/*

* Copyright (c) 2002-2009 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 CCLFDBITEMPROVIDER_H

#define CCLFDBITEMPROVIDER_H

//  INCLUDES

#include <CLFContentListing.hrh>

#include <CLFContentListing.h>

#include <mdesession.h>

#include <bamdesca.h>

#include <e32base.h>

// FORWARD DECLARATIONS

class MCLFItem;

class MCLFItemProviderObserver;

class CCLFDbItemContainer;

class CCLFContainerItem;

class CCLFQueryAdapter;

// CLASS DECLARATION

/**

*  Helper class to get items from CLF server.

*

*  @lib ContentListingFramework.lib

*  @since Series 60 3.0

*/

NONSHARABLE_CLASS( CCLFDbItemProvider ) : public CActive

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CCLFDbItemProvider* NewL( CCLFDbItemContainer& aDbItemContainer,

                                         CCLFQueryAdapter& aQueryAdapter, CMdESession* iMdESession );

        /**

        * Destructor.

        */

        virtual ~CCLFDbItemProvider();

    public: // New functions

        /**

        * Async function for fething items from server.

        * @since Series 60 3.0

        * @param aMimeTypeArray

        * @param aMediaTypeArray

        * @param aObserver item provider observer

        */

        void PrepareItemsL( const MDesCArray& aMimeTypeArray,

                            const TArray<TInt>& aMediaTypeArray,

                            MCLFItemProviderObserver& aObserver );

        void PrepareItemsL( const TArray<TCLFItemId>& aItemIDArray,

                            MCLFItemProviderObserver& aObserver );

        /**

        * Get items.

        * @since Series 60 3.0

        * @param aItemArray

        * @return system-wide error code

        */

        TInt GetItems( RPointerArray<MCLFItem>& aItemArray );

    protected:  // New functions

        /**

        * From CActive

        */

        void DoRunL();

        /**

        * From CActive

        */

        TInt RunError( TInt aError );

        void DoFetchMdSIdDataCachedL();

        void DoFetchMdSDataL();

        void DoFetchMdSIdDataL( RArray< TCLFItemId >& aItemIDArray );

        void CreateCLFItemL( CCLFContainerItem& aCItem );

    protected:  // Functions from base classes

        /**

        * From CActive

        */

        void DoCancel();

        /**

        * From CActive

        */

        void RunL();

    private:

        /**

        * C++ default constructor.

        */

        CCLFDbItemProvider( CCLFDbItemContainer& aDbItemContainer,

                                   CCLFQueryAdapter& aQueryAdapter, CMdESession* aMdESession );

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

    private:    // Data

        enum TCLFItemProviderState

            {

            EPrepareItemIds = 0x1,

            EPrepareItems,

            EItemsReady

            };

        // Own

        TCLFItemProviderState iProviderState;

        // Ref

        MCLFItemProviderObserver* iObserver;

        // Own

        RPointerArray< MCLFItem > iItemArray;

        // Ref

        CCLFDbItemContainer& iDbItemContainer;

        // Ref

        CCLFQueryAdapter& iQueryAdapter;        

        // Own

        CMdEObjectQuery* iObjectQuery;

        // Ref

        const TDesC* iObjDefStr;

        // Ref

        CMdESession* iMdESession;

    };

#endif      // CCLFDBITEMPROVIDER_H

// End of File