-- Created on: 1993-01-07
-- 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.

deferred class SelectInList  from IFSelect  inherits SelectAnyList

    ---Purpose : A SelectInList kind Selection selects a List of an Entity,
    --           which is composed of single Entities
    --           To know the list on which to work, SelectInList has two
    --           deferred methods : NbItems (inherited from SelectAnyList) and
    --           ListedEntity (which gives an item as an Entity) which must be
    --           defined to get a List in an Entity of the required Type (and
    --           consider that list is empty if Entity has not required Type)
    --           
    --           As for SelectAnyList, if a type of Entity defines several
    --           lists, a given sub-class of SelectInList is attached on one

uses AsciiString from TCollection, Transient, EntityIterator, Graph, IntParam

raises OutOfRange

is

--    NbItems (me; ent : Transient) returns Integer  is deferred;
--    KeepInputEntity (me; iter : in out EntityIterator) is deferred; 
--    these method are inherited as deferred and remain to be defined

    ListedEntity (me; num : Integer; ent : Transient)
    	returns Transient  raises OutOfRange  is deferred;
    ---Purpose : Returns an Entity, given its rank in the list

    FillResult (me; n1,n2 : Integer; ent : Transient;
    	result : in out EntityIterator);
    ---Purpose : Puts into the result, 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; calls ListedEntity (see below)

end SelectInList;