public function rewind()
{
$this->iterator = new \ArrayIterator();
if (is_null($this->offset)) {
if ($this->direction == KeyReader::DIRECTION_BACKWARD) {
$this->setOffset($this->index->getFile()->getFileSize() - 1);
} else {
$this->setOffset(0);
}
}
}
/**
* Returns the length of one read operation
*
* @return int
*/
public function getReadLength()
{
return $this->index->getFile()->getBlockSize() * $this->readBlockCount;
}