The editor doesn't seem to be able to handle some valid annotation elements.

When creating Java Persistence entities, the relationship annotations
(@OneToMany, @ManyToMany, etc.) have a cascade element. Setting the cascade
element in the relationship annotation causes a "cannot find symbol" error for
the in the editor.

For example in:
@OneToMany(cascade=REMOVE, mappedBy="order")
public Collection<LineItem> getLineItems() {
    return lineItems;
}

The first line causes an editor syntax error, with the following error in the popup:
cannot find symbol
symbol: variable REMOVE
location: <source file name>

From the EJB Persistence spec:
"The cascade element specifies the set of cascadable operations that are
propagated to the associated
entity. The operations that are cascadable are defined by the CascadeType enum:
public enum CascadeType { ALL, PERSIST, MERGE, REMOVE, REFRESH};"