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// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#ifndef EXTENSIONCONTAINER_H_
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#define EXTENSIONCONTAINER_H_
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class CExtensionContainer:public CBase
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{
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public:
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/** Get Extension Interface.
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* Implemented using the CBase::Extension_() mechanism
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* Note that the pointer returned is only good for the lifetime of the called CBase derived object.
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* @param aExtensionId The GUID/ Well-known ID of the interface
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* @return pointer to the interface or NULL if not available
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**/
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inline TAny* GetInterface(TUint aExtensionId);
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/** Get Extension Interface - templated helper.
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* Resolves the ID and returned pointer based on the class name.
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* Note that the pointer returned is only good for the lifetime of the called CBase derived object.
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* Class name should support ETypeId intergral value, else use non-template version.
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* @param MClass The class of the interface with embedded GUID / Well known ID
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* @return pointer to the interface or NULL if not available
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**/
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template <class MClass> MClass* GetInterface()
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{
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return static_cast<MClass*>(GetInterface(MClass::ETypeId));
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}
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};
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inline TAny* CExtensionContainer::GetInterface(TUint aExtensionId)
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{
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TAny* retVal=NULL;
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//Note that extension is intentionally not overloaded in CExtensionContainer
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if (this->Extension_(aExtensionId,retVal,NULL)<KErrNone)
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{
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return NULL;
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}
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else
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{
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return retVal;
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}
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}
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#endif /* EXTENSIONCONTAINER_H_ */
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