Description
Validates a string field using a regular expression.
Parameters
- fieldName - The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required
 - regexp - The RegExp expression
 - caseSensitive - Boolean (Optional). Sets whether the expression should be matched against in a case-sensitive way. Default is 
true. - trim - Boolean (Optional). Sets whether the expression should be trimmed before matching. Default is 
true. - regexExpression - String (Optional). Defines regExp expression as an OGNL expression - will be evaluated to String
 - caseSensitiveExpression - String (Optional). Defines caseSensitive param as an OGNL expression - will be evaluated to Boolean.
 - trimExpression - String (Optional). Defines trim param as an OGNL expression - will be evaluated to Boolean
 
You can mix normal params with expression aware params but thus was not tested
Examples