Libosmium  2.15.2
Fast and flexible C++ library for working with OpenStreetMap data
multipolygon_manager.hpp
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1 #ifndef OSMIUM_AREA_MULTIPOLYGON_MANAGER_HPP
2 #define OSMIUM_AREA_MULTIPOLYGON_MANAGER_HPP
3 
4 /*
5 
6 This file is part of Osmium (https://osmcode.org/libosmium).
7 
8 Copyright 2013-2019 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 <osmium/area/stats.hpp>
37 #include <osmium/osm/item_type.hpp>
38 #include <osmium/osm/relation.hpp>
39 #include <osmium/osm/tag.hpp>
40 #include <osmium/osm/way.hpp>
46 #include <osmium/tags/taglist.hpp>
48 
49 #include <algorithm>
50 #include <cassert>
51 #include <cstddef>
52 #include <cstdint>
53 #include <cstring>
54 #include <vector>
55 
56 namespace osmium {
57 
61  namespace area {
62 
75  template <typename TAssembler>
76  class MultipolygonManager : public osmium::relations::RelationsManager<MultipolygonManager<TAssembler>, false, true, false> {
77 
78  using assembler_config_type = typename TAssembler::config_type;
80 
82 
84 
85  public:
86 
97  m_assembler_config(std::move(assembler_config)),
98  m_filter(std::move(filter)) {
99  }
100 
105  const area_stats& stats() const noexcept {
106  return m_stats;
107  }
108 
114  const char* type = relation.tags().get_value_by_key("type");
115 
116  // ignore relations without "type" tag
117  if (type == nullptr) {
118  return false;
119  }
120 
121  if (((!std::strcmp(type, "multipolygon")) || (!std::strcmp(type, "boundary"))) && osmium::tags::match_any_of(relation.tags(), m_filter)) {
122  return std::any_of(relation.members().cbegin(), relation.members().cend(), [](const RelationMember& member) {
123  return member.type() == osmium::item_type::way;
124  });
125  }
126 
127  return false;
128  }
129 
136  std::vector<const osmium::Way*> ways;
137  ways.reserve(relation.members().size());
138  for (const auto& member : relation.members()) {
139  if (member.ref() != 0) {
140  ways.push_back(this->get_member_way(member.ref()));
141  assert(ways.back() != nullptr);
142  }
143  }
144 
145  try {
146  TAssembler assembler{m_assembler_config};
147  assembler(relation, ways, this->buffer());
148  m_stats += assembler.stats();
149  } catch (const osmium::invalid_location&) {
150  // XXX ignore
151  }
152  }
153 
154  void after_way(const osmium::Way& way) {
155  // you need at least 4 nodes to make up a polygon
156  if (way.nodes().size() <= 3) {
157  return;
158  }
159 
160  try {
161  if (!way.nodes().front().location() || !way.nodes().back().location()) {
162  throw osmium::invalid_location{"invalid location"};
163  }
164  if (way.ends_have_same_location()) {
165  if (way.tags().has_tag("area", "no")) {
166  return;
167  }
168 
170  return;
171  }
172 
173  TAssembler assembler{m_assembler_config};
174  assembler(way, this->buffer());
175  m_stats += assembler.stats();
176  this->possibly_flush();
177  }
178  } catch (const osmium::invalid_location&) {
179  // XXX ignore
180  }
181  }
182 
183  }; // class MultipolygonManager
184 
185  } // namespace area
186 
187 } // namespace osmium
188 
189 #endif // OSMIUM_AREA_MULTIPOLYGON_MANAGER_HPP
void after_way(const osmium::Way &way)
Definition: multipolygon_manager.hpp:154
type
Definition: entity_bits.hpp:63
void way(const osmium::Way &) const noexcept
Definition: handler.hpp:81
osmium::memory::Buffer & buffer() noexcept
Access the output buffer.
Definition: relations_manager.hpp:255
Definition: relation.hpp:168
const assembler_config_type m_assembler_config
Definition: multipolygon_manager.hpp:79
Definition: entity_bits.hpp:72
Definition: way.hpp:72
MultipolygonManager(assembler_config_type assembler_config, osmium::TagsFilter filter=osmium::TagsFilter{true})
Definition: multipolygon_manager.hpp:96
osmium::TagsFilter m_filter
Definition: multipolygon_manager.hpp:83
const area_stats & stats() const noexcept
Definition: multipolygon_manager.hpp:105
Definition: relation.hpp:57
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
void relation(const osmium::Relation &relation)
Definition: relations_manager.hpp:484
area_stats m_stats
Definition: multipolygon_manager.hpp:81
Definition: location.hpp:53
bool match_any_of(const osmium::TagList &tag_list, const TFilter &filter)
Definition: taglist.hpp:50
Definition: stats.hpp:49
void possibly_flush()
Flush the output buffer if it is full.
Definition: relations_manager.hpp:270
const osmium::Way * get_member_way(osmium::object_id_type id) const noexcept
Definition: relations_manager.hpp:209
bool new_relation(const osmium::Relation &relation) const
Definition: multipolygon_manager.hpp:113
typename TAssembler::config_type assembler_config_type
Definition: multipolygon_manager.hpp:78
Definition: multipolygon_manager.hpp:76
Definition: relations_manager.hpp:301
bool match_none_of(const osmium::TagList &tag_list, const TFilter &filter)
Definition: taglist.hpp:60
void complete_relation(const osmium::Relation &relation)
Definition: multipolygon_manager.hpp:135