/src/geos/include/geos/index/chain/MonotoneChainSelectAction.h
Line | Count | Source |
1 | | /********************************************************************** |
2 | | * |
3 | | * GEOS - Geometry Engine Open Source |
4 | | * http://geos.osgeo.org |
5 | | * |
6 | | * Copyright (C) 2001-2002 Vivid Solutions Inc. |
7 | | * |
8 | | * This is free software; you can redistribute and/or modify it under |
9 | | * the terms of the GNU Lesser General Public Licence as published |
10 | | * by the Free Software Foundation. |
11 | | * See the COPYING file for more information. |
12 | | * |
13 | | ********************************************************************** |
14 | | * |
15 | | * Last port: index/chain/MonotoneChainSelectAction.java rev. 1.6 (JTS-1.10) |
16 | | * |
17 | | **********************************************************************/ |
18 | | |
19 | | #pragma once |
20 | | |
21 | | #include <geos/export.h> |
22 | | #include <geos/geom/LineSegment.h> // composition |
23 | | #include <geos/geom/Envelope.h> // composition |
24 | | |
25 | | |
26 | | // Forward declarations |
27 | | namespace geos { |
28 | | namespace index { |
29 | | namespace chain { |
30 | | class MonotoneChain; |
31 | | } |
32 | | } |
33 | | } |
34 | | |
35 | | namespace geos { |
36 | | namespace index { // geos::index |
37 | | namespace chain { // geos::index::chain |
38 | | |
39 | | /** |
40 | | * The action for the internal iterator for performing |
41 | | * Envelope select queries on a MonotoneChain |
42 | | * |
43 | | */ |
44 | | class GEOS_DLL MonotoneChainSelectAction { |
45 | | |
46 | | protected: |
47 | | |
48 | | geom::LineSegment selectedSegment; |
49 | | |
50 | | public: |
51 | | |
52 | 412k | MonotoneChainSelectAction() {} |
53 | | |
54 | | virtual |
55 | 412k | ~MonotoneChainSelectAction() {} |
56 | | |
57 | | /// This function can be overridden if the original chain is needed |
58 | | virtual void select(const MonotoneChain& mc, std::size_t start); |
59 | | |
60 | | /** |
61 | | * This is a convenience function which can be overridden |
62 | | * to obtain the actual line segment which is selected |
63 | | * |
64 | | * @param seg |
65 | | */ |
66 | | virtual void select(const geom::LineSegment& seg) = 0; |
67 | | |
68 | | }; |
69 | | |
70 | | |
71 | | } // namespace geos::index::chain |
72 | | } // namespace geos::index |
73 | | } // namespace geos |
74 | | |