@Embeddable
public final class EntityState {

    public final static EntityState Active = new EntityState("ACTIVE");
    public final static EntityState Archived = new EntityState("ARCHIVED");

    private String state;

    private EntityState() {
    }

    private EntityState(String state) {
        this.state = state;
    }

    public String getState() {
        return state;
    }

    @Override
    public boolean equals(Object obj) {

        if (!(obj instanceof EntityState)) {
            return false;
        }

        EntityState state = (EntityState) obj;

        return state.getState().equals(this.getState());
    }

    @Override
    public int hashCode() {
        return state.hashCode();
    }

    @Override
    public String toString() {
        return state;
    }
}

    @Test
    @UsingDataSet("datasets/integration-test-data.json")
    public void constant_initialization_issue_test() {

        System.out.println("ACTIVE: " + EntityState.Active);      // - constants are initialized.
        System.out.println("ARCHIVED: " + EntityState.Archived);  // - both outputs correct respective values (ACTIVE and ARCHIVED).

        List<TestEntity> testEntity = testEntityRepository.findAll();

        System.out.println("ACTIVE: " + EntityState.Active);      // - both constants incorrectly output the same value (either ACTIVE or ARCHIVED).
        System.out.println("ARCHIVED: " + EntityState.Archived);  // - though constants had been initialized earlier.

        assertThat(testEntity).isNotNull().hasSize(2);
        assertThat(testEntity.get(1).getState().getState()).isEqualTo("ARCHIVED");
    }
}