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 // Created on: 1994-10-03
 // Created by: Christian CAILLET
 // Copyright (c) 1994-1999 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 _TransferBRep_Reader_HeaderFile
 #define _TransferBRep_Reader_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <Standard_Integer.hxx>
 #include <TopTools_HSequenceOfShape.hxx>
 #include <TColStd_HSequenceOfTransient.hxx>
 #include <Message_ProgressRange.hxx>
 
 class Interface_Protocol;
 class Transfer_ActorOfTransientProcess;
 class Interface_InterfaceModel;
 class Transfer_TransientProcess;
 class Interface_CheckIterator;
 class TopoDS_Shape;
 class Standard_Transient;
 
 //! This class offers a simple, easy to call, way of transferring
 //! data from interface files to Shapes from CasCade
 //! It must be specialized according to each norm/protocol, by :
 //! - defining how to read a file (specific method with protocol)
 //! - definig transfer, by providing an Actor
 class TransferBRep_Reader 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! Initializes a non-specialised Reader. Typically, for each norm
   //! or protocol, is will be required to define a specific Create
   //! to load a file and transfer it
   Standard_EXPORT TransferBRep_Reader();
   
   //! Records the protocol to be used for read and transfer roots
   Standard_EXPORT void SetProtocol (const Handle(Interface_Protocol)& protocol);
   
   //! Returns the recorded Protocol
   Standard_EXPORT virtual Handle(Interface_Protocol) Protocol() const;
   
   //! Records the actor to be used for transfers
   Standard_EXPORT void SetActor (const Handle(Transfer_ActorOfTransientProcess)& actor);
   
   //! Returns the recorded Actor
   Standard_EXPORT virtual Handle(Transfer_ActorOfTransientProcess) Actor() const;
   
   //! Sets File Status to be interpreted as follows :
   //! = 0 OK
   //! < 0 file not found
   //! > 0 read error, no Model could be created
   Standard_EXPORT void SetFileStatus (const Standard_Integer status);
   
   //! Returns the File Status
   Standard_EXPORT Standard_Integer FileStatus() const;
   
   //! Returns True if FileStatus is for FileNotFound
   Standard_EXPORT Standard_Boolean FileNotFound() const;
   
   //! Returns True if FileStatus is for Error during read
   //! (major error; for local error, see CheckModel)
   Standard_EXPORT Standard_Boolean SyntaxError() const;
   
   //! Specifies a Model to work on
   //! Also clears the result and Done status
   Standard_EXPORT void SetModel (const Handle(Interface_InterfaceModel)& model);
   
   //! Returns the Model to be worked on
   Standard_EXPORT Handle(Interface_InterfaceModel) Model() const;
   
   //! clears the result and Done status. But not the Model.
   Standard_EXPORT void Clear();
   
   //! Checks the Model. Returns True if there is NO FAIL at all
   //! (regardless Warnings)
   //! If <withprint> is True, also sends Checks on standard output
   Standard_EXPORT Standard_Boolean CheckStatusModel (const Standard_Boolean withprint) const;
   
   //! Checks the Model (complete : syntax + semantic) and returns
   //! the produced Check List
   Standard_EXPORT Interface_CheckIterator CheckListModel() const;
   
   //! Returns (by Reference, hence can be changed) the Mode for new
   //! Transfer : True (D) means that each new Transfer produces a
   //! new TransferProcess. Else keeps the original one but each
   //! Transfer clears its (former results are not kept)
   Standard_EXPORT Standard_Boolean& ModeNewTransfer();
   
   //! Initializes the Reader for a Transfer (one,roots, or list)
   //! Also calls PrepareTransfer
   //! Returns True when done, False if could not be done
   Standard_EXPORT Standard_Boolean BeginTransfer();
   
   //! Ebds a Transfer (one, roots or list) by recording its result
   Standard_EXPORT void EndTransfer();
   
   //! Prepares the Transfer. Also can act on the Actor or change the
   //! TransientProcess if required.
   //! Should not set the Actor into the TransientProcess, it is done
   //! by caller. The provided default does nothing.
   Standard_EXPORT virtual void PrepareTransfer();
   
