toString method

@override String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Implementation

@override
String toString() {
  String paddedHex(int num) {
    final text = num.toRadixString(16);
    return text.length < 2 ? "0$text" : text;
  }

  final buffer = StringBuffer();
  final groupLength = [4, 2, 2, 2, 6];
  var group = 0, inGroupOffset = 0;
  for (final octet in data) {
    if (group < groupLength.length && inGroupOffset >= groupLength[group]) {
      buffer.write("-");
      group += 1;
      inGroupOffset = 0;
    }
    buffer.write(paddedHex(octet));
    inGroupOffset += 1;
  }
  return buffer.toString();
}