PolymorphicTest.java

PolymorphicTest.java

static class Person {
    @Id
    private Long id;

    @Embedded(polymorphic = true)
    private State state;
  }

static class State {
  private String value;

  @SuppressWarnings("unused")
  State() {

  }

  public State(String value) {
    this.value = value;
  }
}
  
static class Active extends State {

  public Active() {
    super("Active");
  }
}
  
static class Terminated extends State {

  public Terminated() {
    super("Terminated");
  }

}

@Test
public void usingPolymorphicEmbeddedObject() {
  Person person = new Person();
  person.state = new Terminated();

  ObjectDatastore datastore = new AnnotationObjectDatastore();
  datastore.store().instance(person).now();
    
  datastore.disassociateAll();

  person = datastore.load().type(Person.class).id(person.id).now();

  assertThat(person.state,is(instanceOf(Terminated.class)));
}