All is in the question. How to map a Map with Hibernate using annotations ?
And what’s the associated database structure ?
All is in the question. How to map a Map with Hibernate using annotations
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All is in the question. How to map a Map with Hibernate using annotations ?
And what’s the associated database structure ?
You are probably looking for a generic key-value database structure where values can have multiple types. This is typically resolved by having some sort of abstract
Valueclass with key attribute and several subclasses, each for every desired type:Now you use:
Of course this approach has many disadvantages, correctly choosing inheritance strategy being one of them (it depends on how many different types you want to store). But at least it is perfectly type-safe.
I don’t have any experience with NHibernate, but with Hibernate (see: How do you map a "Map" in hibernate using annotations?) you can map
Mapdirectly.