property_key_db.h

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#ifndef ED_PROPERTY_KEY_DB_H_
#define ED_PROPERTY_KEY_DB_H_
 
#include "ed/types.h"
#include "ed/property_key.h"
#include "ed/property_info.h"
 
#include <map>
 
namespace ed
{
 
struct PropertyKeyDBEntry
{
    PropertyKeyDBEntry() : info(nullptr) {}
 
    ~PropertyKeyDBEntry()
    {
        if (info)
            delete info;
    }
 
    std::string name;
    PropertyInfo* info;
    Idx idx;
};
 
class PropertyKeyDB
{
 
public:
 
    ~PropertyKeyDB()
    {
        for(std::map<std::string, PropertyKeyDBEntry*>::iterator it = name_to_info_.begin(); it != name_to_info_.end(); ++it)
        {
            if(it->second)
                delete it->second;
        }
    }
 
    template<typename T>
    void registerProperty(const std::string& name, PropertyKey<T>& key, PropertyInfo* info = 0)
    {
        PropertyKeyDBEntry* entry;
 
        std::map<std::string, PropertyKeyDBEntry*>::iterator it = name_to_info_.find(name);
        if (it == name_to_info_.end())
        {
            entry = new PropertyKeyDBEntry;
            entry->name = name;
            entry->idx = name_to_info_.size();
 
            if (info)
                entry->info = info;
            else
                entry->info = new PropertyInfo;
 
            name_to_info_[name] = entry;
        }
        else
        {
            entry = it->second;
 
            if (info)
            {
                // TODO: needs locking? (Keys may access the entry info at this point)
                delete entry->info;
                entry->info = info;
            }
        }
 
        key.entry = entry;
        key.idx = entry->idx;
    }
 
    const PropertyKeyDBEntry* getPropertyKeyDBEntry(const std::string& name) const
    {
        std::map<std::string, PropertyKeyDBEntry*>::const_iterator it = name_to_info_.find(name);
        if (it == name_to_info_.end())
            return 0;
 
        return it->second;
    }
 
private:
 
    std::map<std::string, PropertyKeyDBEntry*> name_to_info_;
 
};
 
} // end namespace
 
#endif