/*

* Copyright (c) 2007 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: Operation for reading partial landmarks.

*

*

*/

#ifndef EPOS_CPOSLMLOCALGETSORTEDIDSOP_H_

#define EPOS_CPOSLMLOCALGETSORTEDIDSOP_H_

#include "EPos_CPosLmLocalOperation.h"

#include <EPos_Landmarks.h>

class CPosLandmark;

class CPosLmLocalDatabase;

class CPosLmPartialReadParameters;

/**

* Operation for reading partial landmarks. This operation can be

* either synchronous or asynchronous.

*/

NONSHARABLE_CLASS(CPosLmLocalGetSortedIdsOp) : public CPosLmLocalOperation

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * @param aDb A landmark database.

        * @param aSortPref Sorting preference

        */

        static CPosLmLocalGetSortedIdsOp* NewL(

            CPosLmLocalDatabase& aDb,

            TPosLmSortPref aSortPref );

        virtual ~CPosLmLocalGetSortedIdsOp();

    public: // From CPosLmLocalOperation

        /** Synchronous incremental execution of the operation. Performs a single

        * step of the operation synchronously.

        *

        * Leaves with an error code if something goes wrong.

        *

        * @param[out] aProgress Will be set to the progress of the operation when

        * the step has finished.

        * @return @p KPosLmOperationNotComplete if the step has completed but

        *   more steps are needed before the operation has finished,

        *   @p KErrNone if the operation has finished successfully.

        */

        TInt NextStepL( TReal32& aProgress );

        /** Handles any error generated by NextStepL. Will be called when

        * NextStepL leaves. The error code is allowed to be changed, if

        * necessary.

        *

        * @param[in,out] aError An error code generated by NextStepL.

        */

        void HandleError( TInt& aError );

    public:     // New functions

        /** Fills given array with landmark IDs. */

        void GetResultL( RArray<TPosLmItemId>& aIdArray );

    private:

        /**

        * C++ default constructor.

        * @param aDb A landmark db.

        */

        CPosLmLocalGetSortedIdsOp( CPosLmLocalDatabase& aDb, TPosLmSortPref aSortPref );

        void ConstructL();

        void ReadInfoFromResourceFileL();

        // Prohibit copy constructor if not deriving from CBase.

        CPosLmLocalGetSortedIdsOp(

            const CPosLmLocalGetSortedIdsOp&);

        // Prohibit assigment operator if not deriving from CBase.

        CPosLmLocalGetSortedIdsOp& operator=(

            const CPosLmLocalGetSortedIdsOp&);

    private:    // Data

        TPosLmSortPref iSortPref;

        CArrayFixSeg<TPosLmItemId>* iIdArray;

        TInt iStatusFlag;

        TInt iCurrent;

        TInt iIdBatchSize;

    };

#endif /*EPOS_CPOSLMLOCALGETSORTEDIDSOP_H_*/