1 /*

     2 * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  A singleton that provides system unique ID's*

    15 */

    16 

    17 #ifndef __MDSINDEXER_H__

    18 #define __MDSINDEXER_H__

    19 

    20 // INCLUDE FILES

    21 #include <e32base.h>

    22 #include <e32cmn.h>

    23 

    24 #include "mdccommon.h"

    25 

    26 // FORWARD DECLARATIONS

    27 class RRowData;

    28 

    29 

    30 // CLASS DECLARATION

    31 /**

    32 * A static class that is used to provide system unique

    33 * ID's for database storage purposes. 

    34 */

    35 class MMdSIndexer

    36     {

    37     public: // Public functions

    38 

    39     	/**

    40     	 * Gets last object id from DB

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

    42     	 */

    43     	static TItemId StartIndexL();

    44 

    45     	/**

    46 	     * Provides a new system unique ID

    47 	     * @return a new system-wide unique ID

    48 	     */

    49 	    static TItemId GetIndex( );

    50 

    51 	    /**

    52 	     * Reverts system ID to previous state

    53 	     * used when add item failed

    54 	     */

    55 	    static void RevertIndex( );

    56 

    57 	    /**

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

    59 	     * @param aSqlClause SQL clause to execute

    60 	     * @param aRowData query parameters

    61 	     * @return result of last_insert_rowid()

    62 	     */

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

    64 

    65 	private:

    66 		static TItemId GetIndexL();

    67 

    68 		static void GetLastItemIdL();

    69 

    70 		static TItemId iId;

    71 	};

    72 

    73 class RSQLIndex

    74 	{

    75 	public:

    76 		RSQLIndex();

    77 

    78 		const TItemId& GetId() const;

    79 

    80 		void Commit();

    81 

    82 		void Close();

    83 

    84 	private:

    85 		const TItemId iId;

    86 		TBool iCommit;

    87 	};

    88 

    89 #endif // __MDSINDEXER_H__