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Problem with @Digits

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cristiano.andrade

Post subject: Problem with @Digits

Posted: Mon Jul 27, 2009 3:10 pm

Newbie

Joined: Mon Jul 27, 2009 2:23 pm
Posts: 1

Hi,

I'm using hibernate validator for validate field with double precision and I tried to validate this value "0.001".

Example:

Code:

...
@Digits(integer=12,fraction=3)
private Double value = 0.001d;
..

I did some tests with the Double class and saw what toString method append one zero at final of number.

The code below explain it.

Code:

for (int i = 1; i <= 999; ++i) {  
String s = Double.valueOf (i / 1000.0).toString();  
if (s.length() > 5) {  
System.out.println (s);  
}  
}

result :

/*
0.0010
0.0010
0.0020
0.0030
0.0040
0.0050
0.0060
0.0070
0.0080
0.0090
 */

Mathematically, "0.001" is equal "0.0010", but the validator return false because "0.0010" has 4 fractional digits.

How can I solve this?

Thanks in advance!

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hardy.ferentschik

Post subject: Re: Problem with @Digits

Posted: Tue Jul 28, 2009 6:12 am

Hibernate Team

Joined: Thu Apr 05, 2007 5:52 am
Posts: 1689
Location: Sweden

Hmm, I guess the solution is to remove trailing '0's. In fact the dgit validator implementation of the legacy hibernate validator did exactly that.

I created an Jira issue HV-192 and applied the fixes on the trunk of Hibernate Validator. It will go into the next release.

If you need a solution right now, you can either use a snapshot of Hibernate Validator or you could use a custom constraint for now.

--Hardy

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