[bv-dev] Legal to validate constraints more than once?

[Matt Benson]

On Mon, Jan 21, 2013 at 9:17 AM, Hardy Ferentschik <hardy at hibernate.org>wrote:

> On 21 Jan 2013, at 3:36 PM, Gunnar Morling <gunnar at hibernate.org> wrote:
>
> > I'm wondering whether it's legal that one constraint gets validated more
> than once during one validation operation. The spec seems a bit
> contradictory in this regard.
> >
> > In section 4.6 "Validation routine" [1] it says:
> >
> > "[...] this implies that a given validation constraint will not be
> processed more than once per validation."
> >
> > Section 4.6.1 "Object graph validation" says though:
> >
> > "[...] object graph navigation can lead to multiple validations of the
> same constraint and the same object instance but the set of constraint
> validation is deterministic and the algorithm prevents infinite loops."
> >
> > What is right here? Or is this to say that *only* during graph
> validation a constraint may be validated multiple times but not e.g. during
> validation of multiple groups, all of which a constraint is part of?
>
> If you are just validating a single bean every constraint can only be
> validated once. However, when you are dealing with object graphs a
> constraint can be validated once per path on which you reach it.
> So both sentences make sense in their context, but taken together there
> seems to be a contradiction. Maybe the first statement could just be
> removed?
>
>
My read of these sections yields an understanding that, during any
validation call, the same validated object/constraint pair must be
evaluated only once.  I seem to be in agreement with Hardy here.

Matt


> --Hardy
>
>
>
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