I have 2 tables as follows :
TABLE_A
-------
A_SIREN
A_NDA
TABLE_B
-------
B_id
B_NDA
B_SIREN
The id of table A is a COMPOSITE KEY SIREN/NDA
Here's the entities code.
Key class
@Embeddable
public class SirenNdaKey implements Serializable {
@Column(name = "A_SIREN")
protected String siren;
@Column(name = "A_NDA")
protected String nda;
// getters setters
}
TABLE A
public class EntityA{
@EmbeddedId
private SirenNdaKey sirenNda;
@OneToMany(fetch = FetchType.LAZY)
@PrimaryKeyJoinColumns({ @PrimaryKeyJoinColumn(name = "A_SIREN",
referencedColumnName = "B_SIREN"),
@PrimaryKeyJoinColumn(name = "A_NDA", referencedColumnName = "B_NDA")
})
private Set<EntityB> EntityBSet;
...
}
TABLE B
public class EntityB
@Id
private long id;
@Column(name = "B_SIREN")
private String siren;
@Column(name = "B_NDA")
private String nda;
}
Hibernate generate 3 tables : TABLE_A, TABLE_B and association table that contain A_NDA, A_SIREN, B_ID. How can I do to generate only 2 tables.
My objectif is to find a list of entityB associated to the same couple SIREN/NDA from entity A (entityA.getEntityBSet()) without the need of the association table, because my tables are supplied by external batch.
entityA = entityARepository.findOne(new SirenNdaKey("nda_test1", "siren_test1"));
entityA.getEntityBSet() // this list is always empty
This is the correct source code, I should use @JoinColumns instead of @PrimaryKeyJoinColumns
public class EntityA{
@EmbeddedId
private SirenNdaKey sirenNda;
@OneToMany(fetch = FetchType.LAZY)
@JoinColumns({ @JoinColumn(name = "B_SIREN",
referencedColumnName = "A_SIREN"),
@JoinColumn(name = "B_NDA", referencedColumnName = "A_NDA")
})
private Set<EntityB> EntityBSet;
...
}