convergedconnectionhandler/cchclientapi/inc/cchclientobserver.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 18 Jan 2010 20:12:36 +0200
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/*
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* Copyright (c) 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:  cch client api implementation class
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*
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*/
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#ifndef C_CCHCLIENTOBSERVER_H
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#define C_CCHCLIENTOBSERVER_H
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#include <e32base.h>
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#include <ccherror.h>
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#include <cchtypes.h>
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#include "cch.h"
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/**
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 *  Class for basic cch functionality, getting services
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 *
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 *  @code
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 *   ?good_class_usage_example(s)
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 *  @endcode
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 *
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 *  @lib cch
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 */
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class CCchClientObserver : public CActive
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    {
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public:
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    /**
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     * Two-phased constructor.
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     * 
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     * @param aCchService Cch service factory
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     */
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    static CCchClientObserver* NewL( CCchServiceImpl& aCchService ) ;
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    /**
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     * Two-phased constructor.
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     * 
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     * @param aCchService Cch service factory
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     */
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    static CCchClientObserver* NewLC( CCchServiceImpl& aCchService );
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    /**
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     * Destructor.
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     */
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    ~CCchClientObserver();
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    /**
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     * @deprecated Do not use this anymore, change to AddObserver!
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     * 
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     * Adds observer for listening service events
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     *
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     * @param aObserver Event observing class
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     */
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    void SetObserver( MCchServiceStatusObserver& aObserver );
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    /**
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     * @deprecated Do not use this anymore, change to 
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     * RemoveObserver method with paramater
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     * 
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     * Removes the observer of service events
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     */
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    void RemoveObserver( );
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    /**
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     * Adds observer for listening service events
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     *
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     * @param aObserver Event observing class
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     * @return KErrAlreadyExist Observer already added
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     *         KErrNone Observer was added
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     */
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    TInt AddObserver( MCchServiceStatusObserver& aObserver );
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    /**
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     * Removes the observer of service events
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     *
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     * @param aObserver Event observing class
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     * @return KErrNotFound Observer was not found
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     *         KErrNone Observer was removed
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     */
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    TInt RemoveObserver( MCchServiceStatusObserver& aObserver );
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private:
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    /**
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     * The constructor
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     * 
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     * @param aCchService Cch service factory
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     */
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	CCchClientObserver( CCchServiceImpl& aCchService );
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    /**
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     * By default Symbian 2nd phase constructor is private.
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     */
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    void ConstructL();
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private: //from CActive
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	/**
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	 * @see CActive.
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	 */
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	void RunL();
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	/**
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	 * @see CActive.
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	 */
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	void DoCancel();
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	/**
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	 * @see CActive.
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	 */
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	TInt RunError( TInt aError );
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private: // data
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	/**
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	 * cch service factory, not own
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	 */
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	CCchServiceImpl& iCchService;
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	/**
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	 * Service observer, not own
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	 */
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	MCchServiceStatusObserver* iBackwardSupportObserver;
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	/**
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	 * Stores service status information
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	 */
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    TPckgBuf<TServiceStatus> iServiceStatus;
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    // Observers
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    RPointerArray<MCchServiceStatusObserver> iObservers;
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#ifdef CCHUNITTEST
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    friend class UT_CCchService;
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#endif
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    };
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#endif // C_CCHCLIENTOBSERVER_H