1 /*

     2 * Copyright (c) 2009 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:  HsService base 

    15 *

    16 */

    17 

    18 

    19 #ifndef SERVICEBASE_H

    20 #define SERVICEBASE_H

    21 

    22 struct HsServiceInterfaceId;

    23 

    24 /** @ingroup group_hsservicemodel group_service_api_candidates

    25  *  The base class for service interfaces

    26  *

    27  *  @lib 

    28  *  @since S60 ?S60_version

    29  */

    30 class IHsServiceBase

    31     {

    32     

    33 public:

    34     /**

    35      * Default virtual destructor.

    36      */

    37     virtual ~IHsServiceBase() {}

    38 

    39     /**

    40      * Interface getter with casting.

    41      *

    42      * @since S60 ?S60_version

    43      * @param aBase HsService base object.

    44      * @return The queried interface, or NULL if the interface is not

    45      *         supported or available.

    46      */

    47     template <class T>

    48     static T* MakeInterface(IHsServiceBase* aBase)

    49         {

    50         return (aBase? static_cast<T*>(aBase->resolveService(T::type())): 0);    

    51         }

    52         

    53     

    54     /**

    55      * Interface getter.

    56      * Derived classes should always call the base class method

    57      * from the overridden MakeInterface.

    58      *

    59      * @since S60 ?S60_version

    60      * @param aType The type id of the queried interface.

    61      * @return The queried interface, or NULL if the interface is not

    62      *         supported or available.

    63      */

    64     virtual IHsServiceBase* resolveService( const HsServiceInterfaceId &aType ) = 0;

    65     

    66     

    67     };

    68 

    69 #endif