Re: [hibernate-dev] [BV] Though about PatternValidator

If you want to allow the empty string you can start your regular expression with the 'empty' or operator '|', eg "|^.*foo.*$". Now the string can be empty or anything with foo in it. --Hardy On Wed, 24 Jun 2009 09:47:56 +0200, Alaa Mohsen <alaa.mohsen(a)egyptdc.com&gt; wrote: Hello All, > I just realized that PatternValidator checks if the String passed to it > is null or not before checking it's validity, but it doesn't check if the > String is empty. What if someone wants to put a regular expression > constraint on a non mandatory field, and the framework he uses sets this > empty field to an empty string? What do you think? >