// Copyright (c) 1997-2009 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 __AGSINSTANCEITERATOR_H__

#define __AGSINSTANCEITERATOR_H__

#include <e32std.h>

#include <e32base.h>

#include <calentry.h>

class TFindInstanceParams;

class TAgnInstanceId;

class CAgsInstanceSorter;

class CAgnEntryModel;

class CAgnSortCriteria;

class CAgsInstanceSorter;

class CAgnServFileMgr;

class TAgnSortInstance;

class TAgnInstance;

/**

 *  CAgsInstanceIterator

 * 

 */

class CAgsInstanceIterator : public CBase

	{

public:

	// Constructors and destructor

	~CAgsInstanceIterator();

	static CAgsInstanceIterator* NewLC(TInt aIteratorId, TFindInstanceParams* aFindParams, CAgnSortCriteria* aSortCriteria, const RArray<CCalEntry::TType>& aDefaultTypeOrder, RArray<TInt64>& aFileIds, CAgnServFileMgr& aFileManager);

	void NextInstancesL(RArray<TAgnInstance>& aInstances, TInt aStartIndex);

	void PreviousInstancesL(RArray<TAgnInstance>& aInstances, TInt aLastIndex);

	TInt CountL();

	TInt LocateIndexL(TAgnInstance& aInstanceId);

	inline TInt IteratorId() const;

private:

	CAgsInstanceIterator(TInt aIteratorId, CAgnServFileMgr&	aFileManager);

	void ConstructL(CAgnSortCriteria* aSortCriteria, const RArray<CCalEntry::TType>& aDefaultTypeOrder, TFindInstanceParams* aFindParams, RArray<TInt64>& aFileIds);

	TBool IsCached(TInt aIndex, TBool aPrevious) const;

	CArrayFixSeg<TAgnSortInstance>* FindSortedInstanceLC();

	void AddInstanceL(TAgnSortInstance& aSortInstance, RArray<TAgnInstance>& aInstances);

private:	

	RPointerArray<CAgnEntryModel> iModels;

	TInt iIteratorId;

	TInt iInstanceCount;

	TUint iCachedOffset;

	CAgsInstanceSorter* iSorter;

	TFindInstanceParams* iFindParams;

	RArray<TAgnInstance> iCachedInstances;

	CAgnServFileMgr&	iFileManager;

	};

/**

 *  CAgsInstanceIteratorMgr

 * 

 */

class CAgsInstanceIteratorMgr : public CBase

	{

public:

	// Constructors and destructor

	~CAgsInstanceIteratorMgr();

	static CAgsInstanceIteratorMgr* NewL();

	TInt CreateIteratorL(TFindInstanceParams* aFindParams, CAgnSortCriteria* aSortCriteria, RArray<TInt64>& aFileIds, CAgnServFileMgr& aFileManager);

	void DestroyIteratorL(TInt aIteratorId);

	void NextInstancesL(TInt aIteratorId, RArray<TAgnInstance>& aInstances, TInt aStartIndex);

	void PreviousInstancesL(TInt aIteratorId, RArray<TAgnInstance>& aInstances, TInt aLastIndex);

	TInt CountL(TInt aIteratorId);

	TInt LocateIndexL(TInt aIteratorId, TAgnInstance& aInstanceId);

private:

	CAgsInstanceIteratorMgr();

	void ConstructL();

	TInt FindIteratorById(TInt aIteratorId) const;	

private:

	RPointerArray<CAgsInstanceIterator> iIteratorList;

	RArray<CCalEntry::TType> iDefaultTypeOrder;	

	TInt iNextAvailableId;

	};

inline TInt CAgsInstanceIterator::IteratorId() const

	{

	return iIteratorId;

	}

#endif // __AGSINSTANCEITERATOR_H__