ConfigurationFile.h

Go to the documentation of this file.

//=======================================================================================
// ____          ____    __    ______     __________   __      __       __        __
// \    \       |    |  |  |  |   _   \  |___    ___| |  |    |  |     /  \      |  |
//  \    \      |    |  |  |  |  |_)   |     |  |     |  |    |  |    /    \     |  |
//   \    \     |    |  |  |  |   _   /      |  |     |  |    |  |   /  /\  \    |  |
//    \    \    |    |  |  |  |  | \  \      |  |     |   \__/   |  /  ____  \   |  |____
//     \    \   |    |  |__|  |__|  \__\     |__|      \________/  /__/    \__\  |_______|
//      \    \  |    |   ________________________________________________________________
//       \    \ |    |  |  ______________________________________________________________|
//        \    \|    |  |  |         __          __     __     __     ______      _______
//         \         |  |  |_____   |  |        |  |   |  |   |  |   |   _  \    /  _____)
//          \        |  |   _____|  |  |        |  |   |  |   |  |   |  | \  \   \_______
//           \       |  |  |        |  |_____   |   \_/   |   |  |   |  |_/  /    _____  |
//            \ _____|  |__|        |________|   \_______/    |__|   |______/    (_______/
//
//  This file is part of VirtualFluids. VirtualFluids is free software: you can
//  redistribute it and/or modify it under the terms of the GNU General Public
//  License as published by the Free Software Foundation, either version 3 of
//  the License, or (at your option) any later version.
//
//  VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
//  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
//  for more details.
//
//  SPDX-License-Identifier: GPL-3.0-or-later
//  SPDX-FileCopyrightText: Copyright © VirtualFluids Project contributors, see AUTHORS.md in root folder
//
//=======================================================================================
#ifndef BASICS_CONFIGURATIONFILE_H
#define BASICS_CONFIGURATIONFILE_H
 
#include <logger/Logger.h>
 
#include <map>
#include <sstream>
#include <string>
#include <vector>
 
#include <basics/utilities/UbException.h>
 
 
namespace vf::basics
{
 
template <class T>
T convert_to(const std::string& value)
{
    std::istringstream stream(value);
    T typedValue;
    stream >> typedValue;
    if (stream.fail())
        throw UbException(UB_EXARGS, " cannot convert \"" + value + "\" to type <" +
                                         static_cast<std::string>(typeid(typedValue).name()) + ">");
 
    return typedValue;
}
 
template <>
bool convert_to<bool>(const std::string& value);
 
class ConfigurationFile
{
public:
    void clear();
 
    void load(const std::string& File);
 
    bool contains(const std::string& key) const;
 
    template <class T>
    std::vector<T> getVector(const std::string& key) const;
 
    template <class T>
    T getValue(const std::string& key) const;
 
    template <class T>
    T getValue(const std::string& key, T defaultValue) const;
 
    std::map<std::string, std::string> data;
 
private:
    std::string getValue(const std::string& key) const;
 
    static std::string trim(const std::string& str);
 
    // template <class T>
    // T convert_to(const std::string& value) const;
 
    void split(std::vector<std::string>& lst, const std::string& input, const std::string& separators,
               bool remove_empty = true) const;
};
 
template <class T>
std::vector<T> ConfigurationFile::getVector(const std::string& key) const
{
    std::string string_value = getValue(key);
    std::vector<T> values;
    std::vector<std::string> string_vector;
    split(string_vector, string_value, "\t\n\r;, ");
    for (std::vector<std::string>::iterator it = string_vector.begin(); it != string_vector.end(); ++it) {
        if (!(*it).empty()) {
            values.push_back(convert_to<T>(*it));
        }
    }
    return values;
}
 
template <class T>
T ConfigurationFile::getValue(const std::string& key) const
{
    std::string value = getValue(key);
 
    return convert_to<T>(value);
}
 
template <class T>
T ConfigurationFile::getValue(const std::string& key, T defaultValue) const
{
    if (contains(key)) {
        return getValue<T>(key);
    }
    return defaultValue;
}
 
ConfigurationFile loadConfig(int argc, char* argv[], std::string configPath = "./config.txt");
 
} // namespace vf::basics
 
#endif