include/opencascade/Expr_SystemRelation.hxx

0001 // Created on: 1991-01-14
0002 // Created by: Arnaud BOUZY
0003 // Copyright (c) 1991-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _Expr_SystemRelation_HeaderFile
0018 #define _Expr_SystemRelation_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_Type.hxx>
0022
0023 #include <Expr_SequenceOfGeneralRelation.hxx>
0024 #include <Expr_GeneralRelation.hxx>
0025 #include <Standard_Integer.hxx>
0026 class Expr_GeneralExpression;
0027 class Expr_NamedUnknown;
0028 class TCollection_AsciiString;
0029
0030 class Expr_SystemRelation;
0031 DEFINE_STANDARD_HANDLE(Expr_SystemRelation, Expr_GeneralRelation)
0032
0033 class Expr_SystemRelation : public Expr_GeneralRelation
0034 {
0035
0036 public:
0037   //! Creates a system with one relation
0038   Standard_EXPORT Expr_SystemRelation(const Handle(Expr_GeneralRelation)& relation);
0039
0040   //! Appends <relation> in the list of components of <me>.
0041   Standard_EXPORT void Add(const Handle(Expr_GeneralRelation)& relation);
0042
0043   Standard_EXPORT void Remove(const Handle(Expr_GeneralRelation)& relation);
0044
0045   //! Tests if <me> is linear between its NamedUnknowns.
0046   Standard_EXPORT Standard_Boolean IsLinear() const Standard_OVERRIDE;
0047
0048   //! Returns the number of relations contained in <me>.
0049   Standard_EXPORT Standard_Integer NbOfSubRelations() const Standard_OVERRIDE;
0050
0051   //! Returns the number of SingleRelations contained in
0052   //! <me>.
0053   Standard_EXPORT Standard_Integer NbOfSingleRelations() const Standard_OVERRIDE;
0054
0055   //! Returns the relation denoted by <index> in <me>.
0056   //! An exception is raised if <index> is out of range.
0057   Standard_EXPORT Handle(Expr_GeneralRelation) SubRelation(const Standard_Integer index) const
0058     Standard_OVERRIDE;
0059
0060   Standard_EXPORT Standard_Boolean IsSatisfied() const Standard_OVERRIDE;
0061
0062   //! Returns a GeneralRelation after replacement of
0063   //! NamedUnknowns by an associated expression, and after
0064   //! values computation.
0065   Standard_EXPORT Handle(Expr_GeneralRelation) Simplified() const Standard_OVERRIDE;
0066
0067   //! Replaces NamedUnknowns by associated expressions,
0068   //! and computes values in <me>.
0069   Standard_EXPORT void Simplify() Standard_OVERRIDE;
0070
0071   //! Returns a copy of <me> having the same unknowns and functions.
0072   Standard_EXPORT Handle(Expr_GeneralRelation) Copy() const Standard_OVERRIDE;
0073
0074   //! Tests if <me> contains <exp>.
0075   Standard_EXPORT Standard_Boolean
0076     Contains(const Handle(Expr_GeneralExpression)& exp) const Standard_OVERRIDE;
0077
0078   //! Replaces all occurrences of <var> with <with> in <me>.
0079   Standard_EXPORT void Replace(const Handle(Expr_NamedUnknown)&      var,
0080                                const Handle(Expr_GeneralExpression)& with) Standard_OVERRIDE;
0081
0082   //! returns a string representing <me> in a readable way.
0083   Standard_EXPORT TCollection_AsciiString String() const Standard_OVERRIDE;
0084
0085   DEFINE_STANDARD_RTTIEXT(Expr_SystemRelation, Expr_GeneralRelation)
0086
0087 protected:
0088 private:
0089   Expr_SequenceOfGeneralRelation myRelations;
0090 };
0091
0092 #endif // _Expr_SystemRelation_HeaderFile