/*

* Copyright (c) 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:  HsService base 

*

*/

#ifndef SERVICEBASE_H

#define SERVICEBASE_H

struct HsServiceInterfaceId;

/** @ingroup group_hsservicemodel group_service_api_candidates

 *  The base class for service interfaces

 *

 *  @lib 

 *  @since S60 ?S60_version

 */

class IHsServiceBase

    {

public:

    /**

     * Default virtual destructor.

     */

    virtual ~IHsServiceBase() {}

    /**

     * Interface getter with casting.

     *

     * @since S60 ?S60_version

     * @param aBase HsService base object.

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

     *         supported or available.

     */

    template <class T>

    static T* MakeInterface(IHsServiceBase* aBase)

        {

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

        }

    /**

     * Interface getter.

     * Derived classes should always call the base class method

     * from the overridden MakeInterface.

     *

     * @since S60 ?S60_version

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

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

     *         supported or available.

     */

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

    };

#endif