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 // Created on: 1993-02-02
 // 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 _Interface_Protocol_HeaderFile
 #define _Interface_Protocol_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_Type.hxx>
 
 #include <Standard_Transient.hxx>
 #include <Standard_Integer.hxx>
 class Interface_Graph;
 class Interface_Check;
 class Interface_InterfaceModel;
 
 
 class Interface_Protocol;
 DEFINE_STANDARD_HANDLE(Interface_Protocol, Standard_Transient)
 
 //! General description of Interface Protocols. A Protocol defines
 //! a set of Entity types. This class provides also the notion of
 //! Active Protocol, as a working context, defined once then
 //! exploited by various Tools and Libraries.
 //!
 //! It also gives control of type definitions. By default, types
 //! are provided by CDL, but specific implementations, or topics
 //! like multi-typing, may involve another way
 class Interface_Protocol : public Standard_Transient
 {
 
 public:
 
   
   //! Returns the Active Protocol, if defined (else, returns a
   //! Null Handle, which means "no defined active protocol")
   Standard_EXPORT static Handle(Interface_Protocol) Active();
   
   //! Sets a given Protocol to be the Active one (for the users of
   //! Active, see just above). Applies to every sub-type of Protocol
   Standard_EXPORT static void SetActive (const Handle(Interface_Protocol)& aprotocol);
   
   //! Erases the Active Protocol (hence it becomes undefined)
   Standard_EXPORT static void ClearActive();
   
   //! Returns count of Protocol used as Resources (level one)
   Standard_EXPORT virtual Standard_Integer NbResources() const = 0;
   
   //! Returns a Resource, given its rank (between 1 and NbResources)
   Standard_EXPORT virtual Handle(Interface_Protocol) Resource (const Standard_Integer num) const = 0;
   
   //! Returns a unique positive CaseNumber for each Recognized
   //! Object. By default, recognition is based on Type(1)
   //! By default, calls the following one which is deferred.
   Standard_EXPORT virtual Standard_Integer CaseNumber (const Handle(Standard_Transient)& obj) const;
   
   //! Returns True if type of <obj> is that defined from CDL
   //! This is the default but it may change according implementation
   Standard_EXPORT virtual Standard_Boolean IsDynamicType (const Handle(Standard_Transient)& obj) const;
   
   //! Returns the count of DISTINCT types under which an entity may
   //! be processed. Each one is candidate to be recognized by
   //! TypeNumber, <obj> is then processed according it
   //! By default, returns 1 (the DynamicType)
   Standard_EXPORT virtual Standard_Integer NbTypes (const Handle(Standard_Transient)& obj) const;
   
   //! Returns a type under which <obj> can be recognized and
   //! processed, according its rank in its definition list (see
   //! NbTypes).
   //! By default, returns DynamicType
   Standard_EXPORT Handle(Standard_Type) Type (const Handle(Standard_Transient)& obj, const Standard_Integer nt = 1) const;
   
   //! Returns a unique positive CaseNumber for each Recognized Type,
   //! Returns Zero for "<type> not recognized"
   Standard_EXPORT virtual Standard_Integer TypeNumber (const Handle(Standard_Type)& atype) const = 0;
   
   //! Evaluates a Global Check for a model (with its Graph)
   //! Returns True when done, False if data in model do not apply
   //!
   //! Very specific of each norm, i.e. of each protocol : the
   //! uppest level Protocol assumes it, it can call GlobalCheck of
   //! its resources only if it is necessary
   //!
   //! Default does nothing, can be redefined
   Standard_EXPORT virtual Standard_Boolean GlobalCheck (const Interface_Graph& G, Handle(Interface_Check)& ach) const;
   
   //! Creates an empty Model of the considered Norm
   Standard_EXPORT virtual Handle(Interface_InterfaceModel) NewModel() const = 0;
   
   //! Returns True if <model> is a Model of the considered Norm
   Standard_EXPORT virtual Standard_Boolean IsSuitableModel (const Handle(Interface_InterfaceModel)& model) const = 0;
   
   //! Creates a new Unknown Entity for the considered Norm
   Standard_EXPORT virtual Handle(Standard_Transient) UnknownEntity() const = 0;
   
   //! Returns True if <ent> is an Unknown Entity for the Norm, i.e.
   //! same Type as them created by method UnknownEntity
   //! (for an Entity out of the Norm, answer can be unpredicable)
   Standard_EXPORT virtual Standard_Boolean IsUnknownEntity (const Handle(Standard_Transient)& ent) const = 0;
 
 
 
 
   DEFINE_STANDARD_RTTIEXT(Interface_Protocol,Standard_Transient)
 
 protected:
 
 
 
 
 private:
 
 
 
 
 };
 
 
 
 
 
 
 
 #endif // _Interface_Protocol_HeaderFile

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