getTextValidator static method

FormFieldValidator<String> getTextValidator(String error_text, FormFieldValidator<String>? validator)

Implementation

static FormFieldValidator<String> getTextValidator(String error_text, FormFieldValidator<String>? validator) {

  //check found
  if ( validator != null ) {
    return validator;
  }

  //default
  return ( textValidator) {
    if ( textValidator == null || textValidator.isEmpty) {
      return error_text;
    }
    return null;
  };
}