/**

* Copyright (c) 2005-2009 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:

*

*/

/**

 @file SHIMDATATRANSFER.H

 @internalComponent

*/

#if !defined(__SHIMDATATRANSFER_H__)

#define __SHIMDATATRANSFER_H__

#include <e32def.h>

#include <e32base.h>

#include "ss_datatransfer.h"

class CConnectionProvdBase;

class CNifManSubConnectionShim;

class CConnDataTransferShim : public CConnDataTransfer

	{

public:

	CConnDataTransferShim(CNifManSubConnectionShim& aSubConnectionProviderShim);

	~CConnDataTransferShim();

public:

	//up-calls from the CNifManSubConnectionShim

	TInt NotifyDataTransferred(TUint aUplinkVolume, TUint aDownlinkVolume);

	TInt NotifyDataSent(TUint aUplinkVolume);

	TInt NotifyDataReceived(TUint aDownlinkVolume);

protected:

	//down-calls clients requests

	virtual TInt DoDataTransferred(TUint& aUplinkVolume, TUint& aDownlinkVolume);

	virtual TInt DoDataTransferredCancel();

	virtual TInt DoDataSentNotificationRequest(TUint aRequestedGranularity, TUint aRequestedNotificationVolume);

	virtual TInt DoDataSentNotificationCancel();

	virtual TInt DoDataReceivedNotificationRequest(TUint aRequestedGranularity, TUint aRequestedNotificationVolume);

	virtual TInt DoDataReceivedNotificationCancel();

protected:

	TInt CalculateNewUplinkGranularity(TUint aRequestedGranularity);

	TInt CalculateNewDownlinkGranularity(TUint aRequestedGranularity);

	TInt SetNextUplinkGranularity();

	TInt SetNextDownlinkGranularity();

	TInt SetUplinkGranularity(TUint aRequestedGranularity);

	TInt SetDownlinkGranularity(TUint aRequestedGranularity);

protected:

	static TInt CalculateNewGranularity(TInt aRequestedGranularity, TUint aCurrentGranularity, RArray<TUint>& aGranularities, TUint& aNewGranularity);

private:

	CNifManSubConnectionShim& iSubConnectionProviderShim;

	RArray<TUint> iUplinkGranularities;		// ordered lists of deltas for the granularities

	RArray<TUint> iDownlinkGranularities;

	TUint iCurrentUplinkGranularity;		// the aggregate notification granularity calculated from all the CConnection requests

	TUint iCurrentDownlinkGranularity;

	};

#endif	// __SHIMDATATRANSFER_H__