Libosmium: include/osmium/experimental/flex_reader.hpp Source File

Libosmium Fast and flexible C++ library for working with OpenStreetMap data

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flex_reader.hpp
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1#ifndef OSMIUM_EXPERIMENTAL_FLEX_READER_HPP
2#define OSMIUM_EXPERIMENTAL_FLEX_READER_HPP
3
4/*
5
6This file is part of Osmium (https://osmcode.org/libosmium).
7
8Copyright 2013-2026 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
36#include <osmium/area/assembler.hpp>
37#include <osmium/area/multipolygon_collector.hpp>
38#include <osmium/handler/node_locations_for_ways.hpp> // IWYU pragma: keep
39#include <osmium/io/file.hpp>
40#include <osmium/io/header.hpp>
41#include <osmium/io/reader.hpp>
42#include <osmium/memory/buffer.hpp>
43#include <osmium/osm/entity_bits.hpp>
44#include <osmium/visitor.hpp>
45
46#include <string>
47#include <utility>
48#include <vector>
49
50namespace osmium {
51
55 namespace experimental {
56
57 template <typename TLocationHandler>
58 class FlexReader {
59
60 bool m_with_areas;
61 osmium::osm_entity_bits::type m_entities;
62
63 TLocationHandler& m_location_handler;
64
65 osmium::io::Reader m_reader;
66 osmium::area::Assembler::config_type m_assembler_config;
67 osmium::area::MultipolygonCollector<osmium::area::Assembler> m_collector;
68
69 public:
70
71 explicit FlexReader(const osmium::io::File& file, TLocationHandler& location_handler, osmium::osm_entity_bits::type entities = osmium::osm_entity_bits::nwr) :
72 m_with_areas((entities & osmium::osm_entity_bits::area) != 0),
73 m_entities((entities & ~osmium::osm_entity_bits::area) | (m_with_areas ? osmium::osm_entity_bits::node | osmium::osm_entity_bits::way : osmium::osm_entity_bits::nothing)),
74 m_location_handler(location_handler),
75 m_reader(file, m_entities),
76 m_collector(m_assembler_config)
77 {
78 m_location_handler.ignore_errors();
79 if (m_with_areas) {
80 osmium::io::Reader reader{file, osmium::osm_entity_bits::relation};
81 m_collector.read_relations(reader);
82 reader.close();
83 }
84 }
85
86 explicit FlexReader(const std::string& filename, TLocationHandler& location_handler, osmium::osm_entity_bits::type entities = osmium::osm_entity_bits::nwr) :
87 FlexReader(osmium::io::File{filename}, location_handler, entities) {
88 }
89
90 explicit FlexReader(const char* filename, TLocationHandler& location_handler, osmium::osm_entity_bits::type entities = osmium::osm_entity_bits::nwr) :
91 FlexReader(osmium::io::File{filename}, location_handler, entities) {
92 }
93
94 osmium::memory::Buffer read() {
95 osmium::memory::Buffer buffer = m_reader.read();
96
97 if (buffer) {
98 if (m_with_areas) {
99 std::vector<osmium::memory::Buffer> area_buffers;
100 osmium::apply(buffer, m_location_handler, m_collector.handler([&area_buffers](osmium::memory::Buffer&& area_buffer) {
101 area_buffers.push_back(std::move(area_buffer));
102 }));
103 for (const osmium::memory::Buffer& b : area_buffers) {
104 buffer.add_buffer(b);
105 buffer.commit();
106 }
107 } else if (m_entities & (osmium::osm_entity_bits::node | osmium::osm_entity_bits::way)) {
108 osmium::apply(buffer, m_location_handler);
109 }
110 }
111
112 return buffer;
113 }
114
115 osmium::io::Header header() {
116 return m_reader.header();
117 }
118
119 void close() {
120 m_reader.close();
121 }
122
123 bool eof() const {
124 return m_reader.eof();
125 }
126
127 const osmium::area::MultipolygonCollector<osmium::area::Assembler>& collector() const {
128 return m_collector;
129 }
130
