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 // Created on: 1992-12-09
 // Created by: Christian CAILLET
 // Copyright (c) 1992-1999 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 _IFSelect_SelectAnyList_HeaderFile
 #define _IFSelect_SelectAnyList_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_Type.hxx>
 
 #include <IFSelect_SelectDeduct.hxx>
 #include <Standard_Integer.hxx>
 class IFSelect_IntParam;
 class Interface_EntityIterator;
 class Standard_Transient;
 class Interface_Graph;
 class TCollection_AsciiString;
 
 
 class IFSelect_SelectAnyList;
 DEFINE_STANDARD_HANDLE(IFSelect_SelectAnyList, IFSelect_SelectDeduct)
 
 //! A SelectAnyList kind Selection selects a List of an Entity, as
 //! well as this Entity contains some. A List contains sub-entities
 //! as one per Item, or several (for instance if an Entity binds
 //! couples of sub-entities, each item is one of these couples).
 //! Remark that only Entities are taken into account (neither
 //! Reals, nor Strings, etc...)
 //!
 //! To define the list on which to work, SelectAnyList has two
 //! deferred methods : NbItems (which gives the length of the
 //! list), FillResult (which fills an EntityIterator). They are
 //! intended to get a List in an Entity of the required Type (and
 //! consider that list is empty if Entity has not required Type)
 //!
 //! In addition, remark that some types of Entity define more than
 //! one list in each instance : a given sub-class of SelectAnyList
 //! must be attached to one list
 //!
 //! SelectAnyList keeps or rejects a sub-set of the list,
 //! that is the Items of which rank in the list is in a given
 //! range (for instance form 2nd to 6th, etc...)
 //! Range is defined by two Integer values. In order to allow
 //! external control of them, these values are not directly
 //! defined as fields, but accessed through IntParams, that is,
 //! referenced as Transient (Handle) objects
 //!
 //! Warning : the Input can be any kind of Selection, BUT its
 //! RootResult must have zero (empty) or one Entity maximum
 class IFSelect_SelectAnyList : public IFSelect_SelectDeduct
 {
 
 public:
 
   
   //! Keeps Input Entity, as having required type. It works by
   //! keeping in <iter>, only suitable Entities (SelectType can be
   //! used). Called by RootResult (which waits for ONE ENTITY MAX)
   Standard_EXPORT virtual void KeepInputEntity (Interface_EntityIterator& iter) const = 0;
   
   //! Returns count of Items in the list in the Entity <ent>
   //! If <ent> has not required type, returned value must be Zero
   Standard_EXPORT virtual Standard_Integer NbItems (const Handle(Standard_Transient)& ent) const = 0;
   
   //! Sets a Range for numbers, with a lower and a upper limits
   Standard_EXPORT void SetRange (const Handle(IFSelect_IntParam)& rankfrom, const Handle(IFSelect_IntParam)& rankto);
   
   //! Sets a unique number (only one Entity will be sorted as True)
   Standard_EXPORT void SetOne (const Handle(IFSelect_IntParam)& rank);
   
   //! Sets a Lower limit but no upper limit
   Standard_EXPORT void SetFrom (const Handle(IFSelect_IntParam)& rankfrom);
   
   //! Sets an Upper limit but no lower limit (equivalent to lower 1)
   Standard_EXPORT void SetUntil (const Handle(IFSelect_IntParam)& rankto);
   
   //! Returns True if a Lower limit is defined
   Standard_EXPORT Standard_Boolean HasLower() const;
   
   //! Returns Lower limit (if there is; else, value is senseless)
   Standard_EXPORT Handle(IFSelect_IntParam) Lower() const;
   
   //! Returns Integer Value of Lower Limit (0 if none)
   Standard_EXPORT Standard_Integer LowerValue() const;
   
   //! Returns True if a Lower limit is defined
   Standard_EXPORT Standard_Boolean HasUpper() const;
   
   //! Returns Upper limit (if there is; else, value is senseless)
   Standard_EXPORT Handle(IFSelect_IntParam) Upper() const;
   
   //! Returns Integer Value of Upper Limit (0 if none)
   Standard_EXPORT Standard_Integer UpperValue() const;
   
   //! Returns the list of selected entities (list of entities
   //! complying with rank criterium)
   //! Error if the input list has more than one Item
   Standard_EXPORT Interface_EntityIterator RootResult (const Interface_Graph& G) const Standard_OVERRIDE;
   
   //! Puts into <res>, the sub-entities of the list, from n1 to
   //! n2 included. Remark that adequation with Entity's type and
   //! length of list has already been made at this stage
   //! Called by RootResult
   Standard_EXPORT virtual void FillResult (const Standard_Integer n1, const Standard_Integer n2, const Handle(Standard_Transient)& ent, Interface_EntityIterator& res) const = 0;
   
   //! Returns a text defining the criterium : "Components of List "
   //! then Specific List Label, then, following cases :
   //! " From .. Until .." or "From .." or "Until .." or "Rank no .."
   //! Specific type is given by deferred method ListLabel
   Standard_EXPORT TCollection_AsciiString Label() const Standard_OVERRIDE;
   
   //! Returns the specific label for the list, which is included as
   //! a part of Label
   Standard_EXPORT virtual TCollection_AsciiString ListLabel() const = 0;
 
 
 
 
   DEFINE_STANDARD_RTTIEXT(IFSelect_SelectAnyList,IFSelect_SelectDeduct)
 
 protected:
 
 
 
 
 private:
 
 
   Handle(IFSelect_IntParam) thelower;
   Handle(IFSelect_IntParam) theupper;
 
 
 };
 
 
 
 
 
 
 
 #endif // _IFSelect_SelectAnyList_HeaderFile

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