blob: 1a11fb99c1cc7e9ac193c9a82b02d7426f947f64 (
plain)
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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
-- File: SelectRootComps.cdl
-- Created: Wed Dec 2 14:50:51 1992
-- Author: Christian CAILLET
-- <cky@sdsun1>
---Copyright: Matra Datavision 1992
class SelectRootComps from IFSelect inherits SelectExtract
---Purpose : A SelectRootComps sorts the Entities which are part of Strong
-- Componants, local roots of a set of Entities : they can be
-- Single Componants (containing one Entity) or Cycles
-- This class gives a more secure result than SelectRoots (which
-- considers only Single Componants) but is longer to work : it
-- can be used when there can be or there are cycles in a Model
-- For each cycle, one Entity is given arbitrarily
-- Reject works as for SelectRoots : Strong Componants defined in
-- the input list which are not local roots are given
uses AsciiString from TCollection, InterfaceModel, EntityIterator, Graph
is
Create returns mutable SelectRootComps;
---Purpose : Creates a SelectRootComps
RootResult (me; G : Graph) returns EntityIterator is redefined;
---Purpose : Returns the list of local root strong componants, by one
-- Entity par componant. It is redefined for a purpose of
-- effeciency : calling a Sort routine for each Entity would
-- cost more ressource than to work in once using a Map
-- RootResult takes in account the Direct status
HasUniqueResult (me) returns Boolean is redefined protected;
---Purpose : Returns True, RootResult assuring uniqueness
Sort (me; rank : Integer; ent : Transient; model : InterfaceModel)
returns Boolean;
---Purpose : Returns always True, because RootResult has done work
ExtractLabel (me) returns AsciiString from TCollection;
---Purpose : Returns a text defining the criterium : "Local Root Componants"
end SelectRootComps;
|
