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At the moment, you need to specify the table name when using a map that uses a join table Given: @Entity public class EnumKeyHolder { @GeneratedValue @Id private int id; @OneToMany( cascade=CascadeType.ALL ) @MapKeyEnumerated(EnumType.STRING) @MapKeyColumn(name="mymapkeycolulmn") Map<MyEnum,EnumKeyProperty> properties = new HashMap<MyEnum,EnumKeyProperty>(); ... And public enum MyEnum{ VALUE1( "value1" ), // default VALUE2( "value2" ) ... @Entity public class EnumKeyProperty { @Id private int myKey; private int myValue; The following code will not put a value in the table for the map key: public static void main(String[] args) { EntityManagerFactory emf = Persistence.createEntityManagerFactory("TestEnumeratedMapKey"); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); EnumKeyHolder holder = new EnumKeyHolder(); EnumKeyProperty prop = new EnumKeyProperty(); prop.setMyKey(23); prop.setMyValue(22); holder.getProperties().put(MyEnum.VALUE1, prop); em.persist(holder); em.persist(prop); em.getTransaction().commit(); }
Workaround: Specify the table: @OneToMany( cascade=CascadeType.ALL ) @MapKeyEnumerated(EnumType.STRING) @MapKeyColumn(table="ENUMKEYHOLDER_ENUMKEYPROPERTY", name="mymapkeycolulmn") Map<MyEnum,EnumKeyProperty> properties = new HashMap<MyEnum,EnumKeyProperty>(); Possible fix: OneToManyAccessor.processManyToManyMapping() Move the processJoinTable call earlier in the method like this: protected void processManyToManyMapping() { // Create a M-M mapping and process common collection mapping metadata // first followed by specific metadata. ManyToManyMapping mapping = new ManyToManyMapping(); // Process the JoinTable metadata. processJoinTable(mapping, mapping.getRelationTableMechanism(), getJoinTableMetadata()); process(mapping); // 266912: If this 1:n accessor is different than the n:n mapping - track this mapping.setDefinedAsOneToManyMapping(true); }
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The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink
