[news.eclipse.rt.eclipselink] Re: How to use @BasicMap for a HashMap who

[kimppal@xxxxxxxxx ( Kim L)]

I tried what you suggested, but got this error message

Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence 
Services - 2.0.0.r3652-M1): 
org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [interface java.util.Map] for the 
attribute [myMap] on the entity class [class MyAClass] is not a valid type 
for a serialized mapping. The attribute type must implement the 
Serializable interface.

The wiki page about error references was a bit cryptic

ECLIPSELINK-07155: The type [{1}] for the attribute [{0}] on the entity 
class [{2}] is not a valid type for a serialized mapping. The attribute 
type must implement the Serializable interface.
   Cause: An annotation @AttributeOverride columns was not specified on a 
mapping mapping from entity class ClassName. 
   Action: Specify this annotation. 


Here what I have (yes, the key in the map is of same type as the class 
itself):


@Entity
class MyAClass {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  protected Long id;

  @CollectionTable(name = "MYACLASS_DEPENDENCIES", joinColumns = 
@JoinColumn(name = "MYACLASS"))
  @Column(name = "REQ_LEVEL")
  @MapKeyJoinColumn(name = "MYACLASS", referencedColumnName = "ID")
  private Map<MyAClass, Integer> myMap = new HashMap<MyAClass , 
Integer>();

}