/*

* Copyright (c) 2005-2007 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:  Plug-in main class

*

*/

#ifndef WRTDATAOBSERVER_H

#define WRTDATAOBSERVER_H

// INCLUDE FILES

#include <LiwCommon.h>

class CWrtData;

/**

 *  @ingroup group_wrtdataplugin

 *

 *  Wrt data observer

 *

 *  @since S60 v3.2

 */

class CWrtDataObserver : public CBase, public MLiwNotifyCallback

    {

public:

    /**

    * 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 :

    /**

    * 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:

    /**

    * 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:

    // Reference of 

    // Not owned

    MLiwInterface* iInterface;

    // Reference of the wrt data

    // Not owned

    CWrtData* iData;

    // Call back error code

    TInt iError;

    };

#endif /*WRTDATAOBSERVER_H*/