ParameterLibrary.h

#pragma once
 
#include <map>
#include <string>
#include <vector>
 
class ParameterLibrary
{
public:
   class Species
   {
   public:
      double SigmaBsPerKg(double meanLengthCm, double frequencykHz) const;
 
      double WeightKg(double lengthCm) const;
 
      double LengthCv() const { return m_lengthCv; }
 
   private:
      friend class ParameterLibrary;
 
      double TargetStrengthDb(double lengthCm, const std::vector<double>& data) const;
 
      const std::vector<double>& DataAt(double frequencykHz) const;
 
      std::string                           m_name;            
      bool                                  m_isTable = false; 
      std::map<double, std::vector<double>> m_dataByFrequency; 
      std::vector<double>                   m_lengthsCm;       
      double                                m_weightAG = 0.0;  
      double                                m_weightB  = 0.0;  
      double                                m_lengthCv = 0.0;  
   };
 
   static constexpr const char* kInstalledPath = "resources/acoustics/parameter_library.json";
 
   static std::vector<std::string> CandidatePaths(const std::string& configured, const std::string& inputFilePath);
 
   static ParameterLibrary Load(const std::string& configured, const std::string& inputFilePath);
 
   static ParameterLibrary FromFile(const std::string& path);
 
   static ParameterLibrary FromJsonString(const std::string& document);
 
   const std::string& Version() const { return m_version; }
 
   const std::string& Path() const { return m_path; }
 
   const Species* Find(const std::string& key) const;
 
   std::vector<std::string> SpeciesKeys() const;
 
private:
   std::string                    m_version; 
   std::string                    m_path;    
   std::map<std::string, Species> m_species; 
};