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 buffer that will contains the error messages in string
  final buffer = StringBuffer();

  /// to extract failure message and build String object
  /// that will contain the full failure message
  ///
  for (int felidIndex = 0; felidIndex < keys.length; felidIndex++) {
    final currentFelid = keys[felidIndex];
    final errorBuffer = StringBuffer();
    errorBuffer.write(currentFelid);

    /// extract currentFelid messages
    for (int i = 0; i < _errors[currentFelid]!.length; i++) {
      final currentMessage = _errors[currentFelid];

      /// whether  is last msg in this key or not
      final isLastMsg = i == _errors.keys.length;

      /// append the message
      errorBuffer
          .write('$currentFelid $currentMessage${isLastMsg ? '\n' : ''}');
    }

    /// append the message
    buffer.write('$errorBuffer\n');
  }

  /// covert the buffer to string
  return buffer.toString();
}