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 // Created on: 1992-04-07
 // Created by: Christian CAILLET
 // Copyright (c) 1992-1999 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 _IGESData_UndefinedEntity_HeaderFile
 #define _IGESData_UndefinedEntity_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_Type.hxx>
 
 #include <Standard_Integer.hxx>
 #include <IGESData_IGESEntity.hxx>
 #include <IGESData_DefType.hxx>
 #include <IGESData_DefList.hxx>
 class Interface_UndefinedContent;
 class IGESData_IGESReaderData;
 class IGESData_DirPart;
 class Interface_Check;
 class IGESData_ParamReader;
 class IGESData_IGESWriter;
 
 //! undefined (unknown or error) entity specific of IGES
 //! DirPart can be correct or not : if it is not, a flag indicates
 //! it, and each corrupted field has an associated error flag
 class IGESData_UndefinedEntity : public IGESData_IGESEntity
 {
 
 public:
   //! creates an unknown entity
   Standard_EXPORT IGESData_UndefinedEntity();
 
   //! Returns own data as an UndefinedContent
   Standard_EXPORT occ::handle<Interface_UndefinedContent> UndefinedContent() const;
 
   //! Returns own data as an UndefinedContent, in order to touch it
   Standard_EXPORT occ::handle<Interface_UndefinedContent> ChangeableContent();
 
   //! Redefines a completely new UndefinedContent
   //! Used by a Copy which begins by ShallowCopy, for instance
   Standard_EXPORT void SetNewContent(const occ::handle<Interface_UndefinedContent>& cont);
 
   //! says if DirPart is OK or not (if not, it is erroneous)
   //! Note that if it is not, Def* methods can return Error status
   Standard_EXPORT bool IsOKDirPart() const;
 
   //! returns Directory Error Status (used for Copy)
   Standard_EXPORT int DirStatus() const;
 
   //! Erases the Directory Error Status
   //! Warning : Be sure that data are consistent to call this method ...
   Standard_EXPORT void SetOKDirPart();
 
   //! returns Error status if necessary, else calls original method
   Standard_EXPORT IGESData_DefType DefLineFont() const override;
 
   //! returns Error status if necessary, else calls original method
   Standard_EXPORT IGESData_DefList DefLevel() const override;
 
   //! returns Error status if necessary, else calls original method
   Standard_EXPORT IGESData_DefList DefView() const override;
 
   //! returns Error status if necessary, else calls original method
   Standard_EXPORT IGESData_DefType DefColor() const override;
 
   //! returns Error status if necessary, else calls original method
   //! (that is, if SubScript field is not blank or positive integer)
   Standard_EXPORT bool HasSubScriptNumber() const override;
 
   //! Computes the Directory Error Status, to be called before
   //! standard ReadDir from IGESReaderTool
   //! Returns True if OK (hence, Directory can be loaded),
   //! Else returns False and the DirPart <DP> is modified
   //! (hence, Directory Error Status is non null; and standard Read
   //! will work with an acceptable DirectoryPart)
   Standard_EXPORT virtual bool ReadDir(const occ::handle<IGESData_IGESReaderData>& IR,
                                        IGESData_DirPart&                           DP,
                                        occ::handle<Interface_Check>&               ach);
 
   //! reads own parameters from file; PR gives access to them, IR
   //! detains parameter types and values
   //! Here, reads all parameters, integers are considered as entity
   //! reference unless they cannot be; no list interpretation
   //! No property or associativity list is managed
   Standard_EXPORT virtual void ReadOwnParams(const occ::handle<IGESData_IGESReaderData>& IR,
                                              IGESData_ParamReader&                       PR);
 
   //! writes parameters to IGESWriter, taken from UndefinedContent
   Standard_EXPORT virtual void WriteOwnParams(IGESData_IGESWriter& IW) const;
 
   DEFINE_STANDARD_RTTIEXT(IGESData_UndefinedEntity, IGESData_IGESEntity)
 
 private:
   int                                     thedstat;
   occ::handle<Interface_UndefinedContent> thecont;
 };
 
 #endif // _IGESData_UndefinedEntity_HeaderFile

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