/*

* Copyright (c) 2008-2009 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:  Listens for changes in one CommsDat table through CenRep.

*

*/

#ifndef CMCOMMSDATNOTIFIER_H

#define CMCOMMSDATNOTIFIER_H

_LIT( KIapDisappear, "Iap disappears from CommsDat" );

_LIT( KDestDisappear, "Destination disappears from CommsDat" );

class CCmManagerImpl;

class CRepository;

class MCmCommsDatWatcher;

// A stack to store watchers

typedef CArrayPtrFlat<MCmCommsDatWatcher> CCmCallBackArray;

// Used to notify parent view what happens during son's view editing.

const TInt KCmNotifiedNone = 0;

const TInt KCmNotifiedDestinationDisappear = 1;

const TInt KCmNotifiedIapIsNotInThisDestination = 2;

const TInt KCmNotifiedIapDisappear = 3;

class MCmCommsDatWatcher

    {

public:

    // watcher should implement this function to get the notification of CommsDat changes.

    // see class CCmManagerImpl for watcher registration

    virtual void CommsDatChangesL() = 0;

    };

// Used for son's watcher to notify parent watcher that CommsDat has changes

// if farther watcher wants to know what heppens when son's watcher exiting

class CCmParentViewNotifier

    {

public:

    virtual void NotifyParentView( TInt aValue ) = 0;

    };

/*

 * CommsDat can suddenly change with some reasons, e.g., an application may suddenly add/delete a destination

 * and Iap. Those changes may affect CmManager. This class will listen to changes in one CommsDat table

 * through CenRep and inform related watcher that is interesting in CommsDat changes.

 */

NONSHARABLE_CLASS( CCmCommsDatNotifier ) : public CActive

    {

public:

    static CCmCommsDatNotifier* NewL( TUint32 aTableId );

    static CCmCommsDatNotifier* NewLC( TUint32 aTableId );

    virtual ~CCmCommsDatNotifier();

    void WatcherRegisterL( MCmCommsDatWatcher* aWatcher );

    void WatcherUnRegister( );

private:

    CCmCommsDatNotifier( TUint32 aTableId );

    void ConstructL();

    TInt RequestNotifications();

    void DeleteCallBackArray();

private: // Methods from base class

    void DoCancel();

    void RunL();

private:

    TUint32 iTableId;

    CRepository* iRepository;

    MCmCommsDatWatcher* iWatcher; // callback object that wants to see changes in CommsDat

    CCmCallBackArray* iCallBackArray; // used as stack to go to the next view

    };

#endif // CMCOMMSDATNOTIFIER_H

// End-of-file