/*

* 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 base class

*

*/

#include    "transaction.h"

#include    "transactionelement.h"

#include    "transactionfactory.h"

#include    "xmluicontrollerpanic.h"

// ============================ MEMBER FUNCTIONS ===============================

using namespace AiXmlUiController;

CTransaction::CTransaction()

    : iTransactionElements(CTransactionElement::LinkOffset())

    {

    }

CTransaction* CTransaction::NewL()

    {

    CTransaction* self = new( ELeave ) CTransaction;

    return self;

    }

CTransaction::~CTransaction()

    {

    __ASSERT_DEBUG( iTransactionElements.IsEmpty(), Panic( ETransactionElementListNotEmpty ) );

    }

TInt CTransaction::Id() const

    {

    return iTxId;

    }

void CTransaction::Initialize(TInt aTxId)

    {

    iTxId = aTxId;

    }

void CTransaction::Append(MTransactionElement& aElement )

    {

    iTransactionElements.AddLast(dynamic_cast<CTransactionElement&>(aElement));

    }

void CTransaction::CommitL( TBool& aLayoutChanged, RPropertyHashMap& aPropertyHashMap )

    {

    aLayoutChanged = EFalse;

    if ( iTransactionElements.IsEmpty() )

        {

        // Nothing to do

        return;

        }

    // Initialize iterator

    TDblQueIter<CTransactionElement> iter( iTransactionElements );

    iter.SetToFirst();

    // Commit transaction elements    

    while ( iter )

        {

        // Commit element and advance iterator 

        (iter++)->CommitL( aLayoutChanged, aPropertyHashMap );

        }

    }

void CTransaction::Reset(MTransactionFactory& aFactory)

    {

    Deque();

    iTxId = 0;

    TDblQueIter<CTransactionElement> iter( iTransactionElements );

    iter.SetToFirst();

    while ( iter )

        {

        CTransactionElement* element = iter++;

        aFactory.ReleaseTransactionElement( element );

        }

    __ASSERT_DEBUG( iTransactionElements.IsEmpty(), Panic( ETransactionElementListNotEmpty ) );

    }

TDblQueIter<CTransactionElement> CTransaction::ElementIter()

    {

    TDblQueIter<CTransactionElement> iter( iTransactionElements );

    iter.SetToFirst();

    return iter;

    }

void CTransaction::Deque()

    {

    iLink.Deque();

    }

//  End of File