// System includes

// User includes

// Forward declarations

 * @ingroup group_wrtdataplugin

 *

 * Wrt data observer

 * @since S60 5.2

NONSHARABLE_CLASS( CWrtDataObserver ) : public CBase, 

    public MLiwNotifyCallback

public:

    // constructor and destructor

    /**

    * Part of the two phased constuction

    *

    * @param aInterface reference of the interface 

    * @param aData reference of the wrt data object

    * @return none

    */

    static CWrtDataObserver* NewL( MLiwInterface* aInterface, CWrtData* aData );

    /**

    * Destructor

    *

    * @param none

    * @return none

    */   

    ~CWrtDataObserver();

private:

    // constructors

    /**

    * Constructor

    *

    * @param none

    * @return none

    */

    CWrtDataObserver();

    /**

    * Part of the two phased construction

    *

    * @param aInterface reference of the interface

    * @param aData reference of the wrt data object

    * @return void

    */

    void ConstructL( MLiwInterface* aInterface, CWrtData* aData );

public:  

    //from MLiwNotifyCallbackc

    /**

    * Handles notifications caused by an asynchronous Execute*CmdL call

    * or an event.

    *

    * @param aCmdId The service command associated to the event.

    * @param aEventId occurred event, see LiwCommon.hrh.

    * @param aEventParamList Event parameters, if any, as defined per

    *        each event.

    * @param aInParamList Input parameters, if any, given in the

    *        related HandleCommmandL.

    * @return Error code for the call back.

    */

    virtual TInt HandleNotifyL(

        TInt aCmdId,

        TInt /*aEventId*/,

        CLiwGenericParamList& aEventParamList,

        const CLiwGenericParamList& /*aInParamList*/);

public:

    // new functions

    /**

    * Registers to CPS for add, delete , update and execute notifications

    * @aFilter - filter for input parameter list

    * @return void.

    */

    void RegisterL( CLiwDefaultMap* aFilter );

    /**

    * Cancel all the registered notifications. 

    * @return void.

    */

    void ReleaseL();

private:

    // data 

    /** Interface Reference, not owned */     

    MLiwInterface* iInterface;    

    // Reference of the wrt data, not owned */    

    CWrtData* iData;    

    /** Call back error code */

    TInt iError;        

#endif // WRTDATAOBSERVER_H

// End of file