OneToOne com lazy

A.java

@Entity
public class A implements Serializable {

	private static final long serialVersionUID = 1L;

	private Long id;
	
	private B b;

	@Id
	@GeneratedValue
	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}
	
	@PrimaryKeyJoinColumn
	@OneToOne(optional = false, fetch = FetchType.LAZY)
	public B getB() {
		return b;
	}

	public void setB(B b) {
		this.b = b;
	}
	
	// equals e hashCode

}

B.java

@Entity
public class B implements Serializable {

	private static final long serialVersionUID = 1L;

	private Long id;

	private A a;

	@Id
	@GeneratedValue
	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}
	
	@OneToOne(mappedBy = "b", optional = false, fetch = FetchType.LAZY)
	public A getA() {
		return a;
	}

	public void setA(A a) {
		this.a = a;
	}

  // equals e hashCode

}