Spigot - Saveable Gamer

Gamer

import com.erezbiox1.bioarena.Main;
import com.erezbiox1.bioarena.Utils.Serializer;
import org.bukkit.Bukkit;
import org.bukkit.entity.Player;

import java.io.Serializable;
import java.util.*;

/**
 * Created by Erezbiox1 on 01/05/2017.
 * (C) 2016 Erez Rotem All Rights Reserved.
 */
public class Gamer implements Serializable{

    private transient static java.util.Map<UUID, Gamer> gamers = new HashMap<>();

    private transient Player player;
    private UUID uuid;

    // Fields - Trasniet for non saveable ones.
    
    // *****
    
    // Fields

    // Loading the gamer

    private Gamer(UUID uuid){
        load(uuid);
    }

    private Gamer load(UUID uuid){
        this.uuid = uuid;
        gamers.put(uuid, this);
        player = Bukkit.getPlayer(uuid);
        return this;
    }

    // Methods
    
    // ******
    
    // Methods

    public Player getPlayer(){
        return player;
    }

    // getGamer

    public static Gamer getGamer(UUID uuid){
        if(gamers.containsKey(uuid))
            return gamers.get(uuid);

        Serializer serializer = Main.getSerializer();
        String key = uuid.toString();
        if(serializer.doesHave(key))
            return ((Gamer) serializer.load(key)).load(uuid);
        else{
            Gamer gamer = new Gamer(uuid);
            serializer.add(key, gamer);
            return gamer;
        }
    }

    public static Gamer getGamer(Player player){
        return getGamer(player.getUniqueId());
    }

    public static Gamer getGamer(String username){
        Player player = Bukkit.getPlayer(username);
        if (player == null) return null;
        return getGamer(player.getUniqueId());
    }
}