Libosmium  2.17.2
Fast and flexible C++ library for working with OpenStreetMap data
geos.hpp
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1 #ifndef OSMIUM_GEOM_GEOS_HPP
2 #define OSMIUM_GEOM_GEOS_HPP
3 
4 /*
5 
6 This file is part of Osmium (https://osmcode.org/libosmium).
7 
8 Copyright 2013-2021 Jochen Topf <jochen@topf.org> and others (see README).
9 
10 Boost Software License - Version 1.0 - August 17th, 2003
11 
12 Permission is hereby granted, free of charge, to any person or organization
13 obtaining a copy of the software and accompanying documentation covered by
14 this license (the "Software") to use, reproduce, display, distribute,
15 execute, and transmit the Software, and to prepare derivative works of the
16 Software, and to permit third-parties to whom the Software is furnished to
17 do so, all subject to the following:
18 
19 The copyright notices in the Software and this entire statement, including
20 the above license grant, this restriction and the following disclaimer,
21 must be included in all copies of the Software, in whole or in part, and
22 all derivative works of the Software, unless such copies or derivative
23 works are solely in the form of machine-executable object code generated by
24 a source language processor.
25 
26 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
29 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
30 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
31 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
32 DEALINGS IN THE SOFTWARE.
33 
34 */
35 
36 #include <geos/version.h>
37 #if defined(GEOS_VERSION_MAJOR) && defined(GEOS_VERSION_MINOR) && (GEOS_VERSION_MAJOR < 3 || (GEOS_VERSION_MAJOR == 3 && GEOS_VERSION_MINOR <= 5))
38 
39 #define OSMIUM_WITH_GEOS
40 
56 #include <osmium/geom/factory.hpp>
58 
59 #include <geos/geom/Coordinate.h>
60 #include <geos/geom/CoordinateSequence.h>
61 #include <geos/geom/CoordinateSequenceFactory.h>
62 #include <geos/geom/GeometryFactory.h>
63 #include <geos/geom/LinearRing.h>
64 #include <geos/geom/MultiPolygon.h>
65 #include <geos/geom/Point.h>
66 #include <geos/geom/Polygon.h>
67 #include <geos/geom/PrecisionModel.h>
68 #include <geos/util/GEOSException.h>
69 
70 #include <algorithm>
71 #include <cassert>
72 #include <cstddef>
73 #include <exception>
74 #include <iterator>
75 #include <memory>
76 #include <string>
77 #include <utility>
78 #include <vector>
79 
80 namespace osmium {
81 
82  struct geos_geometry_error : public geometry_error {
83 
84  explicit geos_geometry_error(const char* message) :
85  geometry_error(std::string{"geometry creation failed in GEOS library: "} + message) {
86  }
87 
88  }; // struct geos_geometry_error
89 
90  namespace geom {
91 
92  namespace detail {
93 
95  class GEOSFactoryImpl {
96 
97  std::unique_ptr<const geos::geom::PrecisionModel> m_precision_model;
98  std::unique_ptr<geos::geom::GeometryFactory> m_our_geos_factory;
99  geos::geom::GeometryFactory* m_geos_factory;
100 
101  std::unique_ptr<geos::geom::CoordinateSequence> m_coordinate_sequence;
102  std::vector<std::unique_ptr<geos::geom::LinearRing>> m_rings;
103  std::vector<std::unique_ptr<geos::geom::Polygon>> m_polygons;
104 
105  public:
106 
107  using point_type = std::unique_ptr<geos::geom::Point>;
108  using linestring_type = std::unique_ptr<geos::geom::LineString>;
109  using polygon_type = std::unique_ptr<geos::geom::Polygon>;
110  using multipolygon_type = std::unique_ptr<geos::geom::MultiPolygon>;
111  using ring_type = std::unique_ptr<geos::geom::LinearRing>;
112 
113  explicit GEOSFactoryImpl(int /* srid */, geos::geom::GeometryFactory& geos_factory) :
114  m_precision_model(nullptr),
115  m_our_geos_factory(nullptr),
116  m_geos_factory(&geos_factory) {
117  }
118 
123  OSMIUM_DEPRECATED explicit GEOSFactoryImpl(int /* srid */, int srid) :
124  m_precision_model(new geos::geom::PrecisionModel),
125  m_our_geos_factory(new geos::geom::GeometryFactory{m_precision_model.get(), srid}),
126  m_geos_factory(m_our_geos_factory.get()) {
127  }
128 
129  explicit GEOSFactoryImpl(int srid) :
130  m_precision_model(new geos::geom::PrecisionModel),
131  m_our_geos_factory(new geos::geom::GeometryFactory{m_precision_model.get(), srid}),
132  m_geos_factory(m_our_geos_factory.get()) {
133  }
134 
135  /* Point */
136 
137  point_type make_point(const osmium::geom::Coordinates& xy) const {
138  try {
139  return point_type{m_geos_factory->createPoint(geos::geom::Coordinate{xy.x, xy.y})};
