mtpfws/mtpfw/datatypes/interface/cmtptypeinterdependentpropdesc.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 19 Aug 2010 10:44:03 +0300
branchRCL_3
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// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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/**
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 @file
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 @publishedPartner
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 @released
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*/
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#ifndef CMTPTYPEINTERDEPENDENTPROPDESC_H
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#define CMTPTYPEINTERDEPENDENTPROPDESC_H
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#include <e32std.h>
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#include <mtp/cmtptypecompoundbase.h>
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class CMTPTypeInterdependentProperties;
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class CMTPTypeObjectPropDesc;
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/** 
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Defines the MTP InterdependentPropDesc dataset. The InterdependentPropDesc 
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implements an array of MTP ObjectPropDesc arrays, each describing a permissable
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collection of ranges. Each array of MTP ObjectPropDesc datasets gives one 
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possible definition for the interdependent properties that are contained in 
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that array; properties not found in that array are constrained only by the 
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usual ObjectPropDesc datasets. This dataset is used in the 
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GetInterdependentPropDesc request.
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@publishedPartner
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@released 
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*/ 
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class CMTPTypeInterdependentPropDesc : public CMTPTypeCompoundBase
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    {
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public:
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    IMPORT_C static CMTPTypeInterdependentPropDesc* NewL();
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    IMPORT_C static CMTPTypeInterdependentPropDesc* NewLC();
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    IMPORT_C virtual ~CMTPTypeInterdependentPropDesc();  
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    IMPORT_C void AppendL(CMTPTypeInterdependentProperties* aInterdependentProperties);
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    IMPORT_C TUint32 NumberOfInterdependencies() const;
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    IMPORT_C CMTPTypeInterdependentProperties& InterdependentProperties(TUint aIndex) const;  
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public: // From CMTPTypeCompoundBase
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    IMPORT_C TInt FirstWriteChunk(TPtr8& aChunk);
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    IMPORT_C TInt NextWriteChunk(TPtr8& aChunk);
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    IMPORT_C TUint Type() const;
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    IMPORT_C TBool CommitRequired() const;
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    IMPORT_C MMTPType* CommitChunkL(TPtr8& aChunk); 
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private: // From CMTPTypeCompoundBase
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    const TElementInfo& ElementInfo(TInt aElementId) const;
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    TInt ValidateChunkCount() const;
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private:
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    CMTPTypeInterdependentPropDesc();
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    void ConstructL();
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    void AppendElementChunkL(CMTPTypeInterdependentProperties* aElement);
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    TInt UpdateWriteSequenceErr(TInt aErr);
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private: // Owned
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    /**
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    The write data stream states.
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    */
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    enum TReadWriteSequenceState
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        {
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        /**
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        Data stream is inactive.
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        */
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        EIdle,
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        /**
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        Data stream is in progress.
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        */
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        EInProgress            
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        };
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    /**
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    The NumberOfInterdependencies element data chunk ID.
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    */
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    static const TUint                              KNumberOfInterdependenciesChunk;
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    /**
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    The InterdependentProperties array starting element data chunk ID.
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    */
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    static const TUint                              KInterdependentPropertiesChunks;
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    /**
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    The write data stream error state. 
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    */
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    TInt                                            iWriteSequenceErr;
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    /**
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    The write data stream state variable. 
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    */
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    TUint                                           iWriteSequenceState;
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    /**
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    The NumberOfInterdependencies element metadata content.
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    */
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    CMTPTypeCompoundBase::TElementInfo              iInfoNumberOfInterdependencies;
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    /**
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    The InterdependentProperties elements array metadata content. Note that this is 
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    declared mutable to allow state updates while processing a read data stream.
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    */
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    mutable CMTPTypeCompoundBase::TElementInfo      iInfoInterdependentProperties;
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    /**
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    The NumberOfInterdependencies data chunk.
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    */
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    TMTPTypeUint32                                  iChunkNumberOfInterdependencies;
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    /**
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    The InterdependentProperties elements array data chunks.
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    */
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    RPointerArray<CMTPTypeInterdependentProperties> iChunksInterdependentProperties;
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    };
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/**
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Defines the MTP InterdependentPropDesc array element dataset. The 
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InterdependentPropDesc array element dataset is itself an array of MTP 
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ObjectPropDesc datasets that specifies one possible definition for the 
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interdependent properties that are contained in that array.
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*/
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class CMTPTypeInterdependentProperties : public CMTPTypeCompoundBase
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    {
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public:
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    IMPORT_C static CMTPTypeInterdependentProperties* NewL();
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    IMPORT_C static CMTPTypeInterdependentProperties* NewLC();
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    IMPORT_C virtual ~CMTPTypeInterdependentProperties();  
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    IMPORT_C void AppendL(CMTPTypeObjectPropDesc* aObjectPropDesc);
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    IMPORT_C TUint32 NumberOfPropDescs() const;
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    IMPORT_C CMTPTypeObjectPropDesc& ObjectPropDesc(TUint aIndex) const;  
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public: // From CMTPTypeCompoundBase
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    IMPORT_C TInt FirstWriteChunk(TPtr8& aChunk);
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    IMPORT_C TInt NextWriteChunk(TPtr8& aChunk);
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    IMPORT_C TUint Type() const;
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    IMPORT_C TBool CommitRequired() const;
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    IMPORT_C MMTPType* CommitChunkL(TPtr8& aChunk); 
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private: // From CMTPTypeCompoundBase
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    const TElementInfo& ElementInfo(TInt aElementId) const;
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    TInt ValidateChunkCount() const;
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private:
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    CMTPTypeInterdependentProperties();
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    void ConstructL();
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    void AppendElementChunkL(CMTPTypeObjectPropDesc* aElement);
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    TInt UpdateWriteSequenceErr(TInt aErr);
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private: // Owned
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    /**
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    The write data stream states.
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    */
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    enum TReadWriteSequenceState
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        {
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        /**
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        Data stream is inactive.
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        */
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        EIdle,
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        /**
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        Data stream is in progress.
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        */
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        EInProgress            
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        };
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    /**
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    The NumberOfPropDescs element data chunk ID.
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    */
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    static const TUint                          KNumberOfPropDescsChunk;
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    /**
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    The ObjectPropDesc array starting element data chuck ID.
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    */
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    static const TUint                          KObjectPropDescChunks;
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    /**
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    The write data stream error state. 
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    */
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    TInt                                        iWriteSequenceErr;
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    /**
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    The write data stream state variable. 
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    */
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    TUint                                       iWriteSequenceState;
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    /**
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    The NumberOfPropDescs element metadata content.
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    */
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    CMTPTypeCompoundBase::TElementInfo          iInfoNumberOfPropDescs;
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    /**
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    The ObjectPropDesc array elements metadata content. Note that this is 
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    declared mutable to allow state updates while processing a read data stream.
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    */
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    mutable CMTPTypeCompoundBase::TElementInfo  iInfoObjectPropDesc;
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    /**
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    The NumberOfPropDescs element data chunk.
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    */
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    TMTPTypeUint32                              iChunkNumberOfPropDescs;
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    /**
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    The ObjectPropDesc elements array data chunks.
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    */
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    RPointerArray<CMTPTypeObjectPropDesc>       iChunksObjectPropDesc;
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    };
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#endif // CMTPTYPEINTERDEPENDENTPROPDESC_H