/**
* Get the recursive iterator
*
* @param integer $max_level The maximum allowed level. 0 is used for any level
* @param integer $parent The key of the parent to start recursing from. 0 is used for the top level
* @return DatabaseIteratorRecursive
* @throws \OutOfBoundsException If a parent key is specified that doesn't exist.
*/
public function getRecursiveIterator($max_level = 0, $parent = 0)
{
if ($parent > 0 && !$this->__nodes->find($parent)) {
throw new \OutOfBoundsException('Parent does not exist');
}
//If the parent doesn't have any children create an empty rowset
if (isset($this->__children[$parent])) {
$config = array('data' => $this->__children[$parent]);
} else {
$config = array();
}
$iterator = new DatabaseIteratorRecursive($this->getTable()->createRowset($config), $max_level);
return $iterator;
}
/**
* Create a recursive iterator from a rowset
*
* @param DatabaseRowsetInterface $rowset
* @return \RecursiveIterator
*/
protected static function _createInnerIterator(DatabaseRowsetInterface $rowset)
{
$iterator = new \RecursiveArrayIterator($rowset->getIterator());
$iterator = new \RecursiveCachingIterator($iterator, \CachingIterator::TOSTRING_USE_KEY);
return $iterator;
}
