET 
    ULONG*              pcProperties,//@parm OUT | count of properties returned 
    DBPROPSET**prgProperties//@parm OUT | property information returned 
    ) 
{ 
    assert( m_pObj ); 
    assert( m_pObj->m_pUtilProp ); 
 
    // just pass this call on to the utility object that manages our properties 
    return m_pObj->m_pUtilProp->GetProperties( cPropertySets, rgPropertySets, 
                pcProperties, prgProperties ); 
} 
 
 
 
// CImpIRowsetInfo::GetSpecification --------------------------------------- 
// 
// @mfunc Returns the interface pointer of the object that created the rowset 
// 
// @rdesc HRESULT 
//      @flag S_OK          | Method Succeeded 
//      @flag E_INVALIDARG  | Invalid parameters were specified 
// 
STDMETHODIMP CImpIRowsetInfo::GetSpecification 
    ( 
    REFIID   riid,              //@parm IN | Interface ID of the interface being queried for. 
    IUnknown **ppSpecification  //@parm OUT | Pointer to interface that instantiated this object 
    ) 
{ 
HRESULT hr=S_OK; 
 
    if (NULL == ppSpecification) 
        return ResultFromScode( E_INVALIDARG ); 
 
    // we do not have an interface pointer on the object that created this rowset, yet. 
    *ppSpecification = NULL; 
 
if (m_pObj->m_pCreator) 
   hr = m_pObj->m_pCreator->QueryInterface (riid,(void**)ppSpecification); 
 
return hr; 
}