/**
* Extracts path-selected subset from set for read access.
*
* Using $default is provided since NULL might be a valid result, too.
*
* @throws \UnexpectedValueException on trying to descend into leaf node
*
* @param string $path pathname to subset
* @param type|array $default default to use
* @return mixed found subset, $default on missing
*/
public function read($path, $default = null)
{
if (is_array($default)) {
$default = $this->filterByType($default, false);
} else {
if (!is_null($default) && !$this->isMatchingType($default)) {
throw new \InvalidArgumentException('invalid type of default value');
}
}
return parent::read($path, $default);
}