Libosmium  2.17.3
Fast and flexible C++ library for working with OpenStreetMap data
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 2013-2022 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>
67 
68  std::vector<std::pair<TResult, TagMatcher>> m_rules;
70 
71  public:
72 
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 
156 
157 } // namespace osmium
158 
159 
160 #endif // OSMIUM_TAGS_TAGS_FILTER_HPP
Definition: matcher.hpp:48
Definition: tag.hpp:48
Definition: tags_filter.hpp:66
TResult m_default_result
Definition: tags_filter.hpp:69
TagsFilterBase & add_rule(const TResult result, const TagMatcher &matcher)
Definition: tags_filter.hpp:100
std::size_t count() const noexcept
Definition: tags_filter.hpp:140
TagsFilterBase & add_rule(const TResult result, TArgs &&... args)
Definition: tags_filter.hpp:114
bool empty() const noexcept
Definition: tags_filter.hpp:149
void set_default_result(const TResult default_result) noexcept
Definition: tags_filter.hpp:89
TResult operator()(const osmium::Tag &tag) const noexcept
Definition: tags_filter.hpp:126
std::vector< std::pair< TResult, TagMatcher > > m_rules
Definition: tags_filter.hpp:68
TagsFilterBase(const TResult default_result=TResult{})
Definition: tags_filter.hpp:81
Definition: collection.hpp:117
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53