Libosmium 2.22.0 Fast and flexible C++ library for working with OpenStreetMap data

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tags_filter.hpp
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1#ifndef OSMIUM_TAGS_TAGS_FILTER_HPP
2#define OSMIUM_TAGS_TAGS_FILTER_HPP
3
4/*
5
6 This file is part of Osmium (https://osmcode.org/libosmium).
7
8 Copyright 2013-2025 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/osm/tag.hpp>
37#include <osmium/tags/matcher.hpp>
38
39#include <utility>
40#include <vector>
41
42 namespace osmium {
43
65 template <typename TResult>
66 class TagsFilterBase {
67
68 std::vector<std::pair<TResult, TagMatcher>> m_rules;
69 TResult m_default_result;
70
71 public:
72
73 using iterator = osmium::memory::CollectionFilterIterator<TagsFilterBase, const osmium::Tag>;
74
81 explicit TagsFilterBase(const TResult default_result = TResult{}) :
82 m_default_result(default_result) {
83 }
84
89 void set_default_result(const TResult default_result) noexcept {
90 m_default_result = default_result;
91 }
92
100 TagsFilterBase& add_rule(const TResult result, const TagMatcher& matcher) {
101 m_rules.emplace_back(result, matcher);
102 return *this;
103 }
104
113 template <typename... TArgs>
114 TagsFilterBase& add_rule(const TResult result, TArgs&&... args) {
115 m_rules.emplace_back(result, osmium::TagMatcher{std::forward<TArgs>(args)...});
116 return *this;
117 }
118
126 TResult operator()(const osmium::Tag& tag) const noexcept {
127 for (const auto& rule : m_rules) {
128 if (rule.second(tag)) {
129 return rule.first;
130 }
131 }
132 return m_default_result;
133 }
134
140 std::size_t count() const noexcept {
141 return m_rules.size();
142 }
143
149 bool empty() const noexcept {
150 return m_rules.empty();
151 }
152
153 }; // class TagsFilterBase
154
155 using TagsFilter = TagsFilterBase<bool>;
156
157} // namespace osmium
158
159
160#endif // OSMIUM_TAGS_TAGS_FILTER_HPP
osmium::TagMatcher
Definition matcher.hpp:48
osmium::Tag
Definition tag.hpp:48
osmium::TagsFilterBase
Definition tags_filter.hpp:66
osmium::TagsFilterBase::add_rule
TagsFilterBase & add_rule(const TResult result, TArgs &&... args)
Definition tags_filter.hpp:114
osmium::TagsFilterBase::m_default_result
TResult m_default_result
Definition tags_filter.hpp:69
osmium::TagsFilterBase::count
std::size_t count() const noexcept
Definition tags_filter.hpp:140
osmium::TagsFilterBase::empty
bool empty() const noexcept
Definition tags_filter.hpp:149
osmium::TagsFilterBase::set_default_result
void set_default_result(const TResult default_result) noexcept
Definition tags_filter.hpp:89
osmium::TagsFilterBase::operator()
TResult operator()(const osmium::Tag &tag) const noexcept
Definition tags_filter.hpp:126
osmium::TagsFilterBase::add_rule
TagsFilterBase & add_rule(const TResult result, const TagMatcher &matcher)
Definition tags_filter.hpp:100
osmium::TagsFilterBase::m_rules
std::vector< std::pair< TResult, TagMatcher > > m_rules
Definition tags_filter.hpp:68
osmium::TagsFilterBase::TagsFilterBase
TagsFilterBase(const TResult default_result=TResult{})
Definition tags_filter.hpp:81
osmium::memory::CollectionFilterIterator
Definition collection.hpp:117
matcher.hpp
osmium
Namespace for everything in the Osmium library.
Definition assembler.hpp:53
tag.hpp