// Copyright (c) 2001-2009 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:

// $Workfile: obexHeader.h $

// $Author: Stevep $

// $Revision: 13 $

// $Date: 25/03/02 10:57 $

// 

//

#if !defined (__OBEXHEADER_H__)

#define __OBEXHEADER_H__

#include <e32std.h> 

#include <e32base.h>    //CBase 

class CMsvStore;

class RMsvReadStream;

class RMsvWriteStream;

// Stream version -- increment by one each time the externalized data format changes

// for a significant release.

const TInt32 KObexMessageStreamVersion = 1;//<Stream version

const TInt KObexBadStreamVersion = 1;

class CObexMtmHeader : public CBase

/**

Base class for OBEX object headers. Allows them to be stored and restored to and from the

CMsvStore.

@internalTechnology

@released

*/

	{

public:

	/**

	* Destructor which deletes all of the HBufC members

	*/

    IMPORT_C ~CObexMtmHeader();

	/**

	 * Creates a stream in aStore and externalises this object to it.

	 *

	 *

	 * @param aStore The store to which this object is to be stored. Note this must be open with write access or 

	 *  this function will leave.

	 * @leave KErrXXX Standard EPOC stream leave codes.

	 * @leave KErrAccessDenied aStore is not opened with write access.

	 */

	IMPORT_C void StoreL(CMsvStore& aStore) const;

	/**

	 * Opens a stream in aStore and internalises this object from it.

	 * @param aStore The store from which this object is to be restored. Note this must be open with read or 

	 *  read/write access or this function will leave.

	 * @leave KErrXXX Standard EPOC stream leave codes. 

	 * @leave KErrAccessDenied aStore is not opened with read access.

	 */

	IMPORT_C void RestoreL(const CMsvStore& aStore);

	//Setters/Getters

	/**

	 * Returns the Name header value.

	 * @return The Name header value. This will be a zero-length descriptor if this Name has not been set.

	 */

	IMPORT_C TPtrC Name() const;

	/**

	 * Sets the Name header value.

	 * @param aName The new Name header value

	 * @leave KErrXXX Standard EPOC error codes if allocation of a buffer to hold the Name header fails.

	 */

    IMPORT_C void SetNameL(const TDesC& aSubject);

	/**

	 * Returns the Subject header value.

	 * @return The Subject header value. This will be a zero-length descriptor if this Subject has not been set.

	 */

    IMPORT_C TPtrC Subject() const;

	/**

	 * Sets the Subject header value.

	 *

	 * @param aName The new Subject header value

	 * @leave KErrXXX Standard EPOC error codes if allocation of a buffer to hold the Subject header fails.

	 */

	IMPORT_C void SetSubjectL(const TDesC& aSubject);

    /**

	 * Returns the Type header value.

	 * @return The Type header value. This will be a zero-length descriptor if this Type has not been set.

	 */

	IMPORT_C TPtrC8 Type() const;

	/**

	 * Sets the Type header value.

	 *

	 * @param aType The new Type header value

	 * @leave KErrXXX Standard EPOC error codes if allocation of a buffer to hold the Type header fails.

	 */

	IMPORT_C void SetTypeL(const TDesC8& aSubject);

    /**

	 * Returns the Target header value.

	 * @return The Target header value. This will be a zero-length descriptor if this Target has not been set.

	 */

	IMPORT_C TPtrC8 Target() const;

	/**

	 * Sets the ConnectionID header value.

	 * 

	 * @param ConnectionID The new Target header value

	 * @leave KErrXXX Standard EPOC error codes if allocation of a buffer to hold the Target header fails.

	 */

	IMPORT_C void SetTargetL(const TDesC8& aSubject);

    /**

	 * Returns the ConnectionID header value.

	 * @return The ConnectionID header value. This will be a zero-length descriptor if this ConnectionID has not been set.

	 */

	IMPORT_C TPtrC8 ConnectionID() const;

	/**

	 * Sets the ConnectionID header value.

	 * 

	 * @param ConnectionID The new ConnectionID header value

	 * @leave KErrXXX Standard EPOC error codes if allocation of a buffer to hold the ConnectionID header fails.

	 */

	IMPORT_C void SetConnectionIDL(const TDesC8& aSubject);

	/**

	 * Returns the Length header value

	 * @return Length header value

	 */

	IMPORT_C TInt Length() const;

	/**

	 * Sets the Length header value

	 * @param aLength The new Length header value

	 */

	IMPORT_C void SetLength(TInt aLength);

	/**

	 * Returns the Time header value

	 * @return Time header value

	 */

	IMPORT_C const TTime& Time() const;

	/**

	 * Sets the Time header value

	 * @param aTime The new Time header value

	 */

	IMPORT_C void SetTime(const TTime& aTime);

	//Transport specific address getter, therefore implemented in the derived classes

    IMPORT_C virtual TPtrC8 Addr() const = 0;

	//Transport specific address setter, therefore implemented in the derived classes

    IMPORT_C virtual void SetAddrL(const TDesC8& aSubject) = 0;

	//Called by Store/Restore -- must be implemented in the derived class and call BaseInternaliseL first

    IMPORT_C virtual void InternalizeL(RMsvReadStream& aReadStream) = 0;

	//Called by Store/Restore -- must be implemented in the derived class and call BaseExternaliseL first

    IMPORT_C virtual void ExternalizeL(RMsvWriteStream& aWriteStream) const = 0;

protected:

	//Base class functions that MUST be called by the derived classes

	/**

	 * Internalizes the CObexMtmHeader object from a stream.Must be called by the derived class BEFORE 

	 * that class internalizes

	 *

	 * @param aReadStream The stream to be read from

	 * @leave KErrXXX Standard EPOC stream leave codes

	 */

	IMPORT_C void BaseInternalizeL(RMsvReadStream& aReadStream);

	/**

	 * Externalizes CObexMtmHeader object to a stream. Must be called by the derived class BEFORE 

	 * that class externalizes

	 * @param aWriteStream The stream to be written to

	 * @leave KErrXXX Standard EPOC stream leave codes

	 */

    IMPORT_C void BaseExternalizeL(RMsvWriteStream& aWriteStream) const;

	/**

	 * Leaving constructor, which must be called by the base classes to initialise the HBufC members

	 */

	IMPORT_C void BaseConstructL();

protected:

	/**

	 * Default constructor, which assigns the TUid for the stream and stream version

	 *

	 * @param aStreamUid Uid of the header stream--specified in the derived class

	 * @param aStreamVersion Version number for the stream, must be specified in the derived classes 

	 * and incremented each time a new version of the stream is implemented.

	 */

	IMPORT_C CObexMtmHeader(TUid aStreamUid, TInt32 aStreamVersion);

protected:

	HBufC*			iName; //< The name of the Obex object

	HBufC*			iSubject; //< The subject of the Obex object

	HBufC8*			iType; //< The type of the Obex object

	TInt			iLength; //< The size of the Obex object

	TTime			iTime; //< Date and time of last modification of Obex object

	HBufC8*			iTarget; //< Byte sequence identifying intended target

	HBufC8*			iConnectionID; //< The transport type

	const TUid		iStreamUid; //< Uid of the header stream

	const TInt32	iStreamVersion; //< Version number for the streams

	};

#endif	//!defined (__OBEXHEADER_H__)