boolean function ( Class < ? > arg0 ) { return User . class . isAssignableFrom ( arg0 ) ; }
determines if the command object being submitted is a valid type concode_field_sep PersonValidator personValidator concode_elem_sep Log log concode_elem_sep Pattern EMAIL_PATTERN concode_field_sep boolean isUserNameAsEmailValid concode_elem_sep void validate concode_elem_sep boolean isUserNameValid