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/*************************************************************************
*
* $RCSfile: Aolewrap.hxx,v $
*
* $Revision: 1.1.1.1 $
*
* last change: $Author: hr $ $Date: 2000-09-18 16:14:25 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#ifndef _CONNECTIVITY_ADO_AOLEWRAP_HXX_
#define _CONNECTIVITY_ADO_AOLEWRAP_HXX_
#ifndef _OSL_DIAGNOSE_H_
#include <osl/diagnose.h>
#endif
namespace connectivity
{
namespace ado
{
//////////////////////////////////////////////////////////////////////////
//
// Template-Klasse WpOLEBase<class T>
// ==================================
//
// Objekte dieser Klasse hlt einen Zeiger auf ein Interface vom Typ T.
// Es gibt Konstruktoren und Zuweisungsoperator die sicherstellen, dass
// AddRef() und Release() entsprechend den COM-Konventionen gerufen werden.
// Ein Objekt kann auch keinen Zeiger halten (Nullzeiger), dann ergibt
// der Aufruf von IsValid() FALSE.
//
// Um effizientes pass-by-value machen zu koennen, ist diese (ebenso wie die
// abgeleiteten Klassen) eine ganz schmale Wrapper-Klasse unter Vermeidung
// virtueller Methoden und mit Inlining.
//------------------------------------------------------------------------
template<class T> class WpOLEBase
{
protected:
T* pInterface;
public:
WpOLEBase();
WpOLEBase(T* pInt);
//inline
WpOLEBase<T>& operator=(const WpOLEBase<T>& rhs)
{
if (rhs.pInterface != pInterface)
{
if (pInterface) pInterface->Release();
pInterface = rhs.pInterface;
if (pInterface) pInterface->AddRef();
}
return *this;
};
WpOLEBase<T>& operator=(T* rhs)
{
if (pInterface != rhs)
{
if (pInterface) pInterface->Release();
pInterface = rhs;
if (pInterface) pInterface->AddRef();
}
return *this;
}
WpOLEBase(const WpOLEBase<T>& aWrapper)
{
operator=(aWrapper);
}
virtual ~WpOLEBase()
{
if (pInterface)
{
pInterface->Release();
pInterface = NULL;
}
}
inline void clear()
{
if (pInterface)
{
pInterface->Release();
pInterface = NULL;
}
}
inline sal_Bool IsValid() const {return pInterface != NULL;};
operator IDispatch*() { return pInterface; }
operator T*() { return pInterface; }
};
template<class T> WpOLEBase<T>::WpOLEBase<T>()
{
pInterface = NULL;
};
template<class T> WpOLEBase<T>::WpOLEBase<T>(T* pInt)
{
pInterface = pInt;
};
// kein AddRef(), da
// der nach Konvention von der erz. Methode
// schon durchgefhrt wurde.
//////////////////////////////////////////////////////////////////////////
//
// Template-Klasse WpOLECollection<class Ts, class T, class WrapT>
// ===============================================================
//
// Diese Klasse, welche sich von WpOLEBase<Ts> ableitet, abstrahiert die
// den DAO-Collections gemeinsamen Eigenschaften:
//
// Sie werden ber ein Interface Ts (etwa: DAOFields) angesprochen
// und koennen ueber get_Item (hier:GetItem) Items des Typs T (genauer:
// mit Interface T, etwa DAOField) herausgeben.
//
// Diese Wrapperklasse gibt aber nicht ein Interface T heraus,
// sondern ein Objekt der Klasse WrapT. Dieses mu eine Konstruktion
// durch T zulassen, vorzugsweise ist es von WpOLEBase<T> abgeleitet.
//
//------------------------------------------------------------------------
template<class Ts, class T, class WrapT> class WpOLECollection: public WpOLEBase<Ts>
{
public:
// Konstruktoren, operator=
// diese rufen nur die Oberklasse
WpOLECollection(Ts* pInt):WpOLEBase<Ts>(pInt){}
WpOLECollection(const WpOLECollection& rhs){operator=(rhs);}
inline WpOLECollection& operator=(const WpOLECollection& rhs)
{WpOLEBase<Ts>::operator=(rhs); return *this;};
//////////////////////////////////////////////////////////////////////
inline void Refresh(){pInterface->Refresh();};
inline sal_Int32 GetItemCount() const
{
sal_Int32 nCount = 0;
pInterface->get_Count(&nCount);
return nCount;
};
inline WrapT GetItem(sal_Int32 index) const
{
OSL_ENSHURE(index >= 0 && index<GetItemCount(),"Wrong index for field!");
T* pT;
if (FAILED(pInterface->get_Item(OLEVariant(index), &pT))) return WrapT(NULL);
return WrapT(pT);
};
inline WrapT GetItem(const ::rtl::OUString& sStr) const
{
T* pT;
if (FAILED(pInterface->get_Item(OLEVariant(sStr), &pT))) return WrapT(NULL);
return WrapT(pT);
}
};
template<class Ts, class T, class WrapT> class WpOLEAppendCollection:
public WpOLECollection<Ts,T,WrapT>
{
public:
// Konstruktoren, operator=
// diese rufen nur die Oberklasse
WpOLEAppendCollection(Ts* pInt):WpOLECollection<Ts,T,WrapT>(pInt){}
WpOLEAppendCollection(const WpOLEAppendCollection& rhs){operator=(rhs);}
inline WpOLEAppendCollection& operator=(const WpOLEAppendCollection& rhs)
{WpOLEBase<Ts>::operator=(rhs); return *this;};
//////////////////////////////////////////////////////////////////////
inline sal_Bool Append(WrapT aWrapT)
{
return SUCCEEDED(pInterface->Append(aWrapT.pInterface));
};
inline sal_Bool Delete(const ::rtl::OUString& sName)
{
return SUCCEEDED(pInterface->Delete(OLEVariant(sName)));
};
};
}
}
#endif // _CONNECTIVITY_ADO_AOLEWRAP_HXX_
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