/*

* Copyright (c) 2006 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:  Implementation of transaction handler

*

*/

#ifndef CMTRANSACTION_HANDLER_H

#define CMTRANSACTION_HANDLER_H

#include <commsdattypesv1_1.h>

/**

 *  Transaction handler.

 *

 *  @lib cmmanager.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( CCmTransactionHandler ) : public CBase

    {

    public:

        /** Epoc constructor */

        static CCmTransactionHandler* NewL( CommsDat::CMDBSession& aDb );

        // destructor is intentionally not virtual.

        ~CCmTransactionHandler();

    public:

        /**

        * @return commsdat session

        */

        CommsDat::CMDBSession& Session()const{ return iDb; };

        /**

        * - Checks if transaction is already opened

        * - Set iOwnTransaction is not and opens it and

        *   put 'this' on cleanup&close stack

        */

        void OpenTransactionLC( TBool aSetAttribs = ETrue );

        /**

        * - Checks if the transaction is ours.

        * - If yes, commits the transaction.

        * - anyway does nothing

        * @praram aError - error id

        */

        void CommitTransactionL( TInt aError = KErrNone );

        /**

        * Performs RollbackTransactionL().

        */

        void Close();     

    private:

        /** Constructor. */

        CCmTransactionHandler( CommsDat::CMDBSession& aDb );

        /**

        * Second phase constructor. Leaves on failure.

        */      

        void ConstructL();

    private: // data

        CommsDat::CMDBSession&    iDb;   ///< Not owned CommsDat session pointer

        TUint32         iRefCount;

        TUint32         iProtectionFlag;

    };

#endif // CMTRANSACTION_HANDLER