Tomahawk Regular Expression Validator

Hi, I am trying to use the tomahawk regular expression validator in MyFaces. If I use the tag as shown below | it doesn't work and comes up with the validation message for all my input. However the same regular expression works perfectly fine with the String#matches in java. I want

regular expression validator

I am having a problem getting the regular expression validator to work correctly. I have the following in my JSP When I submit my form after entering 1234 in my textfield, I get the message "empId": Value is not valid. Am I doing something wron