// Copyright (c) 2004-2009 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:

//

#ifndef __DATAPROVIDER_H__

#define __DATAPROVIDER_H__

#include <tzdefines.h> // ttztimereference

#include "tzswiobserver.h"

const TInt KDataProviderType = 0;

class CReadOnlyTzDb;

class CTzRules;

class RFs;

class CTzUserDataDb;

class CTzDataProvider : public CBase

	{

public:

	static CTzDataProvider* NewL(RFs& aFs, CTzSwiObserver& aSwiObserver, 

		CTzUserDataDb& aUserDataTzDb, MTzDataObserver& aTzDataObserver);

	~CTzDataProvider();

public: 

	CTzId* GetDefaultTimeZoneIdL() const;

	void GetTzRulesL(CTzRules& aTzRules, CTzId& aTzId) const;

	void ReleaseTzRules();

	void GetOffsetsForTimeZoneIdsL(CBufFlat& aTimeZoneIdArray) const;

	TBool IsIdInDbL(TUint aTzId);

	void BackupBeginningL();

	void BackupCompletedL();

	void RestoreBeginningL();

	void RestoreCompletedL();

private:

	CTzDataProvider(RFs& aFs, CTzUserDataDb& aUserDataTzDb, MTzDataObserver& aTzDataObserver);

	void ConstructL(CTzSwiObserver& aSwiObserver);

private:

	CReadOnlyTzDb* iReadOnlyTzDb;

	RFs& iFs;

	MTzDataObserver& iTzDataObserver;

	CTzUserDataDb& iUserDataTzDb;

	};	

#endif // __DATAPROVIDER_H__