cbs/CbsServer/ServerInc/CCbsTopicCollection.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 15:45:17 +0300
branchRCL_3
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Revision: 201033 Kit: 201035
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/*
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* Copyright (c) 2003 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:  This file contains the header file of the CCbsTopicCollection class.
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*    
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*                The server-side topic collection subsession class.
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*
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*/
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#ifndef     CCBSTOPICCOLLECTION_H
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#define     CCBSTOPICCOLLECTION_H
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//  INCLUDES
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#include "CCbsObject.h"
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#include "MCbsDbTopicCollectionObserver.H"
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//  FORWARD DECLARATIONS
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class CCbsSession;
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class CCbsDbImpTopicCollection;
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class CCbsDbImpTopicList;
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//  CLASS DECLARATION 
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/**
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*   CCbsTopicCollection is the server-side subsession object for handling
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*   CbsClient requests on topic identities of index messages.
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*/
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class CCbsTopicCollection : public CCbsObject, 
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    public MCbsDbTopicCollectionObserver
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    {
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    public:     // New functions
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        /**
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        *   Creates a new instance of the class.
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        *
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        *   @param  aSession        Session.
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        *   @param  aCollection     Topic collection manager.
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        *   @param  aList           Current topic list.
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        *   @return                 The new instance of the class.
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        */
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        static CCbsTopicCollection* NewL( CCbsSession& aSession, 
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            CCbsDbImpTopicCollection& aCollection, 
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            CCbsDbImpTopicList& aList );
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        /**
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        *   Destructor.
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        */
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        ~CCbsTopicCollection();
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    public:     // From CCbsObject
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        /**
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        *   Handles the requests for the subsession.
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        *
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        *   @param  aMessage        Message of the client
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        *   @return                 ETrue, if the request was handled here
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        */
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        TBool HandleRequestsL( const RMessage2& aMessage );
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    private:        // From MCbsDbTopicCollectionObserver
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        /**
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        *   Called whenever topic collection contents are changed.
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        */
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        void TopicCollectionContentsChangedInd();
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    private:
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        /**
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        *   Constructor.
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        *
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        *   @param  aSession        Session
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        *   @param  aCollection     Topic collection
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        *   @param aList            Current topic list
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        */
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        CCbsTopicCollection( CCbsSession& aSession, 
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            CCbsDbImpTopicCollection& aCollection, 
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            CCbsDbImpTopicList& aList );
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        /**
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        *   Finalizes the construction.
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        */
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        void ConstructL();
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        /**
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        *   Closes the subsession.
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        */
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        void CloseCollection();
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        /**
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        *   Returns the total amount of topic info records.
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        */
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        void GetTopicCountL();
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        /**
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        *   Returns a topic info structure to the client.
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        */
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        void GetTopicInfoL();
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        /**
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        *   Returns a truth value determining if the given topic already 
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        *   exists in the current topic list.
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        */
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        void TopicInListL();
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        /**
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        *   Sets up a notification so that the client will be notified when 
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        *   the collecton is changed.
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        */
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        void NotifyOnChange();
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        /**
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        *   Cancels the pending request.
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        */
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        void NotifyOnChangeCancel();
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        /**
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        *   Notifies the client
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        */
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        void Notify();
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    private:    // Prohibited operators and functions
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        // Copy constructor
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        CCbsTopicCollection( const CCbsTopicCollection& );
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        // Assignment operator
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        CCbsTopicCollection& operator=( const CCbsTopicCollection& );
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    private:    // Data
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        // Topic collection manager.
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        CCbsDbImpTopicCollection& iCollection;
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        /**
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        *   The current topic list which is needed to tell client
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        *   only of topics not included in the topic list.
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        */
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        CCbsDbImpTopicList& iTopicList;
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        // Indicates whether there is a pending notify request.
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        TBool iIsMessage;
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        // In case there is a pending notify request, this is the request.
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        RMessage2 iMessage;
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    };
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#endif      //  CCBSTOPICCOLLECTION_H
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// End of File
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