parsing numbers in input

["Ilja S." <il...@frontdesk.ee>]

Hi all
I have a form where user must enter a number - integer or double. 
Corresponding property of this field in actionForm is type of String.

I want user to be able to enter this number as normal number OR as 
localized number according to current Locale object (like 45,000,000.01 
or 45000000.01).
I could use a NumberFormat class in validate method to try to parse this 
  field.

Is this a normal practice at all to allow users to do this?

And why Validator framework has a date validation with pattern and has 
not number validation with pattern?

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Best Regards
Ilja


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