Based on what I've read on this forum, which happens to be a very valuable resource of mine, I find this to be true (corerect me if I'm wrong and please excuse my fledgling knowledge of JSF):
You cannot use a validator to do null value validation on a field, because JSF doesn't call the validator if there is no value to validate. As a result, you cannot print custom error messages on the client, unless of course you validate in the backing bean. -- View this message in context: http://www.nabble.com/So-let-me-get-this-straight....-tf2507926.html#a6993052 Sent from the MyFaces - Users mailing list archive at Nabble.com.

