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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_CLONINGFACTORY_H
#define FL_CLONINGFACTORY_H
#include "fl/fuzzylite.h"
#include <map>
#include <string>
#include <vector>
namespace fl {
/**
The CloningFactory class is the base class for a factory whose objects
are created from a registered object by calling the `clone()` method.
@param <T> is the class of the object to be cloned
@author Juan Rada-Vilela, Ph.D.
@see FactoryManager
@since 5.0
*/
template <typename T>
class CloningFactory {
private:
std::string _name;
std::map<std::string, T> _objects;
public:
explicit CloningFactory(const std::string& name = "");
CloningFactory(const CloningFactory& other);
CloningFactory& operator=(const CloningFactory& other);
virtual ~CloningFactory();
FL_DEFAULT_MOVE(CloningFactory)
/**
Returns the name of the factory
@return the name of the factory
*/
virtual std::string name() const;
/**
Registers the object in the factory and assumes its ownership
@param key is the unique name by which objects are registered
@param object is the object to be cloned via a `clone` method
*/
virtual void registerObject(const std::string& key, T object);
/**
Deregisters the given object from the factory and deletes it
@param key is the unique name by which objects are registered
*/
virtual void deregisterObject(const std::string& key);
/**
Checks whether the factory has the given object registered
@param key is the unique name by which objects are registered
@return whether the factory has the given object registered
*/
virtual bool hasObject(const std::string& key) const;
/**
Gets the object registered by the given key, not a clone of the object
@param key is the unique name by which objects are registered
@return the object registered by the given key
*/
virtual T getObject(const std::string& key) const;
/**
Creates a cloned object by executing the clone method on the registered object
@param key is the unique name by which objects are registered
@return a cloned object by executing the clone method on the registered object
*/
virtual T cloneObject(const std::string& key) const;
/**
Returns a vector of the available objects
@return a vector of the available objects
*/
virtual std::vector<std::string> available() const;
/**
Gets the map of registered keys and objects
@return the map of registered keys and objects
*/
virtual std::map<std::string, T>& objects();
/**
Gets an immutable map of registered keys and objects
@return an immutable map of registered keys and objects
*/
virtual const std::map<std::string, T>& objects() const;
};
}
/**
Template implementation
*/
#include "fl/Exception.h"
namespace fl {
template<typename T>
inline CloningFactory<T>::CloningFactory(const std::string& name) : _name(name) {
}
template<typename T>
inline CloningFactory<T>::CloningFactory(const CloningFactory& other) {
typename std::map<std::string, T>::const_iterator it = other._objects.begin();
while (it != other._objects.end()) {
T clone = fl::null;
if (it->second) clone = it->second->clone();
this->_objects[it->first] = clone;
++it;
}
}
template<typename T>
inline CloningFactory<T>& CloningFactory<T>::operator=(const CloningFactory& other) {
if (this != &other) {
typename std::map<std::string, T>::const_iterator it = this->_objects.begin();
while (it != this->_objects.end()) {
if (it->second) delete it->second;
++it;
}
this->_objects.clear();
it = other._objects.begin();
while (it != other._objects.end()) {
T clone = fl::null;
if (it->second) clone = it->second->clone();
this->_objects[it->first] = clone;
++it;
}
}
return *this;
}
template<typename T>
inline CloningFactory<T>::~CloningFactory() {
typename std::map<std::string, T>::const_iterator it = this->_objects.begin();
while (it != this->_objects.end()) {
if (it->second) delete it->second;
++it;
}
}
template<typename T>
inline std::string CloningFactory<T>::name() const {
return this->_name;
}
template<typename T>
inline void CloningFactory<T>::registerObject(const std::string& key, T object) {
this->_objects[key] = object;
}
template<typename T>
inline void CloningFactory<T>::deregisterObject(const std::string& key) {
typename std::map<std::string, T>::iterator it = this->_objects.find(key);
if (it != this->_objects.end()) {
this->_objects.erase(it);
delete it->second;
}
}
template<typename T>
inline bool CloningFactory<T>::hasObject(const std::string& key) const {
typename std::map<std::string, T>::const_iterator it = this->_objects.find(key);
return (it != this->_objects.end());
}
template<typename T>
inline T CloningFactory<T>::getObject(const std::string& key) const {
typename std::map<std::string, T>::const_iterator it = this->_objects.find(key);
if (it != this->_objects.end()) {
if (it->second) return it->second;
}
return fl::null;
}
template<typename T>
inline T CloningFactory<T>::cloneObject(const std::string& key) const {
typename std::map<std::string, T>::const_iterator it = this->_objects.find(key);
if (it != this->_objects.end()) {
if (it->second) return it->second->clone();
return fl::null;
}
throw Exception("[cloning error] " + _name + " object by name <" + key + "> not registered", FL_AT);
}
template<typename T>
inline std::vector<std::string> CloningFactory<T>::available() const {
std::vector<std::string> result;
typename std::map<std::string, T>::const_iterator it = this->_objects.begin();
while (it != this->_objects.end()) {
result.push_back(it->first);
}
return result;
}
template<typename T>
inline std::map<std::string, T>& CloningFactory<T>::objects() {
return this->_objects;
}
template<typename T>
inline const std::map<std::string, T>& CloningFactory<T>::objects() const {
return this->_objects;
}
}
#endif /* FL_CLONINGFACTORY_H */
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