Department.java

@Entity
@Table(name = AppTables.department)
public class Department {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = AppTables.departmentTable.id)
  private Long id;
  
  @Column(name = AppTables.departmentTable.name)
  private String name;
  
  @OneToOne(fetch = FetchType.EAGER)
  @JoinColumn(name = AppTables.departmentTable.departmentHead)
  private Employee departmentHead;
  // Getters and setters are omitted for brevity
}