140  } catch (const geos::util::GEOSException& e) {
141  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
142  }
143  }
144 
145  /* LineString */
146 
147  void linestring_start() {
148  try {
149  m_coordinate_sequence.reset(m_geos_factory->getCoordinateSequenceFactory()->create(static_cast<std::size_t>(0), 2));
150  } catch (const geos::util::GEOSException& e) {
151  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
152  }
153  }
154 
155  void linestring_add_location(const osmium::geom::Coordinates& xy) {
156  try {
157  m_coordinate_sequence->add(geos::geom::Coordinate{xy.x, xy.y});
158  } catch (const geos::util::GEOSException& e) {
159  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
160  }
161  }
162 
163  linestring_type linestring_finish(std::size_t /* num_points */) {
164  try {
165  return linestring_type{m_geos_factory->createLineString(m_coordinate_sequence.release())};
166  } catch (const geos::util::GEOSException& e) {
167  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
168  }
169  }
170 
171  /* MultiPolygon */
172 
173  void multipolygon_start() {
174  m_polygons.clear();
175  }
176 
177  void multipolygon_polygon_start() {
178  m_rings.clear();
179  }
180 
181  void multipolygon_polygon_finish() {
182  try {
183  assert(!m_rings.empty());
184  auto inner_rings = new std::vector<geos::geom::Geometry*>;
185  std::transform(std::next(m_rings.begin(), 1), m_rings.end(), std::back_inserter(*inner_rings), [](std::unique_ptr<geos::geom::LinearRing>& r) {
186  return r.release();
187  });
188  m_polygons.emplace_back(m_geos_factory->createPolygon(m_rings[0].release(), inner_rings));
189  m_rings.clear();
190  } catch (const geos::util::GEOSException& e) {
191  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
192  }
193  }
194 
195  void multipolygon_outer_ring_start() {
196  try {
197  m_coordinate_sequence.reset(m_geos_factory->getCoordinateSequenceFactory()->create(static_cast<std::size_t>(0), 2));
198  } catch (const geos::util::GEOSException& e) {
199  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
200  }
201  }
202 
203  void multipolygon_outer_ring_finish() {
204  try {
205  m_rings.emplace_back(m_geos_factory->createLinearRing(m_coordinate_sequence.release()));
206  } catch (const geos::util::GEOSException& e) {
207  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
208  }
209  }
210 
211  void multipolygon_inner_ring_start() {
212  try {
213  m_coordinate_sequence.reset(m_geos_factory->getCoordinateSequenceFactory()->create(static_cast<std::size_t>(0), 2));
214  } catch (const geos::util::GEOSException& e) {
215  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
216  }
217  }
218 
219  void multipolygon_inner_ring_finish() {
220  try {
221  m_rings.emplace_back(m_geos_factory->createLinearRing(m_coordinate_sequence.release()));
222  } catch (const geos::util::GEOSException& e) {
223  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
224  }
225  }
226 
227  void multipolygon_add_location(const osmium::geom::Coordinates& xy) {
228  try {
229  m_coordinate_sequence->add(geos::geom::Coordinate{xy.x, xy.y});
230  } catch (const geos::util::GEOSException& e) {
231  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
232  }
233  }
234 
235  multipolygon_type multipolygon_finish() {
236  try {
237  auto polygons = new std::vector<geos::geom::Geometry*>;
238  std::transform(m_polygons.begin(), m_polygons.end(), std::back_inserter(*polygons), [](std::unique_ptr<geos::geom::Polygon>& p) {
239  return p.release();
240  });
241  m_polygons.clear();
242  return multipolygon_type{m_geos_factory->createMultiPolygon(polygons)};
243  } catch (const geos::util::GEOSException& e) {
244  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
245  }
246  }
247 
248  }; // class GEOSFactoryImpl
249 
250  } // namespace detail
251 
253  template <typename TProjection = IdentityProjection>
254  using GEOSFactory = GeometryFactory<osmium::geom::detail::GEOSFactoryImpl, TProjection>;
255 
256  } // namespace geom
257 
258 } // namespace osmium
259 
260 #endif
261 
262 #endif // OSMIUM_GEOM_GEOS_HPP
#define OSMIUM_DEPRECATED
Definition: compatibility.hpp:51
Definition: attr.hpp:342
OSMIUM_DEPRECATED Coordinates transform(const CRS &src, const CRS &dest, Coordinates c)
Definition: projection.hpp:125
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
Definition: location.hpp:555
Definition: coordinates.hpp:48
double y
Definition: coordinates.hpp:51
double x
Definition: coordinates.hpp:50