0026961: Recover possibility to read files in old persistence format

[occt.git] / src / StdLPersistent / StdLPersistent_Void.hxx

// Copyright (c) 2015 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 _StdLPersistent_Void_HeaderFile
#define _StdLPersistent_Void_HeaderFile

#include <StdObjMgt_Attribute.hxx>

#include <TDataStd_Directory.hxx>
#include <TDataStd_Tick.hxx>
#include <TDataStd_NoteBook.hxx>


class StdLPersistent_Void
{
protected:
  template <class AttribClass>
  class instance : public StdObjMgt_Attribute<AttribClass>::Static
  {
  public:
    //! Read persistent data from a file.
    Standard_EXPORT virtual void Read (StdObjMgt_ReadData&) {}

    //! Import transient attribuite from the persistent data
    Standard_EXPORT virtual void ImportAttribute() {}
  };

public:
  typedef instance<TDataStd_Directory> Directory;
  typedef instance<TDataStd_Tick>      Tick;
  typedef instance<TDataStd_NoteBook>  NoteBook;
};

#endif