Question

What is the JPA equivalent to Hibernate’s foreign id generator?

<id column="PERSON_ID" name="id" type="java.lang.Long">
   <generator class="foreign">
      <param name="property">person</param>
   </generator>
</id>

Answer 1

AFAIK , JPA specification does not standardize the foreign ID generator . You have to programmatically set the PK value correctly before saving this instance.

As for Hibernate , it has an extension annotation to enable foreign ID generator . You may choose to use it if you don’t mind:

  @Id
  @GeneratedValue(generator = "myForeignGenerator")
  @org.hibernate.annotations.GenericGenerator(
        name = "myForeignGenerator",
        strategy = "foreign",
        parameters = @Parameter(name = "property", value = "person")
  )
  @Column(name = "PERSON_ID")
  private Long id;