toString method
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() {
final result = StringBuffer();
result.write('<<\n');
result.write(' mode: ');
result.write(mode);
result.write('\n ecLevel: ');
result.write(ecLevel.toString().replaceFirst('ErrorCorrectionLevel.', ''));
result.write('\n version: ');
result.write(version);
result.write('\n maskPattern: ');
result.write(maskPattern);
if (matrix == null) {
result.write('\n matrix: null\n');
} else {
result.write('\n matrix:\n');
result.write(matrix);
}
result.write('>>\n');
return result.toString();
}