/*

* Copyright (c) 2006-2007 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:  Task for making MDS querys

*

*/

#ifndef THUMBNAILMDSQUERYTASK_H

#define THUMBNAILMDSQUERYTASK_H

#include <mdesession.h>

#include <mdccommon.h>

#include <mdeobjectquery.h>

#include "thumbnailtask.h"

class CThumbnailServer;

/**

 *  Task for making MDS querys

 *

 *  @since S60 v5.0

 */

class CThumbnailMDSQueryTask: public CThumbnailTask,

                              public MMdEQueryObserver

    {

public:

    /**

     * C++ default constructor

     *

     * @since S60 v5.0

     * @param aProcessor Processor object for running tasks.

     * @param aPriority Priority of the request.

     * @return New CThumbnailMDSQueryTask object.

     */

    CThumbnailMDSQueryTask( CThumbnailTaskProcessor& aProcessor, TInt aPriority,

                            CMdESession* aMdESession, CThumbnailServer& aServer);

    /**

     * Destructor.

     *

     * @since S60 v5.0

     */

    virtual ~CThumbnailMDSQueryTask();    

    /**

     * StartL

     *

     * @since S60 v5.0

     */

    void StartL();

    /**

     * Handles an active object's request completion event.

     *

     * @since S60 v5.0

     */

    void RunL();

    /**

     * Implements cancellation of an outstanding request.

     *

     * @since S60 v5.0

     */

    void DoCancel();

    /**

     * Query path by id

     *

     * @since S60 v5.0

     * @param aId ID

     */

    void QueryPathByIdL(TThumbnailId aId);

    /**

     * Query Id by path

     *

     * @since S60 v5.0

     * @param aUri the Path

     */

    void QueryIdByPathL(const TDesC& aUri);

    /**

     * Sets are values updated to db automatically

     *

     * @since S60 v5.0

     * @param aComplete message, default is ETrue

     */

    void SetUpdateToDb(const TBool& aUpdateToDb );

public:

    // From MMdEQueryObserver

    void HandleQueryNewResults( CMdEQuery& aQuery, TInt aFirstNewItemIndex, TInt aNewItemCount );

    void HandleQueryCompleted( CMdEQuery& aQuery, TInt aError );    

protected:

    void ReturnPath(const TDesC& aUri);

private:

    // not own

    CMdESession* iMdESession;

    // own

    CMdEObjectQuery* iQuery;

    TThumbnailRequestParamsPckgBuf iRequestParams;

    /**

     * Server.

     */

    CThumbnailServer& iServer;

     /**

     * Query type used when filling missing information from MDS

     */

     TMDSQueryType iQueryType;

     /**

     * Does task update db

     */

     TBool iUpdateToDb;

     TFileName iUri;

};

#endif // THUMBNAILMDSQUERYTASK_H