openvehicle-api/examples/_howto_examples/example_config_file_parsing.cfg

#include <iostream>
#include <support/component_impl.h>
#include <support/toml.h>

class DemoConfigurationComponent : public sdv::CSdvObject
{
public:
	DECLARE_OBJECT_CLASS_TYPE(sdv::EObjectType::device)
	DECLARE_OBJECT_CLASS_NAME("Configuration_Example")

    // Parameter map
    BEGIN_SDV_PARAM_MAP()
        SDV_PARAM_ENABLE_LOCKING()          //  optional, if the parameter should be updatable
        SDV_PARAM_ENTRY(m_InitializedValue, "initializedValue", 7, "km/h", "Description for an initialized parameter.")
        SDV_PARAM_ENTRY(m_UpdatableValue,   "updatableValue",   7, "m/s", "Description for an updatable parameter.")
    END_SDV_PARAM_MAP()

    /**
     * @brief Initialization event, called after object configuration was loaded. Overload of sdv::CSdvObject::OnInitialize.
     * @return Returns 'true' when the initialization was successful, 'false' when not.
     */
    virtual bool OnInitialize() override
    {
        try
        {
            sdv::toml::CTOMLParser config(GetObjectConfig());

            sdv::toml::CNode messageNode = config.GetDirect("Message");
            if (messageNode.GetType() == sdv::toml::ENodeType::node_string)
            {
                m_Message = static_cast<std::string>(messageNode.GetValue());
            }
            
            sdv::toml::CNode jsonNode = config.GetDirect("JSONConfig");
            if (jsonNode.GetType() == sdv::toml::ENodeType::node_string)
            {
                m_JSONConfig = static_cast<std::string>(jsonNode.GetValue());
            }
            
            sdv::toml::CNode idNode = config.GetDirect("Id");
            if (idNode.GetType() == sdv::toml::ENodeType::node_integer)
            {
                m_Id = static_cast<int32_t>(idNode.GetValue());
            }

            sdv::toml::CNode floatNode = config.GetDirect("Pi");
            if (floatNode.GetType() == sdv::toml::ENodeType::node_floating_point)
            {
                m_Pi = static_cast<float>(floatNode.GetValue());
            }

            sdv::toml::CNode boolNode = config.GetDirect("Boolean");
            if (boolNode.GetType() == sdv::toml::ENodeType::node_boolean)
            {
                m_IsValid = static_cast<bool>(boolNode.GetValue());
            }

            sdv::toml::CNodeCollection arrayNodes = config.GetDirect("Array");
            if (arrayNodes.GetType() == sdv::toml::ENodeType::node_array)
            {
                for (size_t nIndex = 0; nIndex < arrayNodes.GetCount(); nIndex++)
                {
                    sdv::toml::CNode node = arrayNodes[nIndex];
                    if (node.GetType() == sdv::toml::ENodeType::node_integer)
                    {
                        m_Counters.push_back(static_cast<uint32_t>(node.GetValue()));
                    }
                }
            }

            sdv::toml::CNodeCollection tableNodes = config.GetDirect("Table");
            if (tableNodes.GetType() == sdv::toml::ENodeType::node_table)
            {
                if (tableNodes.GetCount() >= 3)
                {
                    m_TableA = static_cast<uint32_t>(tableNodes[0].GetValue());
                    m_TableB = static_cast<float>(tableNodes[1].GetValue());
                    m_TableC = static_cast<std::string>(tableNodes[2].GetValue());
                }
            }

            auto table_a = config.GetDirect("Table.a");
            auto table_b = config.GetDirect("Table.b");
            auto table_c = config.GetDirect("Table.c");
            m_DirectTableA = static_cast<uint32_t>(table_a.GetValue());
            m_DirectTableB = static_cast<float>(table_b.GetValue());
            m_DirectTableC = static_cast<std::string>(table_c.GetValue());

        }
        catch (const sdv::toml::XTOMLParseException& e)
        {
            SDV_LOG_ERROR("Parsing error: ", e.what());

            return false;
        }

        PrintAllVariables();

        return true;
    };

    /**
     * @brief Shutdown the object. Overload of sdv::CSdvObject::OnShutdown.
     */
    virtual void OnShutdown() override
    {}

    /**
    * @brief Print all global variables to console
    */
    void PrintAllVariables()  const
    {
        std::cout << "\n----------\nValues from the parameter map:" << std::endl;        
        std::cout << "Expected 7, got " << "initialized value - not changed, not in configuration file: " << std::to_string(m_InitializedValue) << std::endl;          
        std::cout << "Expected 13, got " << "updated value - changed, found in configuration file: " << std::to_string(m_UpdatableValue) << std::endl;
        std::cout << "\n----------\nValues parsed during initialization:" << std::endl;
        std::cout << "Expected 'It's me', got " << "string: " << m_Message.c_str() << std::endl;
        std::cout << "multiline string: " << m_JSONConfig.c_str() << std::endl;
        std::cout << "Expected 42, got " << "integer: " << std::to_string(m_Id) << std::endl;
        std::cout << "Expected 3.141593, got " << "float: " << std::to_string(m_Pi) << std::endl;
        std::cout << "Expected 1, got " << "bool: " << std::to_string(m_IsValid) << std::endl;
        std::cout << "Expected 77, got " << "table column a: " << std::to_string(m_TableA) << "     " << std::to_string(m_DirectTableA) << std::endl;
        std::cout << "Expected 1.200000, got " << "table column b: " << std::to_string(m_TableB) << "     " << std::to_string(m_DirectTableB) << std::endl;
        std::cout << "Expected 'this is a string', got " << "table column c: " << m_TableC.c_str() << "     " << m_DirectTableC.c_str() << std::endl;
        for (auto counter : m_Counters)
        {
            std::cout << std::to_string(counter) << ", ";
        }
        std::cout << std::endl;
    }

  private:
    std::string           m_Message { "" };
    std::string           m_JSONConfig { "" };
    int32_t               m_Id { -1 };
    float                 m_Pi { 0.0 };
    bool                  m_IsValid { false };
    std::vector<uint32_t> m_Counters{};
    uint32_t              m_TableA { 0 };
    float                 m_TableB { 0.0 };
    std::string           m_TableC { "" };
    uint32_t              m_DirectTableA { 0 };
    float                 m_DirectTableB { 0.0 };
    std::string           m_DirectTableC { "" };
    uint32_t              m_InitializedValue { 0 };
    uint32_t              m_UpdatableValue { 0 }; 
};

DEFINE_SDV_OBJECT(DemoConfigurationComponent)