/*

* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

* Definition of the Swi::Sis::CHash#

*

*/

/**

 @file 

 @released

 @internalTechnology

*/

#ifndef __SISHASH_H__

#define __SISHASH_H__

#include <e32base.h>

#include "sisfield.h"

#include "sisblob.h"

namespace Swi

{

namespace Sis

 {

 class TPtrProvider;

/**

 * This class represents a Sishash. Sishash is a basic structure found in  files.

 * It is described in SGL.GT0188.251.

 *

 * @released

 * @publishedPartner

 */

class CHash : public CField

	{

public:

	/**

	 * This creates a new CHash object.

	 *

	 * @param aDataProvider 	 An instance of a MSisDataProvider to read the entity from.

	 * @param aTypeReadBehaviour Whether we need to check the sis type or not.

	 *

	 * @return An instance of CHash representing the data read.	 	 	 	 	 

	 */

	IMPORT_C static CHash* NewL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour = EReadType);

	/**

	 * This creates a new CHash object and places it on the cleanup stack.

	 *

	 * @param aDataProvider 	 An instance of a MSisDataProvider to read the entity from.

	 * @param aTypeReadBehaviour Whether we need to check the sis type or not.

	 *

	 * @return An instance of CHash representing the data read.	 	 	 	 	 

	 */

	IMPORT_C static CHash* NewLC(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour = EReadType);

	/**

	 * This creates a new CHash object in place.

	 *

	 * @param aDataProvider 	 An instance of a TPtrProvider to read the entity from.

	 * @param aTypeReadBehaviour Whether we need to check the sis type or not.

	 *

	 * @return An instance of CHash representing the data read.	 	 	 	 	 

	 */

	IMPORT_C static CHash* NewL(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour = EReadType);

	/**

	 * This creates a new CHash object in place and places it on the cleanup stack.

	 *

	 * @param aDataProvider 	 An instance of a TPtrProvider to read the entity from.

	 * @param aTypeReadBehaviour Whether we need to check the sis type or not.

	 *

	 * @return An instance of CHash representing the data read.	 	 	 	 	 

	 */

	IMPORT_C static CHash* NewLC(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour = EReadType);

	IMPORT_C virtual ~CHash();

public: // Accessor

	inline TSISHashAlgorithm Algorithm() const;

	inline const TDesC8& Data() const;

private:

	CHash();

	/**

	 * The second-phase constructor.

	 *

	 * @param aDataProvider		 An instance of a MSisDataProvider to read the entity from.

	 * @param aTypeReadBehaviour Whether we need to check the sis type or not.

	 */

	void ConstructL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour);

	/**

	 * The second-phase constructor.

	 *

	 * @param aDataProvider		 An instance of a TPtrProvider to read the entity from.

	 * @param aTypeReadBehaviour Whether we need to check the sis type or not.

	 */

	void ConstructL(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour);

private:

	TSISHashAlgorithm iAlgorithm;

	CBlob* iBlob;

	};

// inline functions from CHash

TSISHashAlgorithm CHash::Algorithm() const

	{

	return iAlgorithm;

	}

const TDesC8& CHash::Data() const

	{

	return iBlob->Data();	

	}

 } // namespace Sis

} //namespace Swi

#endif