/*

* Copyright (c) 2005 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:  This file contains the header of the phone engine base 

*                central repository monitor classes 

*

*/

#ifndef CPEPUBSUBMONITOR_H

#define CPEPUBSUBMONITOR_H

// INCLUDE FILES

#include <e32base.h>

#include <e32property.h>

#include <talogger.h>

// Forward declarations

class CRepository;

class MPEPhoneModelInternal;

class RProperty;

// BASE CLASS

// CLASS DECLARATION

/**

*   CPEPubSubMonitor

*   Active object base class for publish&subscribe monitor code - not instantiable

*   Exported methods are used by variant phone engine or other PE components

*   This class should not be used by components external to the TelephonyEngine

*

*  @lib PhoneEngineBase.lib

*  @since Series60_4.0

*/

NONSHARABLE_CLASS( CPEPubSubMonitor ) : public CActive

    {

    protected:

        ~CPEPubSubMonitor();

        CPEPubSubMonitor( MPEPhoneModelInternal& aModel );

        /**

        * Creates a new property object and submits a notification request

        */

        void BaseConstructL( TUid aCategory, TUint aKey, TUint aType );

    protected:

        /**

        * Submits a notification request

        */

        void SubmitNotifyRequestL();

        /**

        * Defines the actions that take place when a change indication

        * is received. Each deriving monitor has to define the implementation for

        * this method. Most common approach would be to save the data to internal

        * data store and send a message via phone model if neccessary.

        */

    	virtual void UpdateL() = 0;

    public:

        /**

        * Gets the current integer value of the monitored key

        * @param TInt& aValue the current value of the monitored setting

        * @return TInt Symbian OS error code from central repository

        */

        virtual TInt Get( TInt& aValue );

        /**

        * Gets the current binary value of the monitored key

        * @param TDes8& aValue the current value of the monitored setting

        * @return TInt Symbian OS error code from central repository

        */

        virtual TInt Get( TDes8& aValue );

        /**

        * Gets the current text value of the monitored key

        * @param TDes16& aValue the current value of the monitored setting

        * @return TInt Symbian OS error code from central repository

        */

        virtual TInt Get( TDes16& aValue );

    protected: // From CActive

        virtual void DoCancel();

        virtual TInt RunError( TInt aError );

        virtual void RunL();

    protected:         

        // Not owned by this object: reference to phone model object    

        MPEPhoneModelInternal& iModel;   

    private:        

        // Owns handle to property object

        RProperty iProperty;

    #ifdef TEF_LOGGING_ENABLED            

        // Category of property

        TUid iCategory;

        // Key of property

        TUint iKey;

    #endif

};

#endif // CPEPUBSUBMONITOR_H