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