JPA enum mapping by explicit getId()

[manuel aldana]

Hi,

for enum type you can choose EnumType.ORDINAL or EnumType.STRING. Going for string is definetely better because ordinal mandates that you never ever change the order of definition of the enum-types. On the other hand string also makes the DB entry bigger as necessary (taking the constant name, which can be quite long).

So I want to use an explicit mapping (that JPA uses getId() method).

   
public enum MyEnum
{
    //explicit id, we never want to rely on definition order (ordinals)
    FOO(0), BAR(1);

    private int index;

    private MyEnum(int index)
    {
        //To change body of created methods use File | Settings | File Templates.
        this.index = index;
    }

    //I want JPA to use this for mapping
    public int getId()
    {
        return index;
    }
}
 

How or is it possible with JPA to define a custom method of an java enum type?

thanks.