131 }; // class FlexReader
132
133 } // namespace experimental
134
135} // namespace osmium
136
137#endif // OSMIUM_EXPERIMENTAL_FLEX_READER_HPP
assembler.hpp
buffer.hpp
osmium::area::MultipolygonCollector
Definition multipolygon_collector.hpp:77
osmium::experimental::FlexReader::m_with_areas
bool m_with_areas
Definition flex_reader.hpp:60
osmium::experimental::FlexReader::collector
const osmium::area::MultipolygonCollector< osmium::area::Assembler > & collector() const
Definition flex_reader.hpp:127
osmium::experimental::FlexReader::header
osmium::io::Header header()
Definition flex_reader.hpp:115
osmium::experimental::FlexReader::m_assembler_config
osmium::area::Assembler::config_type m_assembler_config
Definition flex_reader.hpp:66
osmium::experimental::FlexReader::read
osmium::memory::Buffer read()
Definition flex_reader.hpp:94
osmium::experimental::FlexReader::m_reader
osmium::io::Reader m_reader
Definition flex_reader.hpp:65
osmium::experimental::FlexReader::m_collector
osmium::area::MultipolygonCollector< osmium::area::Assembler > m_collector
Definition flex_reader.hpp:67
osmium::experimental::FlexReader::m_location_handler
TLocationHandler & m_location_handler
Definition flex_reader.hpp:63
osmium::experimental::FlexReader::close
void close()
Definition flex_reader.hpp:119
osmium::experimental::FlexReader::eof
bool eof() const
Definition flex_reader.hpp:123
osmium::experimental::FlexReader::FlexReader
FlexReader(const osmium::io::File &file, TLocationHandler &location_handler, osmium::osm_entity_bits::type entities=osmium::osm_entity_bits::nwr)
Definition flex_reader.hpp:71
osmium::experimental::FlexReader::FlexReader
FlexReader(const char *filename, TLocationHandler &location_handler, osmium::osm_entity_bits::type entities=osmium::osm_entity_bits::nwr)
Definition flex_reader.hpp:90
osmium::experimental::FlexReader::m_entities
osmium::osm_entity_bits::type m_entities
Definition flex_reader.hpp:61
osmium::experimental::FlexReader::FlexReader
FlexReader(const std::string &filename, TLocationHandler &location_handler, osmium::osm_entity_bits::type entities=osmium::osm_entity_bits::nwr)
Definition flex_reader.hpp:86
osmium::io::File
Definition file.hpp:72
osmium::io::Header
Definition header.hpp:68
osmium::io::Reader
Definition reader.hpp:90
osmium::io::Reader::close
void close()
Definition reader.hpp:384
entity_bits.hpp
header.hpp
file.hpp
multipolygon_collector.hpp
osmium::area
Code related to the building of areas (multipolygons) from relations.
Definition assembler.hpp:55
osmium::experimental
Experimental code that is not "officially" supported.
Definition flex_reader.hpp:55
osmium::io
Everything related to input and output of OSM data.
Definition bzip2_compression.hpp:86
osmium::osm_entity_bits
Bit field for OSM entity types.
Definition entity_bits.hpp:46
osmium::osm_entity_bits::type
type
Definition entity_bits.hpp:65
osmium::osm_entity_bits::node
@ node
Definition entity_bits.hpp:70
osmium::osm_entity_bits::nwr
@ nwr
node, way, or relation object
Definition entity_bits.hpp:76
osmium::osm_entity_bits::relation
@ relation
Definition entity_bits.hpp:73
osmium::osm_entity_bits::way
@ way
Definition entity_bits.hpp:71
osmium
Namespace for everything in the Osmium library.
Definition assembler.hpp:53
osmium::apply
void apply(TIterator it, TIterator end, THandlers &&... handlers)
Definition visitor.hpp:326
osmium::item_type::node
@ node
Definition item_type.hpp:48
osmium::item_type::way
@ way
Definition item_type.hpp:49
node_locations_for_ways.hpp
reader.hpp
visitor.hpp