PlayerDataBus.java

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package com.runehive.game.event.bus;
 
import com.runehive.game.event.Event;
import com.runehive.game.event.listener.PlayerEventListener;
import com.runehive.game.world.entity.mob.player.Player;
 
import java.util.HashSet;
import java.util.Set;
 
public final class PlayerDataBus {
 
    private static final PlayerDataBus INSTANCE = new PlayerDataBus();
 
    private PlayerDataBus() {
 
    }
 
    public static PlayerDataBus getInstance() {
        return INSTANCE;
    }
 
    private static final Set<PlayerEventListener> chain = new HashSet<>();
 
    public void subscribe(PlayerEventListener listener) {
        chain.add(listener);
    }
 
    public void unsubscribe(PlayerEventListener listener) {
        chain.remove(listener);
    }
 
    public boolean publish(Player player, Event event) {
        for (PlayerEventListener listener : chain) {
            if (listener.accept(player, event)) {
                return true;
            }
        }
        return false;
    }
 
}