/*

* Copyright (c) 2006-2009 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:  MetadataEngine query adapter for CLF

*

*/

#ifndef C_CCLFQUERYADAPTER_H

#define C_CCLFQUERYADAPTER_H

// INCLUDES

#include <e32base.h>

#include <CLFContentListing.hrh>

#include <CLFContentListing.h>

#include <bamdesca.h>

#include <mdesession.h>

#include <mdeobjectquery.h>

// FORWARD DECLARATIONS

class CMdEObject;

class CMdEProperty;

class CMdEPropertyDefSet;

/**

 *  Wraps MdE functionality for Content Listing Framework

 *

 *  @lib clf2mde

 *  @since S60 3.1

 */

NONSHARABLE_CLASS( CCLFQueryAdapter ) : public CBase, 

                                        public MMdEQueryObserver

    {

    public: // Constructors and destructor

        // 2-phase constructor

        static CCLFQueryAdapter* NewL( CMdESession& aMdESession );

        // Destructor

        virtual ~CCLFQueryAdapter();

    public: // New functions

        /**

         * Queries the mediatypes

         *

         * @since S60 3.1

         * @param aMimeTypeArray array for mime types which are included in result

         * @param aMediaTypeArray array for media types which are included in result

         * @param aStatus reference to TRequestStatus which is completed

         */

        void QueryMdEObjectsL( const MDesCArray& aMimeTypeArray,

                               const TArray< TInt >& aMediaTypeArray,

                               CMdEObjectQuery*& aQuery,

                               TRequestStatus& aStatus );

        void QueryMdEObjectsL( const TArray< TCLFItemId >& aItemIDArray,

                               const TDesC& aObjDefStr,

                               CMdEObjectQuery*& aQuery,

                               TRequestStatus& aStatus );

    protected: // Functions from base classes

        /**

         * From MMdEQueryObserver

         */

        void HandleQueryNewResults( CMdEQuery& aQuery,

                                    TInt aFirstNewItemIndex,

                                    TInt aNewItemCount );

        /**

         * From MMdEQueryObserver

         */

        void HandleQueryCompleted( CMdEQuery& aQuery, TInt aError );

    private: // New functions

        /**

        * Helper function.

        */

        void CompleteRequest( CMdEQuery& aQuery, TInt aError );

        void AddMimeTypeConditionL( CMdELogicCondition& aLogicCondition,

                                    const CMdEPropertyDef& aPropDef,

                                    const TPtrC& aMimeType );

    private:

        /**

        * C++ default constructor.

        */

        CCLFQueryAdapter( CMdESession& aMdESession );

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

    private: // data

        /** MdE session. Ref */

    	CMdESession& iMdESession;

        /** MdE namespace */

        CMdENamespaceDef* iDefaultNamespaceDef;

        /** MdE query array */

        RPointerArray< CMdEQuery > iQueryArray;

        /** Request status array */

        RPointerArray< TRequestStatus > iStatusArray;

    };

#endif // C_CCLFQUERYADAPTER_H

//  End of File