Recursive function with ArrayList - Java

recursive.java

public static ArrayList<E> getFunction(Object x, int level, ArrayList<E> list) {
		if (level == 1) {
			Object x2 = DB.getInstance().getObjectById(x.getID());
			list.add(x2);
			return list;
		} else {
			Object x2 = DB.getInstance().getObjectById(x.getID());
			level = level - 1;
			list.add(x2);
			return getFunction(x2, level, list);
		}
}