   //! Transfers all Root Entities which are recognized as Geom-Topol
   //! The result will be a list of Shapes.
   //! This method calls user redefinable PrepareTransfer
   //! Remark : former result is cleared
   Standard_EXPORT virtual void TransferRoots(const Message_ProgressRange& theProgress = Message_ProgressRange());
   
   //! Transfers an Entity given its rank in the Model (Root or not)
   //! Returns True if it is recognized as Geom-Topol.
   //! (But it can have failed : see IsDone)
   Standard_EXPORT virtual Standard_Boolean Transfer (const Standard_Integer num,
                                                      const Message_ProgressRange& theProgress = Message_ProgressRange());
   
   //! Transfers a list of Entities (only the ones also in the Model)
   //! Remark : former result is cleared
   Standard_EXPORT virtual void TransferList (const Handle(TColStd_HSequenceOfTransient)& list,
                                              const Message_ProgressRange& theProgress = Message_ProgressRange());
   
   //! Returns True if the LAST Transfer/TransferRoots was a success
   Standard_EXPORT Standard_Boolean IsDone() const;
   
   //! Returns the count of produced Shapes (roots)
   Standard_EXPORT Standard_Integer NbShapes() const;
   
   //! Returns the complete list of produced Shapes
   Standard_EXPORT Handle(TopTools_HSequenceOfShape) Shapes() const;
   
   //! Returns a Shape given its rank, by default the first one
   Standard_EXPORT const TopoDS_Shape& Shape (const Standard_Integer num = 1) const;
   
   //! Returns a Shape produced from a given entity (if it was
   //! individually transferred or if an intermediate result is
   //! known). If no Shape is bound with <ent>, returns a Null Shape
   //! Warning : Runs on the last call to Transfer,TransferRoots,TransferList
   Standard_EXPORT TopoDS_Shape ShapeResult (const Handle(Standard_Transient)& ent) const;
   
   //! Returns a unique Shape for the result :
   //! - a void Shape (type = SHAPE) if result is empty
   //! - a simple Shape if result has only one : returns this one
   //! - a Compound if result has more than one Shape
   Standard_EXPORT TopoDS_Shape OneShape() const;
   
   //! Returns the count of produced Transient Results (roots)
   Standard_EXPORT Standard_Integer NbTransients() const;
   
   //! Returns the complete list of produced Transient Results
   Standard_EXPORT Handle(TColStd_HSequenceOfTransient) Transients() const;
   
   //! Returns a Transient Root Result, given its rank (by default
   //! the first one)
   Standard_EXPORT Handle(Standard_Transient) Transient (const Standard_Integer num = 1) const;
   
   //! Checks the Result of last Transfer (individual or roots, no
   //! cumulation on several transfers). Returns True if NO fail
   //! occurred during Transfer (queries the TransientProcess)
   Standard_EXPORT Standard_Boolean CheckStatusResult (const Standard_Boolean withprints) const;
   
   //! Checks the Result of last Transfer (individual or roots, no
   //! cumulation on several transfers) and returns the produced list
   Standard_EXPORT Interface_CheckIterator CheckListResult() const;
   
   //! Returns the TransientProcess. It records information about
   //! the very last transfer done. Null if no transfer yet done.
   //! Can be used for queries more accurate than the default ones.
   Standard_EXPORT Handle(Transfer_TransientProcess) TransientProcess() const;
   
   Standard_EXPORT virtual ~TransferBRep_Reader();
 
 protected:
 
 
 
   Standard_Boolean theDone;
   Handle(Transfer_TransientProcess) theProc;
 
 
 private:
 
 
 
   Handle(Interface_Protocol) theProto;
   Handle(Transfer_ActorOfTransientProcess) theActor;
   Handle(Interface_InterfaceModel) theModel;
   Standard_Integer theFilest;
   Standard_Boolean theNewpr;
   Handle(TopTools_HSequenceOfShape) theShapes;
   Handle(TColStd_HSequenceOfTransient) theTransi;
 
 
 };
 
 
 
 
 
 
 
 #endif // _TransferBRep_Reader_HeaderFile

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