Re: [Springframework-rcp-dev] Best way for a special Constraint...

[Jan H. <jh...@sc...>]

Have you tried something like:

constraints.ifTrue(constraints.eq("X", ValueY),
constraints.not(constraints.present(Y)));

Maybe we should indeed add an AbsentIfTrue as an opposite of the
RequiredIfTrue.

Kind Regards,
Jan


On Fri, 2008-02-08 at 16:44 +0000, Benoit Xhenseval wrote:
> Hi All,
> 
>  
> 
> It is Friday afternoon and my brain is slowing down…  What would be
> the best way to say:
> 
>  
> 
> If Property X == ‘VAL_1’ then Property Y must be ABSENT/null
> 
> If Property X == ‘VAL_1’ then Property Z must be ABSENT/null
> 
> If Property X == ‘VAL_2’ then Property Y is required
> 
> If Property X == ‘VAL_3’ then Property Z is required
> 
>  
> 
> The last 2 are easy:
> 
> add(new RequiredIfTrue("Y", eq("X", “VAL_2”)));
> 
> add(new RequiredIfTrue("Z", eq("X", “VAL_3”)));
> 
>  
> 
> but something like AbsentIfTrue would be useful…
> 
> But how would you check for absence? Not(present(“Y”)) ?
> 
>  
> 
> Second question, is it possible to put a rule with a given regular
> expression (like ISIN which are 2 char followed by 9 numerics).
> 
>  
> 
> Many thanks,
> 
>  
> 
> Benoit
> 
>  
> 
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