protected function _fetch($check)
{
$this->valid = parent::_fetch($check);
if (!$check || $this->valid) {
$current = $this->current();
if ($this->flags & self::CALL_TOSTRING) {
if (is_object($current)) {
$this->strValue = $current->__toString();
} else {
$this->strValue = (string) $current;
}
} else {
if ($this->flags & self::TOSTRING_USE_INNER) {
$this->strValue = $this->getInnerIterator()->__toString();
}
}
if ($this->fullCacheIterator) {
$this->fullCacheIterator->offsetSet($this->key(), $current);
}
}
return $this->valid;
}