1 /*

     2 * Copyright (c)  Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  ESMRUI API extension definition

    15 *

    16 */

    17 

    18 #ifndef ESMRUTILSAPIEXT_H

    19 #define ESMRUTILSAPIEXT_H

    20 

    21 #include <CMRUtils.h>

    22 

    23 /**

    24  * Extension API query function.

    25  *

    26  * Usage:

    27  *  Class providing extension:

    28  *

    29  *  class CExtendable

    30  *      {

    31  *      public:

    32  *      .

    33  *      .

    34  *      .

    35  *      TAny* ExtensionL( TUid aExtUid );

    36  *      }; 

    37  *

    38  *   TAny* CExtendable::ExtensionL( TUid aExtUid )

    39  *      {

    40  *      if (aExtUid == KOwnExtension)

    41  *          {

    42  *          return static_cast<ExtensionApiType*>( this );

    43  *          }

    44  *      } 

    45  *

    46  *  Class using extension:

    47  *

    48  *

    49  *  CMRUtils* utils = ...;

    50  *  ExtensionApiType* ext = ExtensionApiL<ExtensionApiType>( iUtils );

    51  *

    52  * @param aUtils

    53  * @return Pointer to the requested extension API

    54  */

    55 template<class ExtensionApiType>

    56 ExtensionApiType* ExtensionApiL( CMRUtils& aUtils )

    57     {

    58     TAny* extApi = aUtils.ExtensionL( ExtensionApiType::ExtensionUid() );

    59     if ( extApi )

    60         {

    61         return static_cast<ExtensionApiType*>( extApi );

    62         }

    63     else

    64         {

    65         return NULL;        

    66         }

    67     }

    68     

    69 #endif  // ESMRUTILSAPIEXT_H

    70 

    71 // End of File