JPA-override annotation on SuperClass property

Question

I have SuperClass where I have defined my properties and I want to apply one more annotation on one of the SuperClass Property.

@MappedSuperclass
public class CartBaseEntity {
private String cartName;

@Column(name = "cart_name")
public String getCartName() {
    return cartName;
 }

public void setCartName(String cartName) {
    this.cartName = cartName;
 }
}

And my Sub Class is in below:

@Entity
@Table(name = "CART2")
public class CartEntity extends CartBaseEntity implements Serializable {

private Set<Items> items;

@Basic(fetch = FetchType.LAZY)
@Override
public String getCartName() {
    return super.getCartName(); 
  }
}

I was trying to override the 'cartName' column and want to add @Basic annotation on it. Is it possible or is there any workarround? TIA

Answer 1

Yes, it's possible with @AttributeOverride annotation applied to a subclass:

@Entity
@Table(name = "CART2")
@AttributeOverride(name = "cartName", column = @Column(name="CART_NAME"))
public class CartEntity extends CartBaseEntity implements Serializable {
    ...
}

---

UPDATE: here's what JPA 2.1 Specification tells about overriding a column in a mapped superclass:

11.1.4 AttributeOverride Annotation

The AttributeOverride annotation is used to override the mapping of a Basic (whether explicit or default) property or field or Id property or field.

The AttributeOverride annotation may be applied to an entity that extends a mapped superclass or to an embedded field or property to override a Basic mapping or Id mapping defined by the mapped superclass or embeddable class (or embeddable class of one of its attributes).