// Copyright (c) 2006-2009 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:

// 

/**

@file

@publishedPartner

@released

*/

#ifndef CMTPTYPELIST_H_

#define CMTPTYPELIST_H_

#include <e32std.h>

#include <mtp/rmtptype.h>

#include <mtp/cmtptypecompoundbase.h>

#include <mtp/mtpdatatypeconstants.h>

class CMTPTypeList : public CMTPTypeCompoundBase

    {

public:

    IMPORT_C static CMTPTypeList* NewL(TMTPTypeIds aListType, TMTPTypeIds aElementType);

    IMPORT_C static CMTPTypeList* NewLC(TMTPTypeIds aListType, TMTPTypeIds aElementType);

    IMPORT_C virtual ~CMTPTypeList();

    IMPORT_C virtual void AppendL(const MMTPType* aElement);

    IMPORT_C virtual void Remove(const TInt aIndex);

    IMPORT_C virtual TInt ElementType() const;

    IMPORT_C virtual TUint32 NumberOfElements() const;

    IMPORT_C MMTPType& ElementL(const TInt aIndex) const;

    IMPORT_C void ResetAndDestroy();

public: // From CMTPTypeCompoundBase

    IMPORT_C virtual TInt FirstWriteChunk(TPtr8& aChunk);

    IMPORT_C virtual TInt NextWriteChunk(TPtr8& aChunk);

    IMPORT_C virtual TUint Type() const;

    IMPORT_C virtual TBool CommitRequired() const;

    IMPORT_C virtual MMTPType* CommitChunkL(TPtr8& aChunk); 

    IMPORT_C virtual TInt NextWriteChunk(TPtr8& aChunk, TUint aDataLength);

private: // From CMTPTypeCompoundBase

    const TElementInfo& ElementInfo(TInt aElementId) const;

    TInt ValidateChunkCount() const;

protected:

	CMTPTypeList(TInt aArrayType, TInt aElementType);

	void InitListL();

private:

    void ConstructL();

    TInt UpdateWriteSequenceErr(TInt aErr);

    void AppendElementChunkL(const MMTPType* aElement);

private:

    /**

    The write data stream states.

    */

    enum TReadWriteSequenceState

        {

        /**

        Data stream is inactive.

        */

        EIdle,

        /**

        Elements data stream is in progress.

        */

        EElementChunks,          

        };

private:

    /**

    The write data stream error state. 

    */

    TUint                                           iWriteSequenceErr;

    /**

    The write data stream state variable. 

    */

    TUint                                           iWriteSequenceState;

    /**

    The NumberOfElements element metadata content.

    */

    CMTPTypeCompoundBase::TElementInfo              iInfoNumberOfElements;

    /**

    The Element array metadata content. Note that this is declared mutable 

    to allow state updates while processing a read data stream.

    */

    mutable CMTPTypeCompoundBase::TElementInfo      iInfoElement;

    TInt                                            iListType;

    TInt                                            iElementType;

    static const TUint                              KChunckNumberOfHeader;

    static const TUint                              KChunkNumberofElements;

    TMTPTypeUint32                                  iChunkNumberOfElements;    

    RPointerArray<MMTPType>                         iChunksElement;

    };

#endif /* CMTPTYPELIST_H_ */