/*

* Copyright (c) 2005-2007 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:  Transaction

*

*/

#ifndef C_TRANSACTION_H

#define C_TRANSACTION_H

#include <e32base.h>

#include <e32cmn.h>

#include <e32hashtab.h>

#include "xnproperty.h"

#include "xnnodeappif.h"

#include "mtransaction.h"

namespace AiXmlUiController

    {

    class MTransactionElement;

    class CTransactionElement;

    class MTransactionFactory;

    }

namespace AiXmlUiController

{

/**

*  @ingroup group_xmluicontroller

* 

*  CTransaction collects the transaction elements of one transaction

*

*  @lib AiXmlUiMain

*/

class CTransaction : public CBase, public MTransaction

    {

public:  // Constructors and destructor

    static CTransaction* NewL();

    virtual ~CTransaction();

// From MTransaction

    void Append(MTransactionElement& aElement);

    void CommitL(TBool& aLayoutChanged, RPropertyHashMap& aPropertyHashMap);

    void Reset(MTransactionFactory& aFactory);

    TDblQueIter<CTransactionElement> ElementIter();

// New functions

    /**

     * Returns the transaction id of this transaction

     */

    TInt Id() const;

    /**

     * Initializes transaction.

     * @param aTxId transaction id.

     */

    void Initialize(TInt aTxId);

    /**

     * Returns the doubly linked list link offset.

     */

    inline static TInt LinkOffset();

    /**

     * Returns the singly linked list link offset

     */

    inline static TInt FactoryLinkOffset();

    /**

     * Deques this transaction from a doubly linked list

     */

    void Deque();

private:

    CTransaction();

private:    // Data

    /**

     * Transaction identifier.

     */

    TInt iTxId;

    /**

     * Doubly linked list of transaction elements.

     */

    TDblQue<CTransactionElement> iTransactionElements;

    /**

     * Doubly linked list link item.

     */

    TDblQueLink iLink;

    /**

     * Singly linked list link item.

     */

    TSglQueLink iFactoryLink;

    };

// Inline implementations

TInt CTransaction::LinkOffset()

    {

    return _FOFF(CTransaction, iLink);

    }

TInt CTransaction::FactoryLinkOffset()

    {

    return _FOFF(CTransaction, iFactoryLink);

    }

} // namespace AiXmlUiController

#endif      // C_TRANSACTION_H 

//  End of File