Description Daryl Davis 2011-05-05 15:50:03 EDT

Build Identifier: EclipseLink 2.2.0 (JDK 1.6.24)

An Entity Class has the following property defined
...
    @OneToMany
    @JoinTable(name="DETAILS",
        joinColumns= @JoinColumn(name="DEC_ID"), 
        inverseJoinColumns=@JoinColumn(name="CONN_ID"))
    @MapKeyColumn(name="CHOICEID", length=25)
    Map<String, DetailObject> connections = new HashMap<String, DetailObject>(); 
...
NOTE: Unidirectional mapping... there is not a ManyToOne property defined in DetailObject entity

The TABLE get created correctly, but only the DEC_ID and CONN_ID columns ever get filled with data... I checked did some trouble shooting and the database update only includes the joinColumns ignoring the MapKeyColumn (The HashMaps key) like so:

--- INSERT INTO DETAILS (DEC_ID, CONN_ID) VALUES (?, ?) ---

I reconfigured the project to use OpenJPA, just for a comparative test, and it was updating the value correctly using HashMap property configured as above. 

Reproducible: Always

Steps to Reproduce:
1. Create an EntityA with a @OneToMany HashMap Property with <String, EntityB>
2. Fill the HashMap in EnityA with the <String, EntityB>
3. Persist the EntityA, only the two joinColumns are updated in the database.