@Override
public void spawnEntity(Entity entity) {
if (entity == null) throw new NullPointerException();
synchronized (entities) {
if (!entities.contains(entity)) entities.add(entity);
}
}
@Override
public void despawnEntity(Entity entity) {
if (entity == null) throw new NullPointerException();
synchronized (entities) {
entities.remove(entity);
}
}
@Override
public Entity[] getEntities() {
synchronized (entities) {
return entities.toArray(new Entity[entities.size()]);
}
}