Initialize extended class through base class factory in Java

It's my first question here so please don't be angry at me if something wrong.

Here is the problem: We have class Node. It's a base class for class Item. So basically:

public class Item extends Node

Ok, still everything is fine. But we also have class let's call it NodeFactory that contains static method loadNodeAssets returning Node as a result.

 public static Node loadNodeAssets (String path)

In the library I am using it is only way to initialize Node class and load assets into it. But the main problem is that I need to get Item class instance but not Node. How could I accomplish it?

 Item f = (Item)NodeFacory.loadNodeAssets ("...")

Not working since returning class has type Node but not Item. Basically I need to construct Fish class and initialize inherited fields in the Node class which Fish class extending. Sorry for my english. Hope for your help. Thank you!

First you should find out what class you are actually getting back:

Node n = NodeFacory.loadNodeAssets ("...")
System.out.println(n.getClass());

If it turns out to be a Node then your only way of getting an Item will be to construct it manually:

Node n = NodeFacory.loadNodeAssets ("...")
Item i = new Item();
i.setAAA(n.getAAA());
i.setBBB(n.getBBB());

If the library doesn't allow you to construct Items at all, then there are only two possibilities:

1. You misunderstand how the library should be used. Maybe you think you need an Item but you really only need a Node.
2. The library's design is bogus. In this case you should probably look for alternatives, or - if you have the source code - fix it yourself.