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/*
* Originally written by Rochet2 - Copyright (C) 2018+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: http://github.com/azerothcore/azerothcore-wotlk/LICENSE-AGPL
*/
#ifndef _DATA_MAP_H_
#define _DATA_MAP_H_
#include <string>
#include <unordered_map>
#include <memory>
#include <type_traits>
class DataMap
{
public:
/**
* Base class that you should inherit in your script.
* Inheriting classes can be stored to DataMap
*/
class Base
{
public:
virtual ~Base() = default;
};
/**
* Returns a pointer to object of requested type stored with given key or nullptr
*/
template<class T> T* Get(std::string const & k) const {
static_assert(std::is_base_of<Base, T>::value, "T must derive from Base");
if (Container.empty())
return nullptr;
auto it = Container.find(k);
if (it != Container.end())
return dynamic_cast<T*>(it->second.get());
return nullptr;
}
/**
* Returns a pointer to object of requested type stored with given key
* or default constructs one and returns that one
*/
template<class T, typename std::enable_if<std::is_default_constructible<T>::value, int>::type = 0>
T* GetDefault(std::string const & k) {
static_assert(std::is_base_of<Base, T>::value, "T must derive from Base");
if (T* v = Get<T>(k))
return v;
T* v = new T();
Container.emplace(k, std::unique_ptr<T>(v));
return v;
}
/**
* Stores a new object that inherits the Base class with the given key
*/
void Set(std::string const & k, Base* v) { Container[k] = std::unique_ptr<Base>(v); }
/**
* Removes objects with given key and returns true if one was removed, false otherwise
*/
bool Erase(std::string const & k) { return Container.erase(k) != 0; }
private:
std::unordered_map<std::string, std::unique_ptr<Base>> Container;
};
#endif
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