Kotlin for Enterprise Applications using Java EE

Naming a join column

Since we bind a Contact  entity to a Person, we can choose to give a name to the joining column. The name that we specify here will be the foreign key reference in the target entity, which is the contacts table:

@Table(name = "person")@Entityclass Person : Identity() {    @Id    lateinit var identifier: UUID    lateinit var name: PersonName    lateinit var loginId: String    @Enumerated(EnumType.STRING)    var preferredLanguage: PreferredLanguage? = null    @OneToMany(cascade = arrayOf(CascadeType.ALL), fetch =      FetchType.LAZY)    @JoinColumn(name = "PERSON_ID")    lateinit var contact: List<ContactDetails>    lateinit var address: Address}

As the ContactDetails entity always refers to the Person entity with the PERSON_ID as foreign key, we can mark ...