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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef COMPTR_HXX
#define COMPTR_HXX
#include <sal/types.h>
#include <osl/diagnose.h>
#include <shobjidl.h>
template< class T_INTERFACE ,
REFIID P_IID = IID_NULL ,
REFCLSID P_CLSID = CLSID_NULL >
class ComPtr
{
public:
//---------------------------------------------------------------------
/** initialize com ptr with null.
*/
ComPtr()
{
m_pInterface = NULL;
}
//---------------------------------------------------------------------
/** initialize com ptr with given interface.
*/
ComPtr(T_INTERFACE* pInterface)
{
m_pInterface = pInterface;
if (m_pInterface)
m_pInterface->AddRef();
}
//---------------------------------------------------------------------
/** copy ctor.
*/
ComPtr(const ComPtr< T_INTERFACE, P_IID, P_CLSID >& aCopy)
{
m_pInterface = aCopy.m_pInterface;
if (m_pInterface)
m_pInterface->AddRef();
}
//---------------------------------------------------------------------
/** initialize object by quering external object for the right interface.
*/
ComPtr(IUnknown* pIUnknown)
{
if (pIUnknown)
pIUnknown->QueryInterface(P_IID, (void**)&m_pInterface);
}
//---------------------------------------------------------------------
/** deinitialize com object right.
*/
~ComPtr()
{
release();
}
public:
//---------------------------------------------------------------------
HRESULT create()
{
return CoCreateInstance(P_CLSID, NULL, CLSCTX_ALL, P_IID, (void**)&m_pInterface);
}
//---------------------------------------------------------------------
operator T_INTERFACE*() const
{
return m_pInterface;
}
//---------------------------------------------------------------------
T_INTERFACE& operator*() const
{
return *m_pInterface;
}
//---------------------------------------------------------------------
T_INTERFACE** operator&()
{
return &m_pInterface;
}
//---------------------------------------------------------------------
T_INTERFACE* operator->() const
{
return m_pInterface;
}
//---------------------------------------------------------------------
T_INTERFACE* operator=(T_INTERFACE* pInterface)
{
if ( equals(pInterface) )
return m_pInterface;
m_pInterface->Release();
m_pInterface = pInterface;
if (m_pInterface)
m_pInterface->AddRef();
return m_pInterface;
}
//---------------------------------------------------------------------
T_INTERFACE* operator=(IUnknown* pIUnknown)
{
if (pIUnknown)
pIUnknown->QueryInterface(P_IID, (void**)&m_pInterface);
return m_pInterface;
}
//---------------------------------------------------------------------
T_INTERFACE* operator=(const ComPtr< T_INTERFACE, P_IID, P_CLSID >& aCopy)
{
m_pInterface = aCopy.m_pInterface;
if (m_pInterface)
m_pInterface->AddRef();
return m_pInterface;
}
//---------------------------------------------------------------------
T_INTERFACE* get() const
{
return m_pInterface;
}
//---------------------------------------------------------------------
void attach(T_INTERFACE* pInterface)
{
if (pInterface)
{
m_pInterface->Release();
m_pInterface = pInterface;
}
}
//---------------------------------------------------------------------
T_INTERFACE* detach()
{
T_INTERFACE* pInterface = m_pInterface;
m_pInterface = NULL;
return pInterface;
}
//---------------------------------------------------------------------
void release()
{
if (m_pInterface)
{
m_pInterface->Release();
m_pInterface = NULL;
}
}
//---------------------------------------------------------------------
template< class T_QUERYINTERFACE >
HRESULT query(T_QUERYINTERFACE** pQuery)
{
return m_pInterface->QueryInterface(__uuidof(T_QUERYINTERFACE), (void**)pQuery);
}
//---------------------------------------------------------------------
HRESULT query(REFIID rIID ,
void** pQuery)
{
return m_pInterface->QueryInterface(rIID, pQuery);
}
//---------------------------------------------------------------------
HRESULT unknown(IUnknown** pQuery)
{
return m_pInterface->QueryInterface(IID_IUnknown, (void**)pQuery);
}
//---------------------------------------------------------------------
::sal_Bool equals(IUnknown* pCheck)
{
if (
( ! m_pInterface ) &&
( ! pCheck )
)
return sal_True;
IUnknown* pCurrent = NULL;
m_pInterface->QueryInterface(IID_IUnknown, (void**)&pCurrent);
::sal_Bool bEquals = (pCheck == pCurrent);
pCurrent->Release();
return bEquals;
}
//---------------------------------------------------------------------
::sal_Bool is()
{
return (m_pInterface != 0);
}
private:
T_INTERFACE* m_pInterface;
};
#endif
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