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/*
fuzzylite (R), a fuzzy logic control library in C++.
Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
This file is part of fuzzylite.
fuzzylite is free software: you can redistribute it and/or modify it under
the terms of the FuzzyLite License included with the software.
You should have received a copy of the FuzzyLite License along with
fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
fuzzylite is a registered trademark of FuzzyLite Limited.
*/
#ifndef FL_CONSTRUCTIONFACTORY_H
#define FL_CONSTRUCTIONFACTORY_H
#include "fl/fuzzylite.h"
#include <map>
#include <string>
#include <vector>
namespace fl {
/**
The ConstructionFactory class is the base class for a factory whose
objects are created from a registered ConstructionFactory::Constructor.
@author Juan Rada-Vilela, Ph.D.
@see FactoryManager
@since 5.0
*/
template <typename T>
class ConstructionFactory {
public:
/**
The Constructor type definition refers to a zero-parameter method
which returns an instance of T
*/
typedef T(*Constructor)();
private:
std::string _name;
std::map<std::string, Constructor> _constructors;
public:
explicit ConstructionFactory(const std::string& name);
virtual ~ConstructionFactory();
FL_DEFAULT_COPY_AND_MOVE(ConstructionFactory)
/**
Returns the name of the factory
@return the name of the factory
*/
virtual std::string name() const;
/**
Registers the constructor in the factory
@param key is the unique name by which constructors are registered
@param constructor is the pointer to the constructor of the object
*/
virtual void registerConstructor(const std::string& key, Constructor constructor);
/**
Deregisters from the factory the constructor associated to the given key
@param key is the unique name by which constructors are registered
*/
virtual void deregisterConstructor(const std::string& key);
/**
Checks whether the factory has a constructor registered by the given key
@param key is the unique name by which constructors are registered
@return whether the factory has the given constructor registered
*/
virtual bool hasConstructor(const std::string& key) const;
/**
Gets the constructor registered by the given key
@param key is the unique name by which constructors are registered
@return the pointer to the given constructor
*/
virtual Constructor getConstructor(const std::string& key) const;
/**
Creates an object by executing the constructor associated to the given key
@param key is the unique name by which constructors are registered
@return an object by executing the constructor associated to the given key
*/
virtual T constructObject(const std::string& key) const;
/**
Returns a vector of keys for the constructors available
@return a vector of keys for the constructors available
*/
virtual std::vector<std::string> available() const;
/**
Gets the map of registered keys and constructors
@return the map of registered keys and constructors
*/
virtual std::map<std::string, Constructor>& constructors();
/**
Gets an immutable map of registered keys and constructors
@return an immutable map of registered keys and constructors
*/
virtual const std::map<std::string, Constructor>& constructors() const;
};
}
/**
* Template implementation
*/
#include "fl/Exception.h"
#include "fl/defuzzifier/Defuzzifier.h"
#include "fl/hedge/Hedge.h"
#include "fl/norm/SNorm.h"
#include "fl/norm/TNorm.h"
#include "fl/term/Term.h"
namespace fl {
template <typename T>
inline ConstructionFactory<T>::ConstructionFactory(const std::string& name) : _name(name) {
}
template <typename T>
inline ConstructionFactory<T>::~ConstructionFactory() {
}
template<typename T>
inline std::string ConstructionFactory<T>::name() const {
return this->_name;
}
template <typename T>
inline void ConstructionFactory<T>::registerConstructor(const std::string& key, Constructor constructor) {
this->_constructors[key] = constructor;
}
template <typename T>
inline void ConstructionFactory<T>::deregisterConstructor(const std::string& key) {
typename std::map<std::string, Constructor>::iterator it = this->_constructors.find(key);
if (it != this->_constructors.end()) {
this->_constructors.erase(it);
}
}
template <typename T>
inline bool ConstructionFactory<T>::hasConstructor(const std::string& key) const {
typename std::map<std::string, Constructor>::const_iterator it = this->_constructors.find(key);
return (it != this->_constructors.end());
}
template <typename T>
inline typename ConstructionFactory<T>::Constructor ConstructionFactory<T>::getConstructor(const std::string& key) const {
typename std::map<std::string, Constructor>::const_iterator it = this->_constructors.find(key);
if (it != this->_constructors.end()) {
return it->second;
}
return fl::null;
}
template <typename T>
inline T ConstructionFactory<T>::constructObject(const std::string& key) const {
typename std::map<std::string, Constructor>::const_iterator it = this->_constructors.find(key);
if (it != this->_constructors.end()) {
if (it->second) {
return it->second();
}
return fl::null;
}
std::ostringstream ss;
ss << "[factory error] constructor of " + _name + " <" << key << "> not registered";
throw Exception(ss.str(), FL_AT);
}
template <typename T>
inline std::vector<std::string> ConstructionFactory<T>::available() const {
std::vector<std::string> result;
typename std::map<std::string, Constructor>::const_iterator it = this->_constructors.begin();
while (it != this->_constructors.end()) {
result.push_back(it->first);
++it;
}
return result;
}
template<typename T>
inline std::map<std::string, typename ConstructionFactory<T>::Constructor>& ConstructionFactory<T>::constructors() {
return this->_constructors;
}
template<typename T>
inline const std::map<std::string, typename ConstructionFactory<T>::Constructor>& ConstructionFactory<T>::constructors() const {
return this->_constructors;
}
}
#endif /* FL_CONSTRUCTIONFACTORY_H */
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