/*

* Copyright (c) 2006 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 C_ALFSRVSUBSESSIONBASE_H

#define C_ALFSRVSUBSESSIONBASE_H

#include <e32base.h>

class CAlfAppSrvSessionBase;

class MHuiVisualOwner;

class CHuiVisual;

class CHuiLayout;

class CHuiBrush;

class CHuiControl;

class CHuiControlGroup;

class MHuiMappingFunction;

class CAlfBrushHandler;

class MAlfExtension;

class CHuiDisplay;

/**

 *  Sub session base.

 *

 *  @lib alfappservercore.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS(CAlfSrvSubSessionBase) : public CObject

    {

public:

    /**

    * Public constructor

    */

    CAlfSrvSubSessionBase( CAlfAppSrvSessionBase& aSession );

    /**

    * static c-tor

    */

    static CAlfSrvSubSessionBase* NewLC(const RMessage2& aMessage, 

                                       TInt aImplementationUid,  

                                       TInt aImplementationId,

                                       CAlfAppSrvSessionBase& aSession);

    /**

     * Destructor

     */

    ~CAlfSrvSubSessionBase();

    /**

     * Processes message.

     *

     * @param aMessage

     */

    void ProcessMessageL(const RMessage2& aMessage);

    // Interfaces:

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual MHuiVisualOwner* AsVisualOwner();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual CHuiControl* AsHuiControl();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual CHuiVisual* AsHuiVisual();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual CHuiLayout* AsHuiLayout();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual CHuiBrush* AsHuiBrush();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual MHuiMappingFunction* AsMappingFunction();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual CHuiControlGroup* AsHuiControlCroup();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual CHuiDisplay* AsHuiDisplay();

    /**

     * needed for visual factory, only subsessions having instance implementing the interface 

     * should implement this virtual 

     */

    virtual CAlfBrushHandler* AsBrushHandler();

    /**

     * Request to complete pending asynchornous request(s)  

     * Initiated by client

     */

    virtual void CancelAsynchRequests();

    virtual MAlfExtension* AsCommandHandler();

    /**

    * Public member for session to check what factory was used to create this

    */

    TInt iFactoryUid;

protected:

    /**

     * Processes message. Meant for child class to implement.

     *

     * @param aMessage

     */

    virtual void DoProcessMessageL(const RMessage2& aMessage);

    /**

     * Returns the session this sub session belongs to.

     *

     * @return Session.

     */

    CAlfAppSrvSessionBase& Session();

    /**

     * must be base-called from deriving classes to finalize construction

     */

    virtual void ConstructL();

private:

    void ConstructL(const RMessage2& aMessage, 

                    TInt aImplementationUid,  

                    TInt aImplementationId );

private: // data

    CAlfAppSrvSessionBase& iSession; 

    class TPrivateData;                          

    TPrivateData* iData;

    };

#endif // C_ALFSRVSUBSESSIONBASE_H