/**
* {@inheritdoc}
*
* @throws InvalidMARCspecException
*/
public function addSubfields($subfields)
{
if ($subfields instanceof SubfieldInterface) {
$this->subfields[] = $subfields;
} else {
$this->checkIfString($subfields);
if (2 > strlen($subfields)) {
throw new InvalidMARCspecException(InvalidMARCspecException::SF . InvalidMARCspecException::LENGTH . InvalidSubfieldspecException::MINIMUM2, $subfields);
}
if ('$' !== $subfields[0]) {
throw new InvalidMARCspecException(InvalidMARCspecException::SF . InvalidSubfieldspecException::PREFIX, $subfields);
}
$parser = new MARCspecParser();
$_subfieldSpecs = $parser->matchSubfields($subfields);
foreach ($_subfieldSpecs as $subfieldSpec) {
$this->addSubfield($subfieldSpec);
}
}
}
