/*

* Copyright (c) 2002-2004 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Sub Session Base.

*

*/

#ifndef CPHSRVSUBSESSIONBASE_H

#define CPHSRVSUBSESSIONBASE_H

// INCLUDES

#include <e32base.h>

// FORWARD DECLARATIONS

class CPhSrvSubSessionNotifier;

class CPhSrvSession;

// CLASS DECLARATION

/**

*  The base class for all subsessions.

*

*  @since 1.0

*/

class CPhSrvSubSessionBase : 

    public CObject, 

    public MPhSrvMessageProcessor

    {

    public:

        /*

        * The subsessions type.

        *

        *   EPhSrvSubSessionTypeUndefined        Undefined subsession, error.

        *   EPhSrvSubSessionTypeExternalCall     Call subsession.

        *   EPhSrvSubSessionTypeCallNotifier     CallNotifiers subsession.

        *   EPhSrvSubSessionTypeUssd             USSD subsession.

        *   EPhSrvSubSessionTypeIhf              IHF subsession.

        *   EPhSrvSubSessionTypeEmergencyNumber  Emergency number subsession.

        *   EPhSrvSubSessionTypeComHand          Command Handler subsession.

        *   EPhSrvSubSessionTypeComHandNotify    ComHand Notify subsession.

        *   EPhSrvSubSessionTypeMessenger        Messenger subsession.

        *   EPhSrvSubSessionTypeImageHandler     Image handler subsession.

        *   EPhSrvSubSessionTypeEmergencyCall    Emergency call subsession.

        */

        enum TPhSrvSubSessionType

            {

            EPhSrvSubSessionTypeUndefined = KErrNotFound,

            EPhSrvSubSessionTypeExternalCall    = 0,

            EPhSrvSubSessionTypeCallNotifier    = 1,

            EPhSrvSubSessionTypeUssd            = 2,

            EPhSrvSubSessionTypeIhf             = 3,

            EPhSrvSubSessionTypeEmergencyNumber = 4,

            EPhSrvSubSessionTypeComHand         = 5,

            EPhSrvSubSessionTypeComHandNotify   = 6,

            EPhSrvSubSessionTypeMessenger       = 7,

            EPhSrvSubSessionTypeImageHandler    = 8,

            EPhSrvSubSessionTypeEmergencyCall   = 9

            };

    public:  // Constructors and destructor

        /**

        * Create an instance of this class

        *

        * @param aSession The session where this subsession belongs.

        * @param aType The type of subsession that this object should represent.

        */

        CPhSrvSubSessionBase( 

            CPhSrvSession& aSession, 

            TPhSrvSubSessionType aType );

        /**

        * Complete construction of the subsession.

        */

        virtual void ConstructL() { }

    public: // Access

        /**

        * Return the owning session.

        *

        * @return A handle to the owning session.

        */

        CPhSrvSession& PhoneSession();

        /**

        * Return the owning session.

        *

        * @return A constant handle to the owning session.

        */

        const CPhSrvSession& PhoneSession() const;

        /**

        * Return the type of this sub-session object.

        *

        * @return The type of this sub-session object.

        */

        TPhSrvSubSessionType Type() const;

        /**

        * Return the unique handle associated with this subsession.

        *

        * @return The unique handle associated with a subsession.

        */

        TInt SubSessionUniqueHandle() const;

    public:

        /**

        * Writes to client address space and

        * catch bad descriptors.

        *

        * @param aMessage The client.

        * @param aPtr The location where the data is written.

        * @param aDes The data that is written.

        * @param aOffset The data location where to start the writing.

        */

        void Write( 

            const RMessage2& aMessage,

            TInt aLocation,

            const TDesC8& aDes,

            TInt aOffset = 0 );

        /**

        * Reads from client address space and

        * catch bad descriptors.

        *

        * @param aMessage The client.

        * @param aPtr The location where the data is read.

        * @param aDes The read data storage.

        * @param aOffset The data location where to start the reading.

        */

        void Read(

            const RMessage2& aMessage,

            TInt aLocation,

            TDes8& aDes,

            TInt aOffset = 0 );

    private: // Data

        // A handle to the session which owns this subsession.

        CPhSrvSession& iSession;

        // The type of sub-session that this object represents.

        TPhSrvSubSessionType iSubSessionType;

    };

#endif      // CPHSRVSUBSESSIONBASE_H

// End of File