/**
* Append a field to the record.
*
* @see Record::append()
*
* @throws InvalidArgumentException Field level other than 0
* @throws InvalidArgumentException Field already in record
*
* @param Field $field Field to append
* @return void
*/
public function append(Field $field)
{
if ($field->getLevel() !== 0) {
throw new InvalidArgumentException("Invalid field level {$field->getLevel()}");
}
return parent::append($field);
}
/**
* Append a field to the copy record.
*
* You can only append field of level 2 to a copy record.
*
* @see Record::append()
*
* @throws InvalidArgumentException Field level other than 2
* @throws InvalidArgumentException Item number mismatch
* @throws InvalidArgumentException Field already in record
*
* @param Field $field Field to append
* @return void
*/
public function append(Field $field)
{
if ($field->getLevel() !== 2) {
throw new InvalidArgumentException("Invalid field level: {$field->getLevel()}");
}
if ($this->getItemNumber() === null) {
$this->setItemNumber($field->getOccurrence());
}
if ($field->getOccurrence() != $this->getItemNumber()) {
throw new InvalidArgumentException("Item number mismatch: {$this->getItemNumber()}, {$field->getOccurrence()}");
}
return parent::append($field);
}