how to not inherit some or all parent persistence attributes

Question

As shown below, i have the object Car with 2 persistence attributes:

public  class Car {

@Column(name = "COLOR")
protected String color;

@Column(name = "BRAND")
protected String brand;
}

All objects that extends from Car use the 2 attributes, but in some the them, i want to exclude one or all attributes. For example:

public  class SpecialCar extends Car{
    //how to tell here that i don't want to have Brand column

}

Thx for help

Well, I don't know if that's possible coz if anything is `protected`or `public` or has no modifier, then it **will** be inherited. If something is `private` it is **not** inherited. — Hungry Blue Dev, Jan 12 '14 at 16:35
You should check out the @AttributeOverride annotation from hibernate. e.g. as used in: http://viralpatel.net/blogs/hibernate-inheritance-table-per-concrete-class-annotation-xml-mapping/ — Ben, Jan 12 '14 at 16:37
Don't do that. If a `SpecialCar` extends a `Car`, then, for all that matters, it must behave as a `Car` (if a `Car` has brands, so it also must have). If you don't do like that, it is a violation to the [Liskov Substitution Principle](http://en.wikipedia.org/wiki/Liskov_substitution_principle) of OO software, which leads to complicated and hard to understand/maintain software. If you still want to have the `SpecialCar` being different, then I suggest using [composition instead of inheritance](http://en.wikipedia.org/wiki/Composition_over_inheritance). — acdcjunior, Jan 12 '14 at 17:25

score 0 · Answer 1 · answered Jan 12 '14 at 16:37

0

If you do not want it in SpecialCar then, to me, it means, it should not be in Car at all. Can't you simply remove it from Car?

answered Jan 12 '14 at 16:37

Eugene

score 0 · Answer 2 · edited May 23 '17 at 12:29

0

I think that this is answered allready here:

I also think that is not possible, but they give you a nice trick

edited May 23 '17 at 12:29

Community

answered Jan 12 '14 at 16:37

anquegi

2 Answers2