/*

* Copyright (c) 2008 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:  message change observer

*

*/

#ifndef __MIMCACHECLIENT_H

#define __MIMCACHECLIENT_H

#include <e32std.h>

#include <imcachedefs.h>

/**

 * An interface through which client gets information

 * about available  data updates.

 *

 * @since

 */

class MIMCacheClient

    {

    public:

		/**

    	* Registeres the cache update observer to server

    	* @param aStatus status message to regisetr

		* @param aRight, operations

    	*/

        virtual void RegisterObserverToServerL( TRequestStatus& aStatus, EIMCacheOperations aRight ) = 0;

        /**

    	* unRegisteres the cache update  observer to server

    	* @param aStatus status message to regisetr

		* @param aRight, operations

    	*/

        virtual void UnRegisterObserverToServerL( TRequestStatus& aStatus, EIMCacheOperations aRight ) = 0 ;

        /**

        * Gets called when data update is available.

        * Client can then decide wether to use the old one

        * @param aRight, operations

        * @param abuuferptr 

        */

        virtual TPtr8 GetBufferedDataL(EIMCacheOperations aOperationType ) = 0 ;

        /**

         * cancels any outstanding requests pending from the server

         * @param aStatus status message to regisetr

         * @param aRight,right is operations

         */

        virtual void CancelRequestL( TRequestStatus& aStatus, EIMCacheOperations aRight) = 0;

protected:

    	/**

    	* Destructor

    	*/

    	virtual ~MIMCacheClient() {};

    };

#endif //__MIMCACHECLIENT_H