How do I map a Map using JPA?

Question

Let's say I have a domain object with the following field:

private Map<StatType, Double> maxValues = new HashMap<StatType, Double>();

StatType is an Java enum.

How do I map this using JPA?

Somewhat similar: http://stackoverflow.com/questions/853076/jpa-mapstring-string-mapping Does it solve your problem? — zeller, Sep 12 '12 at 07:04
Because a map should be a mapping between two columns/tables. Now I think I understand what you really want, but I don't know if it is possible to map single column to a java `Map`. — zeller, Sep 12 '12 at 07:15

score 3 · Accepted Answer · edited May 23 '17 at 11:49

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Another post that maybe helps: Storing a Map<String,String> using JPA. This solves the intra-table column-to-column mapping. If you really want to store a Map in a single column, I guess the only possible solution is to store it as a @Lob. An other SO post that describes this, though, in Hibernate: How to persist a HashMap with hibernate

edited May 23 '17 at 11:49

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answered Sep 12 '12 at 07:58

zeller

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How do I map a Map using JPA?

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