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javahibernatehibernate-annotations

hibernate annotations: map a list that keeps order

I want to do a one to many mapping that keeps order. The order itself is complex and related to business logic and does not have a single field or simple logic that can represent it.

What I want is to load an object, swap two elements (or more) in the list and save and do session.update(object). I expect next time the element is loaded to keep the right order however it does not.

What I am doing:

@Entity
 public class Product {

@Id @GeneratedValue(strategy=GenerationType.AUTO)
private long id;
@OneToMany(fetch=FetchType.EAGER)
private List<Image> images = new ArrayList<Image>();

  blah blah blah

 }
Solution

  • @OrderColumndid the trick for me