inc/CPEngReactAuthNotifier.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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* Copyright (c) 2004 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:  Notifier API to listen presence reactive authorization changes.
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*
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*/
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#ifndef __CPENGREACTAUTHNOTIFIER_H
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#define __CPENGREACTAUTHNOTIFIER_H
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//  INCLUDES
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#include <E32Base.h>
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#include <BamDescA.h>
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//FORWARD DECLARATIONS
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class MPEngReactAuthObserver;
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class CPEngReactAuthNotifierImp;
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class CPEngNWSessionSlotID2;
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// CLASS DECLARATION
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/**
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 * Notifier API for presence reactive authorization events.
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 *
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 * With this API clients can receive notifications from
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 * changes in presence reactive authorizations.
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 *
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 * @lib PEngManager2.lib
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 * @since 3.0
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 */
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class CPEngReactAuthNotifier : public CBase
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    {
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        //-----------------------------------------------------------------------
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    public: /* Construction */
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        /**
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         * Instantiates CPEngReactAuthNotifier object.
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         *
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         * Instantiates CPEngReactAuthNotifier object and connects it to
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         * identified Presence Engine side NWSessionSlot. NWSessionSlot
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         * must be a valid, existing slot.
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         *
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         * Errors:
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         *  - Requested NWSessionSlot not found: KErrNotFound
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         *  - Given NWSessionSlotID malformed: KErrArgument
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         *
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         * @param aNWSessionSlotID The session slot ID to identify the
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         * session slot.
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         * @param aPriority The priority for CPEngPresenceNotifier2
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         * client side active objects. These active objects are used when
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         * asynchronously delivering events to observers.
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         *
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         * @return New CPEngPresenceNotifier2 instance.
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         */
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        IMPORT_C static CPEngReactAuthNotifier* NewL(
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            const CPEngNWSessionSlotID2& aNWSessionSlotID,
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            TInt aPriority = CActive::EPriorityStandard );
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        IMPORT_C static CPEngReactAuthNotifier* NewLC(
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            const CPEngNWSessionSlotID2& aNWSessionSlotID,
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            TInt aPriority = CActive::EPriorityStandard );
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        /**
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         * Destructor.
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         * Virtual by CBase.
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         */
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        ~CPEngReactAuthNotifier();
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    protected:
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        CPEngReactAuthNotifier();
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        //-----------------------------------------------------------------------
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    public: /* Basic reactive authorization notifier */
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        /**
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         * Check if the notifier is active.
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         *
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         * @since 3.0
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         * @return ETrue if the notifier is active. Else EFalse.
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         */
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        IMPORT_C TBool IsActive() const;
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        /**
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         * Starts notifying reactive authorization events.
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         *
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         * @since 3.0
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         * @param aOptions Reserved for future notify options.
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         * @return Result from observer start.
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         * - KErrNone if notifier start succeeds.
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         * - KErrInUse if notifier already started.
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         * - Else one of system wide error codes.
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         */
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        IMPORT_C TInt Start( TInt aOptions = 0 );
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        /**
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         * Stops observing reactive authorization changes.
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         *
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         * @since 3.0
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         */
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        IMPORT_C void Stop();
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        //-----------------------------------------------------------------------
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    public: /* reactive authorization observers */
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        /**
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         * Registers observer to be notified from reactive authorization changes.
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         *
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         * Observers are notified in their registeration order.
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         * (First registered is notified first.)
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         *
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         * @param aObserver The observer to be notified.
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         * @return KErrNone is observer added succesfully.
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         *         Else one of the system wide error codes.
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         */
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        IMPORT_C TInt AddObserver(
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            MPEngReactAuthObserver& aObserver );
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        /**
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         * Unregisters reactive authorization observer.
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         *
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         * @param aObserver The observer to remove.
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         * @return KErrNone is observer removed succesfully.
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         *         KErrNotFound if the observer wasn't registered.
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         */
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        IMPORT_C TInt RemoveObserver(
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            MPEngReactAuthObserver& aObserver );
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        //-----------------------------------------------------------------------
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    private: /* Data */
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        //OWN: Implementation
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        CPEngReactAuthNotifierImp*     iImp;
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    };
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#endif  //__CPENGREACTAUTHNOTIFIER_H
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// End of File
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