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Asked: 2026-05-14T18:56:45+00:00

I’m trying to impose a @Oneto7 association. I’d have imagined an attribute that specifies

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I’m trying to impose a @Oneto7 association. I’d have imagined an attribute that specifies the target many value, but have found none.
If there is no such attribute, how else, in JPA/EclipseLink would one achieve it?

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1 Answer

  1. Editorial Team

    You could use the Bean Validation API (JSR-303) – Hibernate Validator being the RI – and add a Size constraint on your collection:

    @Size(min = 7, max = 7) protected Set<Foo> foos = new HashSet<Foo>();

    If you’re using JPA 1.0, have a look at this previous answer to see how to use Bean Validation with JPA 1.0.

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