Lazy polymorphic relations possible?

[scraatz]

Hi,

we have an entity which has a many-to-one property that references a polymorphic entity.

 @ManyToOne(cascade = {CascadeType.MERGE}, fetch = FetchType.EAGER) // EAGER
 @JoinColumn(name = "wle_mbtid", unique = false, nullable = true, insertable = true, updatable = true)
 public Musterbestandteil getMusterbestandteil() {
 return this.musterbestandteil;
 }

The Musterbestandteil class is the base class for several sub-classes. When I load the property eagerly everything works as expected, but when it is lazily loaded "instanceof" does not work because the property is some CGLIBxxx class.

Is there a way around this or do I have to load polymorphic relations eagerly. That would lead into trouble with entities that have more than one polymorphic x-to-many relations.

Thanks
Stefan

[vgarmash]

To work with lazy loaded polymorphic entity you need to implement ProxyVisitorPattern http://community.jboss.org/wiki/ProxyVisitorPattern