// Copyright (c) 2008-2009 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:

//

/**

 @internalComponent

*/

#ifndef CPTPIPDATACONTINER_H_

#define CPTPIPDATACONTINER_H_

#include "ptpipdatatypes.h"

/**

 Defines the MTP PTPIP device class generic container dataset. 

 This will contain a data payload which will have the actual mtp data. 

 The structure would be as follows:

 1. packet length	4 bytes

 2. packet size		4 bytes

 3. payload = mtp data.

 */

class CPTPIPDataContainer : public CMTPTypeCompoundBase

	{

public:

	/**

	 PTPIP operation request dataset element identifiers.

	 */

	enum TElements

		{

		EPacketLength,

		EPacketType,

		ETransactionId,

		EPayload,

		ENumElements

		};

public:

	IMPORT_C static CPTPIPDataContainer* NewL();

	IMPORT_C ~CPTPIPDataContainer();

	IMPORT_C MMTPType* Payload() const;

	IMPORT_C void SetPayloadL(MMTPType* aPayload);

	IMPORT_C TInt FirstWriteChunk(TPtr8& aChunk);	

	IMPORT_C MMTPType* CommitChunkL(TPtr8& aChunk);

public:

	// From MMTPType	

	IMPORT_C TUint Type() const;

private:

	// From CMTPTypeCompoundBase

	const TElementInfo& ElementInfo(TInt aElementId ) const;	

private:

	CPTPIPDataContainer( );

	void ConstructL( );

private:

	/**

	 Data chunk identifiers.

	 */

	enum TChunkIds

		{

		/**

		 The flat data chunk ID.

		 */

		EIdFlatChunk,

		/**

		 The EMTPExtensions element data chunk ID.

		 */

		EIdPayloadChunk,

		/**

		 The number of data chunks.

		 */

		EIdNumChunks

		};

	/**

	 The flat data chunk comprising the header elements EPacketLength, EPacketType and the transaction Id

	 */

	RMTPTypeCompoundFlatChunk iChunkHeader;

	/**

	 The dataset element metadata table content.

	 */

	static const CMTPTypeCompoundBase::TElementInfo iElementMetaData[];

	/**

	 The dataset element metadata table.

	 */

	const TFixedArray<TElementInfo, ENumElements> iElementInfo;

	/**

	 The size in bytes of the header data chunk.

	 */

	static const TUint KFlatChunkSize;

private:

	MMTPType* iPayload;  // Not owned

	// If the Initiator sends the data in this form,

	// | ptp header| content part1 | ptp header | content part2 |

	// But,mtp framework gives us the payload as | content part1 | content part2 |

	// thus we need to ignore the ptp header that comes second time onwards.

	TInt iIsNextHeader;

	};

#endif /*CPTPIPCONTINERDATA_H_*/