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1 | -- Created on: 1992-11-18 |
2 | -- Created by: Christian CAILLET |
3 | -- Copyright (c) 1992-1999 Matra Datavision |
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4 | -- Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | -- |
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6 | -- This file is part of Open CASCADE Technology software library. |
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7 | -- |
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8 | -- This library is free software; you can redistribute it and/or modify it under |
9 | -- the terms of the GNU Lesser General Public License version 2.1 as published |
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10 | -- by the Free Software Foundation, with special exception defined in the file |
11 | -- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
12 | -- distribution for complete text of the license and disclaimer of any warranty. |
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13 | -- |
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14 | -- Alternatively, this file may be used under the terms of Open CASCADE |
15 | -- commercial license or contractual agreement. |
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16 | |
17 | class SelectRoots from IFSelect inherits SelectExtract |
18 | |
19 | ---Purpose : A SelectRoots sorts the Entities which are local roots of a |
20 | -- set of Entities (not shared by other Entities inside this set, |
21 | -- even if they are shared by other Entities outside it) |
22 | |
23 | uses AsciiString from TCollection, InterfaceModel, EntityIterator, Graph |
24 | |
25 | is |
26 | |
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27 | Create returns SelectRoots; |
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28 | ---Purpose : Creates a SelectRoots |
29 | |
30 | RootResult (me; G : Graph) returns EntityIterator is redefined; |
31 | ---Purpose : Returns the list of local roots. It is redefined for a purpose |
32 | -- of effeciency : calling a Sort routine for each Entity would |
33 | -- cost more ressource than to work in once using a Map |
34 | -- RootResult takes in account the Direct status |
35 | |
36 | HasUniqueResult (me) returns Boolean is redefined protected; |
37 | ---Purpose : Returns True, because RootResult assures uniqueness |
38 | |
39 | Sort (me; rank : Integer; ent : Transient; model : InterfaceModel) |
40 | returns Boolean; |
41 | ---Purpose : Returns always True, because RootResult has done work |
42 | |
43 | ExtractLabel (me) returns AsciiString from TCollection; |
44 | ---Purpose : Returns a text defining the criterium : "Local Root Entities" |
45 | |
46 | end SelectRoots; |