// Copyright (c) 2007-2009 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:

//

#ifndef STREAMELEMENT_H

#define STREAMELEMENT_H

#include <e32base.h>

#include <s32mem.h>

#include <rm_debug_api.h>

#include <debuglogging.h>

/**

@internalTechnology 

@released

Pure virtual base class for streamable classes. 

Used when a class must be passed accross a client server interface

*/

class CStreamElementBase : public CBase

{

public:

	virtual ~CStreamElementBase()

		{

		}

	/** 

	Creates HBufC8 with a representation of ’this’ object

	*/

	IMPORT_C  HBufC8* MarshalDataL();

	TInt static MaxSize()

		{

		return 0;

		}

	virtual TInt Size() const = 0;

	// Initializes ’this’ from stream

	virtual void InternalizeL( RReadStream & aStream ) = 0;

	// Writes ’this’ to the stream

	virtual void ExternalizeL( RWriteStream & aStream, CBufFlat* buf ) = 0;

	TUint32 iSpare1;

	TUint32 iSpare2;

};

#endif // STREAMELEMENT_H