java shit

@NamedQuery(name="Employee.salaryLessThan", query="select e from Employee e where salary < :salary")
class Employee {
    Integer id;
    String name;
    Double salary;
}

------------------

EntityManager em;
TypedQuery<Employee> query = em.createNamedQuery("Employee.salaryLessThan", Employee.class);
query.setParameter("salary", salary);
List<Employee> result = query.getResultList();
em.close();
return result;


--------



class Publisher {
    @Id
    @GeneratedValue(strategy=GenerattionType.IDENTITY)
    Integer id;

    String name;
    String address;
    @OneToMany(cascade=CascadeType.PERSIST)
    List<Book> books;
}

class Book {
    @Id
    Integer id;

    String title;
    BigInteger price;
    @ManyToOne(mappedBy="books")
    publisher;
}