[eclipselink-users] Internal ClassCastException in 2.1: @OrderBy not res

[Laird Nelson <ljnelson@xxxxxxxxx>]

I have an entity with a @OneToMany field.  It's mapped like this:

@OneToMany(cascade = { CascadeType.PERSIST, CascadeType.REMOVE },
mappedBy = "foo", targetEntity = BarEntity.class)
@OrderBy
private Collection<Bar> stuff;

I discovered that if I initialize this myself like this in, say, the
constructor:

this.stuff = new LinkedHashSet<Bar>();

...I get a class cast exception during persist that says:

java.lang.ClassCastException: java.util.LinkedHashSet cannot be cast
to java.util.List
	at org.eclipse.persistence.internal.queries.OrderedListContainerPolicy.iteratorFor(OrderedListContainerPolicy.java:429)
	at org.eclipse.persistence.mappings.CollectionMapping.cascadeRegisterNewIfRequired(CollectionMapping.java:369)
	at org.eclipse.persistence.internal.descriptors.ObjectBuilder.cascadeRegisterNewForCreate(ObjectBuilder.java:1684)
	at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectForPersist(UnitOfWorkImpl.java:4212)
	at org.eclipse.persistence.internal.jpa.EntityManagerImpl.persist(EntityManagerImpl.java:384)

Is there some section of the JPA 2.0 specification that says what
collection types are permitted?  Or that the kind of Collection
annotated by @OrderBy must be a List?  Is this pilot error or a bug?

Thanks,
Laird