ncdengine/provider/client/inc/ncdnodeuserdataproxy.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 27 Apr 2010 16:46:15 +0300
branchRCL_3
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/*
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* Copyright (c) 2006 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:   Contains CNcdNodeUserDataProxy class
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*
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*/
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#ifndef C_NCD_NODE_USER_DATA_PROXY_H
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#define C_NCD_NODE_USER_DATA_PROXY_H
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#include "ncdinterfacebaseproxy.h"
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#include "ncdnodeuserdata.h"
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class CNcdNodeMetadataProxy;
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/**
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 *  This class implements the functionality for the
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 *  MNcdNodeUserData interfaces. The interface is provided for
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 *  API users.
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 *
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 *  @since S60 v3.2
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 */
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class CNcdNodeUserDataProxy : public CNcdInterfaceBaseProxy, 
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                              public MNcdNodeUserData
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    {
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public:
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    /**
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     * @param aSession The session between the client proxy and the
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     * corresponding server object.
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     * @param aHandle The handle which identifies the server object
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     * that this proxy uses.
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     * @param aNodeMetadata Owns and uses the information of this proxy.
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     * The metadata also keeps track of the refence counts of its objects. 
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     * And handles the deletion of these objects when the total reference 
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     * count reaches zero.
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     * @return CNcdNodeUserDataProxy* Pointer to the created object 
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     * of this class.
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     */
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    static CNcdNodeUserDataProxy* NewL(
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        MCatalogsClientServer& aSession,
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        TInt aHandle,
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        CNcdNodeMetadataProxy& aNodeMetadata );
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    /**
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     * @param aSession The session between the client proxy and the
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     * corresponding server object.
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     * @param aHandle The handle which identifies the server object
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     * that this proxy uses.
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     * @param aNodeMetadata Owns and uses the information of this proxy.
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     * The node also keeps track of the refence counts of its objects. 
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     * And handles the deletion of these objects when the total reference 
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     * count reaches zero.
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     * @return CNcdNodeUserDataProxy* Pointer to the created object 
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     * of this class.
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     */
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    static CNcdNodeUserDataProxy* NewLC(
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        MCatalogsClientServer& aSession, 
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        TInt aHandle,
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        CNcdNodeMetadataProxy& aNodeMetadata );
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    /**
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     * Destructor.
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     * The destructor is set public. So, the node that owns the UserData may
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     * delete it directly when the reference count of the node reaches zero
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     * and the destructor of the node is called.
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     */
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    virtual ~CNcdNodeUserDataProxy();
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public: // MNcdNodeUserData
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    /**
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     * @see MNcdNodeUserData::UserDataL
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     */
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    virtual HBufC8* UserDataL() const;
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    /**
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     * @see MNcdNodeUserData::SetUserDataL
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     */
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    virtual void SetUserDataL( const TDesC8* aData );    
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protected:
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    /**
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     * Constructor
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     *
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     * @param aSession The session between the client proxy and the
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     * corresponding server object.
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     * @param aHandle The handle which identifies the server object
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     * that this proxy uses.
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     * @param aNodeMetadata Owns and uses the information of this proxy.
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     * The node also keeps track of the refence counts of its objects. 
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     * And handles the deletion of these objects when the total reference 
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     * count reaches zero.
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     * @return CNcdNodeUserDataProxy* Pointer to the created object 
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     * of this class.
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     */
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    CNcdNodeUserDataProxy(
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        MCatalogsClientServer& aSession,
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        TInt aHandle,
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        CNcdNodeMetadataProxy& aNodeMetadata );
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    /**
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     * ConstructL
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     */
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    virtual void ConstructL();
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    /**
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     * @return CNcdNodeProxy& Gives the node proxy that owns this class object.
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     * This node may be given for the operations. So, the operations may
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     * inform the node about the progress of or about the completion of the
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     * operation.
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     */
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    CNcdNodeMetadataProxy& NodeMetadata() const;
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private:
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    // Prevent if not implemented
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    CNcdNodeUserDataProxy( const CNcdNodeUserDataProxy& aObject );
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    CNcdNodeUserDataProxy& operator =( const CNcdNodeUserDataProxy& aObject );
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private: // data
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    CNcdNodeMetadataProxy& iNodeMetadata;
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    };
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#endif // C_NCD_NODE_USER_DATA_PROXY_H