idlehomescreen/xmluicontroller/inc/mtransaction.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 14 Sep 2010 20:58:58 +0300
branchRCL_3
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/*
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* Copyright (c) 2005-2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Transaction base class
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*
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*/
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#ifndef M_TRANSACTION_H
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#define M_TRANSACTION_H
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#include <e32hashtab.h>
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#include "aipolicyelement.h"
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inline TUint32 NodeHash(const TAny* aPtr)
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    {
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    return (TUint32)aPtr;
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    };
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inline TBool NodeRelation(const TAny* aPtr1, const TAny* aPtr2)
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    {
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    return aPtr1 == aPtr2;
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    };
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// Default functions for xnnode type
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TEMPLATE_SPECIALIZATION class RHashTableBase::Defaults<
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                                        CXnNodeAppIf,
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                                        RHashTableBase::EDefaultSpecifier_Normal>
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	{
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public:
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	inline static TGeneralHashFunction32 Hash();
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	inline static TGeneralIdentityRelation Id();
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	};
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inline TGeneralHashFunction32 RHashTableBase::Defaults<
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                                        CXnNodeAppIf,
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                                        RHashTableBase::EDefaultSpecifier_Normal>::Hash()
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	{return (TGeneralHashFunction32)&NodeHash;}
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inline TGeneralIdentityRelation RHashTableBase::Defaults<
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                                        CXnNodeAppIf,
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                                        RHashTableBase::EDefaultSpecifier_Normal>::Id()
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	{return (TGeneralIdentityRelation)&NodeRelation;}
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namespace AiXmlUiController
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{
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class CTransactionElement;
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class MTransactionElement;
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class MTransactionFactory;
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typedef RPointerArray<CXnProperty> RPropertyArray;
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typedef RPtrHashMap<CXnNodeAppIf, RPropertyArray> RPropertyHashMap;
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/**
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 *  MTransaction represents a transaction of publish operations.
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 *
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 *  @lib AiXmlUiMain
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 */
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class MTransaction
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    {
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public:
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    /**
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     * Appends a transaction element in this transaction.
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     *
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     * @param aElement the transaction element
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     */
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    virtual void Append(MTransactionElement& aElement) = 0;
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    /**
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     * Commits this transaction by committing all transaction elements.
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     *
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     * @param [out] aLayoutChanged true if UI layout changes
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     */
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    virtual void CommitL( RAiPolicyElementArray& aPolicyArray, 
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            RPropertyHashMap& aPropertyHashMap ) = 0;
0
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    /**
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     * Resets this transaction for reuse.
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     *
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     * @param aFactory the factory which created this transaction
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     */
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    virtual void Reset(MTransactionFactory& aFactory) = 0;
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    virtual TDblQueIter<CTransactionElement> ElementIter() = 0;
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protected:
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    ~MTransaction() {};
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    };
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} // namespace AiXmlUiController
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#endif // M_UPDATETRANSACTION_H