/*

* 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: 

*     Declares the CActiveApDbNotifier class.

*

*/

#ifndef ACTIVE_AP_DB_NOTIFIER_H

#define ACTIVE_AP_DB_NOTIFIER_H

//  INCLUDES

#include <e32base.h>

#include <ApEngineVer.h>

// FORWARD DECLARATIONS

class CActiveApDb;

// CLASS DECLARATION

/**

* Active object encapsulating an access point database notifier.

* Used by CActiveApDb.

*/

class CActiveApDbNotifier : public CActive

    {

    public:     // construct / destruct

        /**

        * Constructor.

        * @param aDb Active access point database to watch for.

        */

        CActiveApDbNotifier( CActiveApDb& aDb );

        /**

        * Destructor.

        */

        virtual ~CActiveApDbNotifier();

    protected:  // from CActive

        /**

        * Invoked when the outstanding request completes.

        */

        void RunL() ;

        /**

        * Implementation of the Cancel protocol;

        * cancel any outstanding request.

        */

        void DoCancel();

    public:     // new methods

        /**

        * Start the notifier. The notification request is automatically

        * renewed until it is cancelled, or the database is closed by

        * all clients (i.e. released by DBMS).

        */

        void Start();

        /**

        * Cancel and close the notifier now.

        */

        void Stop();

    private:

        /**

        * Request database change notification from the Access Point Engine.

        */

        void NotifyChange();

    private:    // data

        CActiveApDb* iActiveDb;     ///< Pointer to the database.

                                    ///< Does not owns it.

    };

#endif

// End of File