Hope I can help.
I have this class ItemHolder which holds Item. I added
"@*org.hibernate.annotations.Cascade(value
= org.hibernate.annotations.CascadeType.DELETE_ORPHAN)*" to avoid orphans,
that's a Hibernate specific annotation so if you're not using Hibernate
should remove that line.
@Entity
public class ItemHolder extends BaseObject implements Serializable {
private static final long serialVersionUID = 636111385397748769L;
private Long id;
private String name;
private Set<Item> items = new TreeSet<Item>();
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public String getName() {
return name;
}
@OneToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE,
CascadeType.REMOVE }, fetch = FetchType.EAGER, mappedBy =
"holder")
@org.hibernate.annotations.Cascade(value =
org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
public Set<Item> getItems() {
return items;
}
// setters... compareTo, toString, ...
}
/*******************************************************************************/
@Entity
public class Item extends BaseObject implements Serializable,
Comparable<Item> {
private static final long serialVersionUID = -8012390283090108620L;
private Long id;
private String itemName;
private ItemHolder holder;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public String getItemName() {
return itemName;
}
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "itemholder_id", nullable = false)
public ItemHolder getHolder() {
return holder;
}
// setters... compareTo, toString, ...
}
On Wed, May 20, 2009 at 10:43 AM, Mauricio Ferreyra <[email protected]>wrote:
> Hi all,
>
> I've a problem mapping objects in Hibernate. The problem is that when I
> mapped a List on a object the result is multiplied as size of array.
>
> Example:
>
> public class ClassThatContainsList{
>
> @OneToMany(mappedBy="classThatContainsLis",fetch=FetchType.EAGER,cascade={CascadeType.ALL})
> private List<AObject> objectsList;
>
> }
>
> public class AObject{
> @ManyToOne
> private ClassThatContainsList classThatContainsList;
> }
>
> When I get a object of type ClassThatContainsList the result is multiplied
> as size of array.
>
> I don't want do the relation LAZY because the performance is low.
>
> What I can do?
>
>
>
>
