// Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// which accompanies this distribution, and is available

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

/**

 @file CProtTransaction.h 

 @warning : This file contains Rose Model ID comments - please do not delete

*/

#ifndef __CPROTTRANSACTION_H__

#define __CPROTTRANSACTION_H__

// System includes

#include <e32base.h>

#include <http/rhttptransaction.h>

// Forward declarations

class CTxData;

class CRxData;

class MRxDataObserver;

//##ModelId=3B1E52B30382

class CProtTransaction : public CBase

/** 

A representation of a transaction used by protocol handlers.

This class is lower-level than the RHTTPTransaction class,

since it owns objects that represent the request and response data as

transmitted and received over a transport medium.

@publishedAll

@released

*/

	{

public:	// Enums

/** The TTransactionState type defines the states of a transaction.

*/

	enum TTransactionState

		{

		/** Specifies that the transaction is pending servicing.

		*/

		EPending		= 0,

		/** Specifies that the transaction is being serviced - active.

		*/

		EActive,

		/** Specifies that the transaction has been cancelled.

		*/

		ECancelled,

		/** Specifies that the transaction has completed.

		*/

		ECompleted

		};

public:

/** 

	Intended Usage:	Destructor - cleans up and releases resources to the system

*/

	//##ModelId=3B1E52B40031

	IMPORT_C virtual ~CProtTransaction();

public: // accessors

/**	

	Provides the state of the transaction, e.g. pending, 

	active, etc.

	@return			A enum specifying the state of the transaction.

*/

	//##ModelId=3C4C37E50306

	TTransactionState TransactionState() const;

/**	

	Sets the state of the transaction.

	@param			aState	The state that the transaction is in.

	@post			The state of the transaction has been updated.

*/

	//##ModelId=3C4C37E502D4

	void SetTransactionState(TTransactionState aState);

/**	

	Resets the Rx data object. The Rx data object must be 

	created again to be used.

	@post			The Rx data objects has been reset.

*/

	//##ModelId=3C4C37E502CA

	IMPORT_C void ResetRxData();

/**	

	Resets the Tx data object. The Tx data object must be 

	created again to be used.

	@post			The Tx data objects has been reset.

*/

	//##ModelId=3C4C37E502C0

	IMPORT_C void ResetTxData();

/**	

	Obtain the API-level transaction to which this object

	corresponds to.

	@return			The API-level transaction that this object corresponds to.

*/

	//##ModelId=3B1E52B40013

	IMPORT_C RHTTPTransaction Transaction() const;

/**	

	Obtain the Transmit Data portion of the transaction.

	@return			A reference to the Tx data object of the transaction.

*/

	//##ModelId=3B1E52B40012

	IMPORT_C CTxData& TxData() const;

/**	

	Obtain the Receive Data portion of the transaction.

	@return			A reference to the Rx data object of the transaction.

*/

	//##ModelId=3B1E52B40009

	IMPORT_C CRxData& RxData() const;

public:	// Methods to be implemented by derived classes

/**	

	Intended Usage:	Creates the appropriate CTxData object.

	@leave			KErrNoMemory if there is not enough memory available to 

					create the object.

*/

	//##ModelId=3C4C37E502AC

	virtual void CreateTxDataL() =0;

/**	

	Intended Usage:	Creates the appropriate CRxData object.

	@leave			KErrNoMemory if there is not enough memory available to 

					create the object.

	@param			aObserver	A reference to the observer for the Rx data object.

*/

	//##ModelId=3C4C37E50284

	virtual void CreateRxDataL(MRxDataObserver& aObserver) =0;

protected: // Methods

/** 

	Default constructor	

*/

	//##ModelId=3B1E52B303E6

	CProtTransaction();

/** 

	Normal constructor, of a CProtTransaction that corresponds to the

	supplied client transaction handle.

	@param			aTrans	(in) The client transaction handle.

*/

	//##ModelId=3B1E52B303E7

	IMPORT_C CProtTransaction(RHTTPTransaction aTrans);

protected:	// Attributes

	/** The client transaction

	*/

	//##ModelId=3B1E52B303D4

	RHTTPTransaction iTrans;

	/** The transmission data

	*/

	//##ModelId=3B1E52B303CA

	CTxData* iTxData;

	/** The received data

	*/

	//##ModelId=3B1E52B303C0

	CRxData* iRxData;

	/** Transaction state indicator.

	*/

	//##ModelId=3C4C37E50247

	TTransactionState	iTransactionState;

private: // methods

/**	

	Intended Usage:	Reserve a slot in the v-table to preserve future BC

 */

	//##ModelId=3C4C37E5026F

	inline virtual void Reserved1();

/**	

	Intended Usage:	Reserve a slot in the v-table to preserve future BC

 */

	//##ModelId=3C4C37E50251

	inline virtual void Reserved2();

	};

inline void CProtTransaction::Reserved1()

	{}

inline void CProtTransaction::Reserved2()

	{}

#endif // __CPROTTRANSACTION_H__