src/IFSelect/IFSelect_SelectIntersection.cdl


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

-- File:	SelectIntersection.cdl
-- Created:	Mon Jan 11 12:40:26 1993
-- Author:	Christian CAILLET
--		<cky@sdsun1>
---Copyright:	 Matra Datavision 1993


class SelectIntersection  from IFSelect  inherits SelectCombine

    ---Purpose : A SelectIntersection filters the Entities issued from several
    --           other Selections as Intersection of results : "AND" operator

uses AsciiString from TCollection, EntityIterator, Graph

is

    Create returns mutable SelectIntersection;
    ---Purpose : Creates an empty SelectIntersection

    RootResult (me; G : Graph) returns EntityIterator;
    ---Purpose : Returns the list of selected Entities, which is the common part
    --           of results from all input selections. Uniqueness is guaranteed.

    Label (me) returns AsciiString from TCollection;
    ---Purpose : Returns a text defining the criterium : "Intersection (AND)"

end SelectIntersection;