Libosmium  2.18.0
Fast and flexible C++ library for working with OpenStreetMap data
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rapid_geojson.hpp
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1#ifndef OSMIUM_GEOM_RAPID_GEOJSON_HPP
2#define OSMIUM_GEOM_RAPID_GEOJSON_HPP
3
4/*
5
6This file is part of Osmium (https://osmcode.org/libosmium).
7
8Copyright 2013-2022 Jochen Topf <jochen@topf.org> and others (see README).
9
10Boost Software License - Version 1.0 - August 17th, 2003
11
12Permission is hereby granted, free of charge, to any person or organization
13obtaining a copy of the software and accompanying documentation covered by
14this license (the "Software") to use, reproduce, display, distribute,
15execute, and transmit the Software, and to prepare derivative works of the
16Software, and to permit third-parties to whom the Software is furnished to
17do so, all subject to the following:
18
19The copyright notices in the Software and this entire statement, including
20the above license grant, this restriction and the following disclaimer,
21must be included in all copies of the Software, in whole or in part, and
22all derivative works of the Software, unless such copies or derivative
23works are solely in the form of machine-executable object code generated by
24a source language processor.
25
26THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
29SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
30FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
31ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
32DEALINGS IN THE SOFTWARE.
33
34*/
35
38
39#include <cstddef>
40
41namespace osmium {
42
43 namespace geom {
44
45 namespace detail {
46
51 template <typename TWriter>
52 class RapidGeoJSONFactoryImpl {
53
54 TWriter* m_writer;
55
56 public:
57
58 using point_type = void;
59 using linestring_type = void;
60 using polygon_type = void;
61 using multipolygon_type = void;
62 using ring_type = void;
63
64 RapidGeoJSONFactoryImpl(int /* srid */, TWriter& writer) :
65 m_writer(&writer) {
66 }
67
68 /* Point */
69
70 // { "type": "Point", "coordinates": [100.0, 0.0] }
71 point_type make_point(const osmium::geom::Coordinates& xy) const {
72 m_writer->String("geometry");
73 m_writer->StartObject();
74 m_writer->String("type");
75 m_writer->String("Point");
76 m_writer->String("coordinates");
77 m_writer->StartArray();
78 m_writer->Double(xy.x);
79 m_writer->Double(xy.y);
80 m_writer->EndArray();
81 m_writer->EndObject();
82 }
83
84 /* LineString */
85
86 // { "type": "LineString", "coordinates": [ [100.0, 0.0], [101.0, 1.0] ] }
87 void linestring_start() {
88 m_writer->String("geometry");
89 m_writer->StartObject();
90 m_writer->String("type");
91 m_writer->String("LineString");
92 m_writer->String("coordinates");
93 m_writer->StartArray();
94 }
95
96 void linestring_add_location(const osmium::geom::Coordinates& xy) {
97 m_writer->StartArray();
98 m_writer->Double(xy.x);
99 m_writer->Double(xy.y);
100 m_writer->EndArray();
101 }
102
103 linestring_type linestring_finish(size_t /* num_points */) {
104 m_writer->EndArray();
105 m_writer->EndObject();
106 }
107
108 /* Polygon */
109
110 // { "type": "Polygon", "coordinates": [[[100.0, 0.0], [101.0, 1.0]]] }
111 void polygon_start() {
112 m_writer->String("geometry");
113 m_writer->StartObject();
114 m_writer->String("type");
115 m_writer->String("Polygon");
116 m_writer->String("coordinates");
117 m_writer->StartArray();
118 m_writer->StartArray();
119 }
120
121 void polygon_add_location(const osmium::geom::Coordinates& xy) {
122 m_writer->StartArray();
123 m_writer->Double(xy.x);
124 m_writer->Double(xy.y);
125 m_writer->EndArray();
126 }
127
128 polygon_type polygon_finish(size_t /* num_points */) {
129 m_writer->EndArray();
130 m_writer->EndArray();
131 m_writer->EndObject();
132 }
133
134 /* MultiPolygon */
135
136 void multipolygon_start() {
137 m_writer->String("geometry");
138 m_writer->StartObject();
139 m_writer->String("type");
140 m_writer->String("MultiPolygon");
141 m_writer->String("coordinates");
142 m_writer->StartArray();
143 }
144
145 void multipolygon_polygon_start() {
146 m_writer->StartArray();
147 }
148
149 void multipolygon_polygon_finish() {
150 m_writer->EndArray();
151 }
152
153 void multipolygon_outer_ring_start() {
154 m_writer->StartArray();
155 }
156
157 void multipolygon_outer_ring_finish() {
158 m_writer->EndArray();
159 }
160
161 void multipolygon_inner_ring_start() {
162 m_writer->StartArray();
163 }
164
165 void multipolygon_inner_ring_finish() {
166 m_writer->EndArray();
167 }
168
169 void multipolygon_add_location(const osmium::geom::Coordinates& xy) {
170 m_writer->StartArray();
171 m_writer->Double(xy.x);
172 m_writer->Double(xy.y);
173 m_writer->EndArray();
174 }
175
176 multipolygon_type multipolygon_finish() {
177 m_writer->EndArray();
178 m_writer->EndObject();
179 }
180
181 }; // class RapidGeoJSONFactoryImpl
182
183 } // namespace detail
184
185 template <typename TWriter, typename TProjection = IdentityProjection>
187
188 } // namespace geom
189
190} // namespace osmium
191
192#endif // OSMIUM_GEOM_RAPID_GEOJSON_HPP
Definition: factory.hpp:149
Definition: attr.hpp:342
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
Definition: coordinates.hpp:48
double y
Definition: coordinates.hpp:51
double x
Definition: coordinates.hpp:50