Fwiw Mathias, here is a model class that I like to use in the project I work
on:
/**
* LDM for domain objects. Detaches (nulls) object after each request.
*/
public class DomainObjectModel<T extends DomainObject>
extendsLoadableDetachableModel {
@SpringBean
private GenericHibernateDao dao;
private final Class<T> domainClass;
private final Long id;
/**
* Construct with class and id; next invocation will trigger loading the
* object with the id.
*
* @param domainClass
* @param id
*/
public DomainObjectModel(Class<T> domainClass, Long id) {
if (domainClass == null) {
throw new IllegalArgumentException("domainClass may not be null");
}
if (id == null) {
throw new IllegalArgumentException("id may not be null");
}
SpringInjector.injectDependencies(this);
this.domainClass = domainClass;
this.id = id;
}
/**
* Construct with domain object instance, which will be reused for the
* current request.
*
* @param domainObject
*/
@SuppressWarnings("unchecked")
public DomainObjectModel(T domainObject) {
super(domainObject);
if (domainObject == null) {
throw new IllegalArgumentException("domainObject may not be null");
}
SpringInjector.injectDependencies(this);
this.domainClass = (Class<T>)
HibernateProxyHelper.getClassWithoutInitializingProxy(domainObject);
this.id = domainObject.getId();
}
@Override
public boolean equals(Object obj) {
return Objects.equal(obj, getObject());
}
@Override
public int hashCode() {
return Objects.hashCode(getObject());
}
/**
* @see org.apache.wicket.model.LoadableDetachableModel#load()
*/
@Override
protected Object load() {
return dao.load(domainClass, id);
}
@SuppressWarnings("unchecked")
@Override
public T getObject() {
return (T) super.getObject();
}
}
Where DomainObject is:
/**
* Should be implemented by all normal domain objects.
*/
public interface DomainObject extends Serializable {
/**
* @return The id of the domain object
*/
Long getId();
}
Might not be what you want, but it is probably a good idea to make such a
model class that you can reuse throughout your project(s).
Probably also can be improved with Wicket 1.4, but I didn't get to look at
that yet :-)
Eelco
On Sun, May 4, 2008 at 10:11 AM, Igor Vaynberg <[EMAIL PROTECTED]>
wrote:
> you still have something misconfigured or you are not using detachable
> models where you should. ive built plenty of hibernate+spring+wicket
> apps to know that it works just fine and is pretty easy to do. if you
> want you can post a quickstart that demonstrates your problem and
> someone might be able to help you.
>
> -igor
>
>
> On Sun, May 4, 2008 at 10:01 AM, Mathias P.W Nilsson
> <[EMAIL PROTECTED]> wrote:
> >
> > I have session in view filter but still gets LazyLoadingException even
> if I
> > use detached models! Ahhh...
> >
> > Solved it temporarily by using Eager fetch but this is going to end up
> bad
> > if everything is eager.
> > --
> > View this message in context:
> http://www.nabble.com/How-to-avoid-Lazy-loading-exception-tp17040941p17048739.html
> >
> >
> > Sent from the Wicket - User mailing list archive at Nabble.com.
> >
> >
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