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 // Created on: 1993-09-06
 // Created by: Christian CAILLET
 // Copyright (c) 1993-1999 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_ReadWriteModule_HeaderFile
 #define _IGESData_ReadWriteModule_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_Type.hxx>
 
 #include <Interface_ReaderModule.hxx>
 #include <Standard_Integer.hxx>
 class Interface_FileReaderData;
 class Interface_Check;
 class Standard_Transient;
 class IGESData_IGESEntity;
 class IGESData_IGESReaderData;
 class IGESData_ParamReader;
 class IGESData_IGESWriter;
 
 //! Defines basic File Access Module, under the control of
 //! IGESReaderTool for Reading and IGESWriter for Writing :
 //! Specific actions concern : Read and Write Own Parameters of
 //! an IGESEntity.
 //! The common parts (Directory Entry, Lists of Associativities
 //! and Properties) are processed by IGESReaderTool & IGESWriter
 //!
 //! Each sub-class of ReadWriteModule is used in conjunction with
 //! a sub-class of Protocol from IGESData and processes several
 //! types of IGESEntity (typically, them of a package) :
 //! The Protocol gives a unique positive integer Case Number for
 //! each type of IGESEntity it recognizes, the corresponding
 //! ReadWriteModule processes an Entity by using the Case Number
 //! to known what is to do
 //! On Reading, the general service NewVoid is used to create an
 //! IGES Entity the first time
 //!
 //! Warning : Works with an IGESReaderData which stores "DE parts" of Items
 class IGESData_ReadWriteModule : public Interface_ReaderModule
 {
 
 public:
   //! Translates the Type of record <num> in <data> to a positive
   //! Case Number, or 0 if failed.
   //! Works with IGESReaderData which provides Type & Form Numbers,
   //! and calls CaseIGES (see below)
   Standard_EXPORT int CaseNum(const occ::handle<Interface_FileReaderData>& data,
                               const int                                    num) const override;
 
   //! Defines Case Numbers corresponding to the Entity Types taken
   //! into account by a sub-class of ReadWriteModule (hence, each
   //! sub-class of ReadWriteModule has to redefine this method)
   //! Called by CaseNum. Its result will then be used to call
   //! Read, etc ...
   Standard_EXPORT virtual int CaseIGES(const int typenum, const int formnum) const = 0;
 
   //! General Read Function. See IGESReaderTool for more info
   Standard_EXPORT void Read(const int                                    CN,
                             const occ::handle<Interface_FileReaderData>& data,
                             const int                                    num,
                             occ::handle<Interface_Check>&                ach,
                             const occ::handle<Standard_Transient>&       ent) const override;
 
   //! Reads own parameters from file for an Entity; <PR> gives
   //! access to them, <IR> detains parameter types and values
   //! For each class, there must be a specific action provided
   //! Note that Properties and Associativities Lists are Read by
   //! specific methods (see below), they are called under control
   //! of reading process (only one call) according Stage recorded
   //! in ParamReader
   Standard_EXPORT virtual void ReadOwnParams(const int                                   CN,
                                              const occ::handle<IGESData_IGESEntity>&     ent,
                                              const occ::handle<IGESData_IGESReaderData>& IR,
                                              IGESData_ParamReader& PR) const = 0;
 
   //! Writes own parameters to IGESWriter; defined for each class
   //! (to be redefined for other IGES ReadWriteModules)
   //! Warning : Properties and Associativities are directly managed by
   //! WriteIGES, must not be sent by this method
   Standard_EXPORT virtual void WriteOwnParams(const int                               CN,
                                               const occ::handle<IGESData_IGESEntity>& ent,
                                               IGESData_IGESWriter&                    IW) const = 0;
 
   DEFINE_STANDARD_RTTIEXT(IGESData_ReadWriteModule, Interface_ReaderModule)
 };
 
 #endif // _IGESData_ReadWriteModule_HeaderFile

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