/**
* Extend magic add-method. Add $collection if given; otherwise
* create.
*
* @param Opus_Collection $collection (optional) collection object to add
*
* @return Opus_Collection
*/
public function addRootCollection($collection = null)
{
if (isset($collection)) {
$collection = parent::addRootCollection($collection);
} else {
$collection = parent::addRootCollection();
}
if ($collection->isNewRecord() and !$this->isNewRecord()) {
$collection->setPositionKey('Root');
$collection->setRoleId($this->getId());
}
return $collection;
}
