/**
* Set parent for node (update parent children also). Should be called only once in lifetime of node!
* @param ARouteNode $parent
* @throws RouterException
*/
protected function setParent(ARouteNode $parent)
{
// only one leaf per node should be allowed. Parent can not be leaf
if ($parent->isLeaf()) {
throw new RouterException("Parent can not be leaf");
} else {
if ($this->isLeaf() && $parent->hasLeaf()) {
$message = "Only one leaf per node is allowed";
throw new RouterException($message);
}
}
$parent->children[] = $this;
}
