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 // Created on: 1996-07-08
 // Created by: Christian CAILLET
 // Copyright (c) 1996-1999 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 _STEPControl_Reader_HeaderFile
 #define _STEPControl_Reader_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <XSControl_Reader.hxx>
 #include <Standard_Integer.hxx>
 #include <StepData_ConfParameters.hxx>
 #include <TColStd_SequenceOfAsciiString.hxx>
 #include <TColStd_Array1OfAsciiString.hxx>
 #include <TColStd_Array1OfReal.hxx>
 class XSControl_WorkSession;
 class StepData_StepModel;
 class StepRepr_RepresentationContext;
 
 
 //! Reads STEP files, checks them and translates their contents
 //! into Open CASCADE models. The STEP data can be that of
 //! a whole model or that of a specific list of entities in the model.
 //! As in XSControl_Reader, you specify the list using a selection.
 //! For the translation of iges files it is possible to use next sequence:
 //! To change translation parameters
 //! class Interface_Static should be used before beginning of
 //! translation  (see STEP Parameters and General Parameters)
 //! Creation of reader - STEPControl_Reader reader;
 //! To load s file in a model use method reader.ReadFile("filename.stp")
 //! To print load results reader.PrintCheckLoad(failsonly,mode)
 //! where mode is equal to the value of enumeration IFSelect_PrintCount
 //! For definition number of candidates :
 //! Standard_Integer nbroots = reader. NbRootsForTransfer();
 //! To transfer entities from a model the following methods can be used:
 //! for the whole model - reader.TransferRoots();
 //! to transfer a list of entities: reader.TransferList(list);
 //! to transfer one entity Handle(Standard_Transient)
 //! ent = reader.RootForTransfer(num);
 //! reader.TransferEntity(ent), or
 //! reader.TransferOneRoot(num), or
 //! reader.TransferOne(num), or
 //! reader.TransferRoot(num)
 //! To obtain the result the following method can be used:
 //! reader.NbShapes() and reader.Shape(num); or reader.OneShape();
 //! To print the results of transfer use method:
 //! reader.PrintCheckTransfer(failwarn,mode);
 //! where printfail is equal to the value of enumeration
 //! IFSelect_PrintFail, mode see above; or reader.PrintStatsTransfer();
 //! Gets correspondence between a STEP entity and a result
 //! shape obtained from it.
 //! Handle(XSControl_WorkSession)
 //! WS = reader.WS();
 //! if ( WS->TransferReader()->HasResult(ent) )
 //! TopoDS_Shape shape = WS->TransferReader()->ShapeResult(ent);
 class STEPControl_Reader  : public XSControl_Reader
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! Creates a reader object with an empty STEP model.
   Standard_EXPORT STEPControl_Reader();
   
   //! Creates a Reader for STEP from an already existing Session
   //! Clears the session if it was not yet set for STEP
   Standard_EXPORT STEPControl_Reader(const Handle(XSControl_WorkSession)& WS, const Standard_Boolean scratch = Standard_True);
   
   //! Returns the model as a StepModel.
   //! It can then be consulted (header, product)
   Standard_EXPORT Handle(StepData_StepModel) StepModel() const;
 
   //! Loads a file and returns the read status
   //! Zero for a Model which compies with the Controller
   Standard_EXPORT virtual IFSelect_ReturnStatus ReadFile(const Standard_CString filename) Standard_OVERRIDE;
 
   //! Loads a file from stream and returns the read status
   Standard_EXPORT virtual IFSelect_ReturnStatus ReadStream(const Standard_CString theName,
                                                            std::istream& theIStream) Standard_OVERRIDE;
 
   //! Loads a file and returns the read status
   //! Zero for a Model which compies with the Controller
   Standard_EXPORT IFSelect_ReturnStatus ReadFile(const Standard_CString filename,
                                                  const StepData_ConfParameters& theParams);
 
   //! Loads a file from stream and returns the read status
   Standard_EXPORT IFSelect_ReturnStatus ReadStream(const Standard_CString theName,
                                                    const StepData_ConfParameters& theParams,
                                                    std::istream& theIStream);
   
   //! Transfers a root given its rank in the list of candidate roots
   //! Default is the first one
   //! Returns True if a shape has resulted, false else
   //! Same as inherited TransferOneRoot, kept for compatibility
   Standard_EXPORT Standard_Boolean TransferRoot (const Standard_Integer num = 1,
                                                  const Message_ProgressRange& theProgress = Message_ProgressRange());
   
   //! Determines the list of root entities from Model which are candidate for
   //! a transfer to a Shape (type of entities is PRODUCT)
   Standard_EXPORT virtual Standard_Integer NbRootsForTransfer() Standard_OVERRIDE;
   
   //! Returns sequence of all unit names for shape representations
   //! found in file
   Standard_EXPORT void FileUnits (TColStd_SequenceOfAsciiString& theUnitLengthNames, TColStd_SequenceOfAsciiString& theUnitAngleNames, TColStd_SequenceOfAsciiString& theUnitSolidAngleNames);
 
   //! Sets system length unit used by transfer process.
   //! Performs only if a model is not NULL
   Standard_EXPORT void SetSystemLengthUnit(const Standard_Real theLengthUnit);
 
   //! Returns system length unit used by transfer process.
   //! Performs only if a model is not NULL
   Standard_EXPORT Standard_Real SystemLengthUnit() const;
 
 
 protected:
 
 
 
 
 
 private:
 
   
   //! Returns  units for length , angle and solidangle for shape representations
   Standard_EXPORT Standard_Boolean findUnits (const Handle(StepRepr_RepresentationContext)& theReprContext, TColStd_Array1OfAsciiString& theNameUnits, TColStd_Array1OfReal& theFactorUnits);
 
 
 
 
 };
 
 
 
 
 
 
 
 #endif // _STEPControl_Reader_HeaderFile

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