/*

 * Copyright (c) 2002 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: 

 *       Class for registering CPbkContactEngine observers.

 *

 */

 #ifndef __CPbkContactChangeNotifier_H__

 #define __CPbkContactChangeNotifier_H__

 //  INCLUDES

 #include <e32base.h>  // CBase

 // FORWARD DECLARATIONS

 class CPbkContactEngine;

 class MPbkContactDbObserver;

 // CLASS DECLARATION

 /**

  * A class used for registering as an observer for contact database

  * change events. 

  */

 class CPbkContactChangeNotifier : public CBase

     {

     public:  // Constructors and destructor

         /**

          * Creates a new instance of this class and registers aObserver as an

          * observer of aEngine.

          *

          * @param aEngine   The observed object.

          * @param aObserver The observer to call when database changes occur.

          * @return  A contact change notifier instance.

          */

         IMPORT_C static CPbkContactChangeNotifier* NewL

             (CPbkContactEngine& aEngine, MPbkContactDbObserver* aObserver);

         /**

          * Removes the aObserver from aEngine given as paramters to NewL and

          * destructs this object.

          */

         ~CPbkContactChangeNotifier();

     private:  // Implementation

         CPbkContactChangeNotifier

             (MPbkContactDbObserver* aObserver);

         void ConstructL(CPbkContactEngine& aEngine);

     private:  // data

         /// Ref: Phonebook engine

         CPbkContactEngine* iEngine;

         /// Ref: the observer

         MPbkContactDbObserver* iObserver;

     };

 #endif // __CPbkContactChangeNotifier_H__

 // End of File