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

[Gunnar Morling]

2013/1/21 Matt Benson <mbenson at apache.org>

>
> 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.
>

I'm confused, you say each object/constraint may only be validated once,
while Hardy said that during graph validation the same object/constraint
actually may be validated several times. So did you want to say you
*dis*agree with what Hardy said?

--Gunnar


>
>
> Matt
>
>
>> --Hardy
>>
>>
>>
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