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src/pfaedle/trgraph/Normalizer.h

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+// Copyright 2018, University of Freiburg,
+// Chair of Algorithms and Data Structures.
+// Authors: Patrick Brosi <brosi@informatik.uni-freiburg.de>
+
+#ifndef PFAEDLE_TRGRAPH_NORMALIZER_H_
+#define PFAEDLE_TRGRAPH_NORMALIZER_H_
+
+#include <regex>
+#include <string>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+namespace pfaedle {
+namespace trgraph {
+
+typedef std::pair<std::string, std::string> ReplRule;
+typedef std::vector<ReplRule> ReplRules;
+
+typedef std::pair<std::regex, std::string> ReplRuleComp;
+typedef std::vector<ReplRuleComp> ReplRulesComp;
+
+/*
+ * A class for normalizing station names
+ */
+class Normalizer {
+ public:
+  Normalizer() {}
+  explicit Normalizer(const ReplRules& rules);
+
+  // Normalize sn based on the rules of this normalizer
+  std::string operator()(std::string sn) const;
+  bool operator==(const Normalizer& b) const;
+
+ private:
+  ReplRulesComp _rules;
+  ReplRules _rulesOrig;
+  mutable std::unordered_map<std::string, std::string> _cache;
+
+  void buildRules(const ReplRules& rules);
+};
+}  // namespace trgraph
+}  // namespace pfaedle
+
+#endif  // PFAEDLE_TRGRAPH_NORMALIZER_H_