/*

* Copyright (c) 2005-2009 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:  A singleton that provides system unique ID's*

*/

#ifndef __MDSINDEXER_H__

#define __MDSINDEXER_H__

// INCLUDE FILES

#include <e32base.h>

#include <e32cmn.h>

#include "mdccommon.h"

// FORWARD DECLARATIONS

class RRowData;

// CLASS DECLARATION

/**

* A static class that is used to provide system unique

* ID's for database storage purposes. 

*/

class MMdSIndexer

    {

    public: // Public functions

    	/**

    	 * Gets last object id from DB

    	 * MUST be called once, when connection to DB is established

    	 */

    	static TItemId StartIndexL();

    	/**

	     * Provides a new system unique ID

	     * @return a new system-wide unique ID

	     */

	    static TItemId GetIndex( );

	    /**

	     * Reverts system ID to previous state

	     * used when add item failed

	     */

	    static void RevertIndex( );

	    /**

	     * Executes a SQL clause and returns the ID of the last object in DB.

	     * @param aSqlClause SQL clause to execute

	     * @param aRowData query parameters

	     * @return result of last_insert_rowid()

	     */

	    static TItemId ExecuteAndGetIndexL(const TDesC &aSqlClause, const RRowData &aRowData );	    	

	private:

		static TItemId GetIndexL();

		static void GetLastItemIdL();

		static TItemId iId;

	};

class RSQLIndex

	{

	public:

		RSQLIndex();

		const TItemId& GetId() const;

		void Commit();

		void Close();

	private:

		const TItemId iId;

		TBool iCommit;

	};

#endif // __MDSINDEXER_H__