// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of "Eclipse Public License v1.0"

 // which accompanies this distribution, and is available

 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

 //

 // Initial Contributors:

 // Nokia Corporation - initial contribution.

 //

 // Contributors:

 //

 // Description:

 //

 #ifndef EXTENSIONCONTAINER_H_

 #define EXTENSIONCONTAINER_H_

 class CExtensionContainer:public CBase

     {

 public:

     /** Get Extension Interface.

      *  Implemented using the CBase::Extension_() mechanism 

      *  Note that the pointer returned is only good for the lifetime of the called CBase derived object.

      *  @param  aExtensionId    The GUID/ Well-known ID of the interface

      *  @return pointer to the interface or NULL if not available

      **/

         inline TAny* GetInterface(TUint aExtensionId);

     /** Get Extension Interface - templated helper.

      *  Resolves the ID and returned pointer based on the class name.

      *  Note that the pointer returned is only good for the lifetime of the called CBase derived object.

      *  Class name should support ETypeId intergral value, else use non-template version. 

      *  @param  MClass  The class of the interface with embedded GUID / Well known ID 

      *  @return pointer to the interface or NULL if not available

      **/

         template <class MClass> MClass* GetInterface()

         {

             return static_cast<MClass*>(GetInterface(MClass::ETypeId));

         }

     };

 inline TAny* CExtensionContainer::GetInterface(TUint aExtensionId)

     {

     TAny*   retVal=NULL;

     //Note that extension is intentionally not overloaded in CExtensionContainer

     if (this->Extension_(aExtensionId,retVal,NULL)<KErrNone)

         {

         return NULL;

         }

     else

         {

         return retVal;

         }

     }

 #endif /* EXTENSIONCONTAINER_H_ */