taskswitcher/server/src/tsserializeddataprovider.cpp
author Jaakko Haukipuro (Nokia-MS/Oulu) <Jaakko.Haukipuro@nokia.com>
Thu, 16 Sep 2010 12:11:40 +0100
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/*
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* Copyright (c) 2009 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:
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*
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*/
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#include <s32mem.h>
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#include "tsserializeddataprovider.h"
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#include "tsmodel.h"
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// -----------------------------------------------------------------------------
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/**
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 * Leaving constructor. 
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 * @param observer - data observer
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 */
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CTsSerializedDataProvider* CTsSerializedDataProvider::NewL(MTsDataObserver &observer)
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{
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    return new (ELeave) CTsSerializedDataProvider(observer);
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}
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// -----------------------------------------------------------------------------
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/**
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 * Constructor
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 * @param observer - data observer
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 */
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CTsSerializedDataProvider::CTsSerializedDataProvider(MTsDataObserver& observer)
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:
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    mObserver(observer)
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{}
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// -----------------------------------------------------------------------------
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/**
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 * Destructor
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 */
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CTsSerializedDataProvider::~CTsSerializedDataProvider()
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{
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    mData.Close();
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}
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// -----------------------------------------------------------------------------
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/**
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 * Interface implementation.
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 * @see MTsDataProvider::Data()
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 */
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const TDesC8& CTsSerializedDataProvider::Data() const
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{
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    return mData;
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}
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// -----------------------------------------------------------------------------
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/**
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 * Interface implementation.
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 * @see MTsModelObserver::dataChanged(MTsModel &)
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 */
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void CTsSerializedDataProvider::dataChanged(MTsModel &model)
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{
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    serializeModel(model);
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}
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// -----------------------------------------------------------------------------
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/**
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 * Interface implementation.
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 * @see MTsModelObserver::dataChanged(TTsModelItem &)
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 */
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void CTsSerializedDataProvider::dataChanged(const TTsModelItem &/*item*/)
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{
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    //No implementation required now. 
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}
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// -----------------------------------------------------------------------------
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/**
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 * Serialize source model into internal data storage
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 * @param src - model
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 */
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void CTsSerializedDataProvider::serializeModel(const MTsModel &src)
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{
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    TRAPD(errNo, serializeModelL(src));
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    if(KErrNone == errNo ) {
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        mObserver.DataChanged();
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    }
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}
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// -----------------------------------------------------------------------------
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/**
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 * Serialize source model into internal data storage. Function can leave.
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 * @param src - source model
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 */
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void CTsSerializedDataProvider::serializeModelL(const MTsModel &src)
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{
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    const TInt KExpandSize = 256;
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    CBufFlat* buf = CBufFlat::NewL(KExpandSize);
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    CleanupStack::PushL(buf);
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    RBufWriteStream stream(*buf); 
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    CleanupClosePushL(stream);
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    serializeModelL(stream, src);
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    CleanupStack::PopAndDestroy(&stream);
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    mData.Close();
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    mData.CreateL(buf->Size());
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    buf->Read(0, mData, buf->Size());
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    CleanupStack::PopAndDestroy(buf);
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}
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// -----------------------------------------------------------------------------
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/**
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 * Serialize source model into destination stream. Function can leave.
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 * @param dst - destination stream
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 * @param src - source model
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 */
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void CTsSerializedDataProvider::serializeModelL(RWriteStream& dst, const MTsModel &src)
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{
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    dst.WriteInt32L(src.count());
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    for (TInt iter(0); iter < src.count(); ++iter) {
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        dst << src.itemL(iter);
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    }
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}