public class Order
{
private String orderId;
private String detail;
private Item item;
}

public class Item
{
private String itemId;
private String itemName;
}

===============

Each class maps to a different database table.

session.save(order) would saves orderId and detail into the order table but information in item property would be saved into item table.

order = session.load(Order.class, "123"); would load orderId amd detail from order table but it loads property item from the item table.

Would anyone show me how to write the mapping file?
Thanks.