Libosmium  2.13.0
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 (http://osmcode.org/libosmium).
7 
8 Copyright 2013-2017 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 <utility>
37 #include <vector>
38 
39 #include <osmium/osm/tag.hpp>
40 #include <osmium/tags/matcher.hpp>
41 
42 #include <boost/iterator/filter_iterator.hpp>
43 
44 namespace osmium {
45 
62  class TagsFilter {
63 
64  std::vector<std::pair<bool, TagMatcher>> m_rules;
66 
67  public:
68 
69  using iterator = boost::filter_iterator<TagsFilter, osmium::TagList::const_iterator>;
70 
77  explicit TagsFilter(bool default_result = false) :
78  m_default_result(default_result) {
79  }
80 
85  void set_default_result(bool default_result) noexcept {
86  m_default_result = default_result;
87  }
88 
96  TagsFilter& add_rule(bool result, const TagMatcher& matcher) {
97  m_rules.emplace_back(result, matcher);
98  return *this;
99  }
100 
109  template <typename... TArgs>
110  TagsFilter& add_rule(bool result, TArgs&&... args) {
111  m_rules.emplace_back(result, osmium::TagMatcher{std::forward<TArgs>(args)...});
112  return *this;
113  }
114 
122  bool operator()(const osmium::Tag& tag) const noexcept {
123  for (const auto& rule : m_rules) {
124  if (rule.second(tag)) {
125  return rule.first;
126  }
127  }
128  return m_default_result;
129  }
130 
136  size_t count() const noexcept {
137  return m_rules.size();
138  }
139 
145  bool empty() const noexcept {
146  return m_rules.empty();
147  }
148 
149  }; // class TagsFilter
150 
151 } // namespace osmium
152 
153 
154 #endif // OSMIUM_TAGS_TAGS_FILTER_HPP
Definition: tag.hpp:48
TagsFilter & add_rule(bool result, TArgs &&... args)
Definition: tags_filter.hpp:110
std::vector< std::pair< bool, TagMatcher > > m_rules
Definition: tags_filter.hpp:64
bool operator()(const osmium::Tag &tag) const noexcept
Definition: tags_filter.hpp:122
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
Definition: tags_filter.hpp:62
Definition: matcher.hpp:47
TagsFilter(bool default_result=false)
Definition: tags_filter.hpp:77
size_t count() const noexcept
Definition: tags_filter.hpp:136
bool m_default_result
Definition: tags_filter.hpp:65
void set_default_result(bool default_result) noexcept
Definition: tags_filter.hpp:85
TagsFilter & add_rule(bool result, const TagMatcher &matcher)
Definition: tags_filter.hpp:96
bool empty() const noexcept
Definition: tags_filter.hpp:145
boost::filter_iterator< TagsFilter, osmium::TagList::const_iterator > iterator
Definition: tags_filter.hpp:69