I agree with your analysis, but @MapKeyTarget vs @o.h.a.MapKey / @o.h.a.MapKeyManyToMany enhancement with target is not influenced by the @j.p.MapKey design flaws.

Pros of each solution are
1. @MapKeyTarget
SoC (Relational descriptions are split from Object descriptions in annotations)
@Target and @MapKeyTarget are consistent

2. no @MapKeyTarget
No extra @MapKeyTarget annotation



Christian Bauer wrote:

On Nov 29, 2006, at 9:23 PM, Emmanuel Bernard wrote:

Note that I hope the future spec will hopefully handle all cases nicely (ie add a targetElement in @Embedded), @MapKey should go to back the drawing board from a spec POV so we can think of something clean from the begining.

I'm for 2., because @javax.persistence.MapKey is really completely useless and has to be redesigned (looks like a legacy case that one of the EG members had and thought that it would be useful). So enhance @org.hibernate.annotations.MapKey and create a @Target that works for @Embedded.

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