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LinearComponentExtracter.h
1 /**********************************************************************
2 * $Id: LinearComponentExtracter.h 2772 2009-12-03 19:30:54Z mloskot $
3 *
4 * GEOS - Geometry Engine Open Source
5 * http://geos.refractions.net
6 *
7 * Copyright (C) 2001-2002 Vivid Solutions Inc.
8 * Copyright (C) 2006 Refractions Research Inc.
9 *
10 * This is free software; you can redistribute and/or modify it under
11 * the terms of the GNU Lesser General Public Licence as published
12 * by the Free Software Foundation.
13 * See the COPYING file for more information.
14 *
15 **********************************************************************/
16
17 #ifndef GEOS_GEOM_UTIL_LINEARCOMPONENTEXTRACTER_H
18 #define GEOS_GEOM_UTIL_LINEARCOMPONENTEXTRACTER_H
19
20
21 #include <geos/export.h>
22 #include <vector>
23
24 #include <geos/geom/GeometryComponentFilter.h>
25 #include <geos/geom/Geometry.h> // to be removed when we have the .inl
26 #include <geos/geom/LineString.h> // to be removed when we have the .inl
27 //#include <geos/platform.h>
28
29 namespace geos {
30 namespace geom { // geos.geom
31 namespace util { // geos.geom.util
32
36 class GEOS_DLL LinearComponentExtracter: public GeometryComponentFilter {
37
38 private:
39
40 LineString::ConstVect &comps;
41
42 // Declare type as noncopyable
43 LinearComponentExtracter(const LinearComponentExtracter& other);
44 LinearComponentExtracter& operator=(const LinearComponentExtracter& rhs);
45
46 public:
54 static void getLines(const Geometry &geom, std::vector<const LineString*> &ret)
55 {
56 LinearComponentExtracter lce(ret);
57 geom.apply_ro(&lce);
58 }
59
64 LinearComponentExtracter(std::vector<const LineString*> &newComps)
65 :
66 comps(newComps)
67 {}
68
69 void filter_rw(Geometry *geom)
70 {
71 if ( const LineString *ls=dynamic_cast<const LineString *>(geom) )
72 comps.push_back(ls);
73 }
74
75 void filter_ro(const Geometry *geom)
76 {
77 if ( const LineString *ls=dynamic_cast<const LineString *>(geom) )
78 comps.push_back(ls);
79 }
80
81 };
82
83 } // namespace geos.geom.util
84 } // namespace geos.geom
85 } // namespace geos
86
87 #endif
88
89 /**********************************************************************
90 * $Log$
91 * Revision 1.1 2006/03/09 16:46:49 strk
92 * geos::geom namespace definition, first pass at headers split
93 *
94 **********************************************************************/