// Created on: 1997-12-01
// Created by: Jean-Louis Frenkel
// Copyright (c) 1997-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _PCDM_ReferenceIterator_HeaderFile
#define _PCDM_ReferenceIterator_HeaderFile

#include "Standard.hxx"
#include "Standard_Type.hxx"

#include "PCDM_Reference.hxx"
#include "NCollection_Sequence.hxx"
#include "TCollection_ExtendedString.hxx"
#include "NCollection_DataMap.hxx"

class Message_Messenger;
class CDM_Document;
class CDM_MetaData;
class CDM_Application;

class PCDM_ReferenceIterator : public Standard_Transient
{

public:
  //! Warning! The constructor does not initialization.
  Standard_EXPORT PCDM_ReferenceIterator(const occ::handle<Message_Messenger>& theMessageDriver);

  Standard_EXPORT void LoadReferences(const occ::handle<CDM_Document>&    aDocument,
                                      const occ::handle<CDM_MetaData>&    aMetaData,
                                      const occ::handle<CDM_Application>& anApplication,
                                      const bool                          UseStorageConfiguration);

  Standard_EXPORT virtual void Init(const occ::handle<CDM_MetaData>& aMetaData);

  DEFINE_STANDARD_RTTIEXT(PCDM_ReferenceIterator, Standard_Transient)

private:
  Standard_EXPORT virtual bool More() const;

  Standard_EXPORT virtual void Next();

  Standard_EXPORT virtual occ::handle<CDM_MetaData> MetaData(
    NCollection_DataMap<TCollection_ExtendedString, occ::handle<CDM_MetaData>>& theLookUpTable,
    const bool UseStorageConfiguration) const;

  Standard_EXPORT virtual int ReferenceIdentifier() const;

  //! returns the version of the document in the reference
  Standard_EXPORT virtual int DocumentVersion() const;

private:
  NCollection_Sequence<PCDM_Reference> myReferences;
  int                                  myIterator;
  occ::handle<Message_Messenger>       myMessageDriver;
};

#endif // _PCDM_ReferenceIterator_HeaderFile