ObjectRegistry.h

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/*
* This file is part of Project SkyFire https://www.projectskyfire.org.
* See LICENSE.md file for Copyright information
*/
 
#ifndef SKYFIRE_OBJECTREGISTRY_H
#define SKYFIRE_OBJECTREGISTRY_H
 
#include "Define.h"
#include "Dynamic/UnorderedMap.h"
 
#include <map>
#include <string>
#include <vector>

template<class T, class Key = std::string>
class ObjectRegistry
{
public:
    typedef std::map<Key, T*> RegistryMapType;

    const T* GetRegistryItem(Key key) const
    {
        typename RegistryMapType::const_iterator iter = i_registeredObjects.find(key);
        return(iter == i_registeredObjects.end() ? NULL : iter->second);
    }

    bool InsertItem(T* obj, Key key, bool override = false)
    {
        typename RegistryMapType::iterator iter = i_registeredObjects.find(key);
        if (iter != i_registeredObjects.end())
        {
            if (!override)
                return false;
            delete iter->second;
            i_registeredObjects.erase(iter);
        }
 
        i_registeredObjects[key] = obj;
        return true;
    }

    void RemoveItem(Key key, bool delete_object = true)
    {
        typename RegistryMapType::iterator iter = i_registeredObjects.find(key);
        if (iter != i_registeredObjects.end())
        {
            if (delete_object)
                delete iter->second;
            i_registeredObjects.erase(iter);
        }
    }

    bool HasItem(Key key) const
    {
        return (i_registeredObjects.find(key) != i_registeredObjects.end());
    }

    unsigned int GetRegisteredItems(std::vector<Key>& l) const
    {
        unsigned int sz = l.size();
        l.resize(sz + i_registeredObjects.size());
        for (typename RegistryMapType::const_iterator iter = i_registeredObjects.begin(); iter != i_registeredObjects.end(); ++iter)
            l[sz++] = iter->first;
        return i_registeredObjects.size();
    }

    RegistryMapType const& GetRegisteredItems() const
    {
        return i_registeredObjects;
    }
 
    ObjectRegistry() { }
    ~ObjectRegistry()
    {
        for (typename RegistryMapType::iterator iter = i_registeredObjects.begin(); iter != i_registeredObjects.end(); ++iter)
            delete iter->second;
        i_registeredObjects.clear();
    }
private:
    RegistryMapType i_registeredObjects;
};
 
#endif