/*

* Copyright (c) 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:  NWSessionOperation base class.

*

*/

#ifndef CPENGNWSESSIONOPERATION_H

#define CPENGNWSESSIONOPERATION_H

//  INCLUDES

#include <E32Base.h>

// FORWARD DECLARATIONS

class MPEngNWSessionOperationOwner;

class CPEngNWSessionSlot2;

class MPEngNWSessionOperationObserver2;

class CPEngNWSessionSlotID2;

class CPEngTransactionStatus;

class CPEngNWSessionProxy;

// CLASS DECLARATION

/**

 * NWSessionOperation base class.

 *

 * Provides:

 * - adding to scheduler

 * - protection against nested canceling

 * - operation owning services

 *

 *  @lib

 *  @since 3.0

 */

NONSHARABLE_CLASS( CPEngNWSessionOperation ) : public CActive

    {

public:  // destructor

    /**

     * Destructor.

     */

    virtual ~CPEngNWSessionOperation();

protected: //Constructor

    /**

     * Constructor.

     */

    CPEngNWSessionOperation( TInt aPriority,

                             CPEngNWSessionProxy& aNWSessionProxy,

                             CPEngNWSessionSlot2& aInterface,

                             MPEngNWSessionOperationObserver2& aObserver );

    /**

     * Symbian OS base class constructor.

     */

    void BaseConstructL();

public:  // New external services

    /**

     * Sets the operation owner.

     * Owner can be set just once.

     */

    void SetOwner( MPEngNWSessionOperationOwner& aOperationOwner );

    /**

     * Cancels the operation if operation active

     * and not yet cancelled.

     *

     * Deletes also the operation object.

     */

    void CancelOpD();

protected:  // Services for derived implementations

    /**

     *

     */

    void HandleOperationIssued( TInt aError, TInt aNWSessionSlotOp );

    /**

     *

     */

    void NotifyObserverFromCancel();

protected:  // Template methods for derived implementations

    /**

     * Notifies derived implementation from

     * operation complete or failure with error.

     */

    virtual void DoHandleOpCompleted( TInt aError ) = 0;

private:  // Implementation

    void RunL();

    TInt RunError( TInt aError );

    //DoCancel() is implemented by the derived classes

protected:  // Data

    //REF:

    CPEngNWSessionProxy&    iNWSessionProxy;

private:  // Data

    //REF: The implemented interface

    CPEngNWSessionSlot2&     iInterface;

    //REF: The observer

    MPEngNWSessionOperationObserver2&  iObserver;

    //OWN: Is cancel call running?

    TBool   iCancelling;

    //REF: Operation owner

    MPEngNWSessionOperationOwner*   iOperationOwner;

    //OWN: Transaction status container for result

    CPEngTransactionStatus*     iTransactionStatus;

    //OWN: Session Slot operation identifier

    TInt    iNWSessionSlotOp;

    };

#endif  //CPENGNWSESSIONOPERATION_H