GenericParam.h

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/* Author: Ioan Sucan */
 
#ifndef OMPL_BASE_GENERIC_PARAM_
#define OMPL_BASE_GENERIC_PARAM_
 
#include "ompl/util/Console.h"
#include "ompl/util/String.h"
#include "ompl/util/ClassForward.h"
#include <functional>
#include <iostream>
#include <string>
#include <sstream>
#include <utility>
#include <vector>
#include <map>
 
namespace ompl
{
    namespace base
    {
 
        OMPL_CLASS_FORWARD(GenericParam);
 
        class GenericParam
        {
        public:
            GenericParam(std::string name) : name_(std::move(name))
            {
            }
 
            virtual ~GenericParam() = default;
 
            const std::string &getName() const
            {
                return name_;
            }
 
            void setName(const std::string &name)
            {
                name_ = name;
            }
 
            virtual bool setValue(const std::string &value) = 0;
 
            virtual std::string getValue() const = 0;
 
            template <typename T>
            GenericParam &operator=(const T &value)
            {
                setValue(std::to_string(value));
                return *this;
            }
 
            void setRangeSuggestion(const std::string &rangeSuggestion)
            {
                rangeSuggestion_ = rangeSuggestion;
            }
 
            const std::string &getRangeSuggestion() const
            {
                return rangeSuggestion_;
            }
 
        protected:
            std::string name_;
 
            std::string rangeSuggestion_;
        };
 
        template <typename T>
        class SpecificParam : public GenericParam
        {
        public:
            using SetterFn = std::function<void(T)>;
 
            using GetterFn = std::function<T()>;
 
            SpecificParam(const std::string &name, SetterFn setter, GetterFn getter = GetterFn())
              : GenericParam(name), setter_(std::move(setter)), getter_(std::move(getter))
            {
                if (!setter_ && !getter_)
                    OMPL_ERROR("At least one setter or getter function must be specified for parameter");
            }
 
            ~SpecificParam() override = default;
 
            bool setValue(const std::string &value) override
            {
                bool result = true;
                try
                {
                    if (setter_)
                        setter_(lexical_cast(value));
                }
                catch (std::invalid_argument &e)
                {
                    result = false;
                    OMPL_WARN("Invalid value format specified for parameter '%s': %s", name_.c_str(), e.what());
                }
 
                if (getter_)
                    OMPL_DEBUG("The value of parameter '%s' is now: '%s'", name_.c_str(), getValue().c_str());
                else
                    OMPL_DEBUG("The value of parameter '%s' was set to: '%s'", name_.c_str(), value.c_str());
                return result;
            }
 
            std::string getValue() const override
            {
                return getter_ ? std::to_string(getter_()) : "";
            }
 
        protected:
            T lexical_cast(const std::string &value) const;
 
            SetterFn setter_;
 
            GetterFn getter_;
        };
 
        template <>
        inline std::string ompl::base::SpecificParam<float>::getValue() const
        {
            return getter_ ? ompl::toString(getter_()) : "";
        }
        template <>
        inline std::string ompl::base::SpecificParam<double>::getValue() const
        {
            return getter_ ? ompl::toString(getter_()) : "";
        }
        template <>
        inline std::string ompl::base::SpecificParam<long double>::getValue() const
        {
            return getter_ ? ompl::toString(getter_()) : "";
        }
        template <>
        inline std::string ompl::base::SpecificParam<std::string>::getValue() const
        {
            return getter_ ? getter_() : "";
        }
 
 
        OMPL_CLASS_FORWARD(ParamSet);
 
        class ParamSet
        {
        public:
            template <typename T>
            void declareParam(const std::string &name, const typename SpecificParam<T>::SetterFn &setter,
                              const typename SpecificParam<T>::GetterFn &getter = [] { return T(); })
            {
                params_[name] = std::make_shared<SpecificParam<T>>(name, setter, getter);
            }
 
            void add(const GenericParamPtr &param);
 
            void remove(const std::string &name);
 
            void include(const ParamSet &other, const std::string &prefix = "");
 
            bool setParam(const std::string &key, const std::string &value);
 
            bool getParam(const std::string &key, std::string &value) const;
 
            bool setParams(const std::map<std::string, std::string> &kv, bool ignoreUnknown = false);
 
            void getParams(std::map<std::string, std::string> &params) const;
 
            void getParamNames(std::vector<std::string> &params) const;
 
            void getParamValues(std::vector<std::string> &vals) const;
 
            const std::map<std::string, GenericParamPtr> &getParams() const;
 
            const GenericParamPtr &getParam(const std::string &key) const;
 
            bool hasParam(const std::string &key) const;
 
            GenericParam &operator[](const std::string &key);
 
            std::size_t size() const
            {
                return params_.size();
            }
 
            void clear();
 
            void print(std::ostream &out) const;
 
        private:
            std::map<std::string, GenericParamPtr> params_;
        };
    }  // namespace base
}  // namespace ompl
 
#endif