validate method

@override bool validate(dynamic data)

Validates the provided data against this rule.

Returns true if the data is valid, false otherwise. Subclasses must implement this method.

Implementation

@override
bool validate(data) {
  RegExp regExp = RegExp(r'(^[0-9]{4}?[0-9]$|^[0-9]{4}?[0-9]-[0-9]{4}$)');
  return regExp.hasMatch(data.toString());
}