/**
* Attempts to get an ancestor node by the given id.
*
* @param int $id
* @return null|AbstractNode
*/
public function getAncestor($id)
{
if (!is_null($this->parent)) {
if ($this->parent->id() == $id) {
return $this->parent;
}
return $this->parent->getAncestor($id);
}
return null;
}
/**
* Sets the parent node.
*
* @param InnerNode $parent
* @return $this
* @throws CircularException
*/
public function setParent(InnerNode $parent)
{
// check integrity
if ($this->isDescendant($parent->id())) {
throw new CircularException('Can not add descendant "' . $parent->id() . '" as my parent.');
}
return parent::setParent($parent);
}
