How to add a Map> in an entity class?

Question

I would like to add a mapping like

Map<String, List<String>> attributes;

I have used already @MapKeyColumn for other situation, but here I do have a key/value table where a key might occur several time.

How would you solve this? Is there any (JPA built-in) solution for that kind of problem domain?

Thank you for your response!

If you don't find any solution, just make a custom class, which has the attributes "name" and "List" — Tobi, Apr 24 '12 at 08:02
Thank you :-) I do have a custom class which represent an attribute. It's a list of these objects within my entity. A Map would just be more convenient. — Thomas, Apr 24 '12 at 08:22

score 2 · Accepted Answer · answered Apr 24 '12 at 13:39

2

There is no direct way. You need to create a class to represent the association or perform some sort of conversion in get/set methods.

See,

answered Apr 24 '12 at 13:39

James

1 Answers1