public function init($streamWrapper = self::STREAM_WRAPPER_TEMP, $maxMemory = 5242880)
{
// weather we've already set a filename open the input stream
if ($tmpFilename = $this->getTmpFilename()) {
if (!($this->inputStream = fopen($tmpFilename, 'r+'))) {
throw new \Exception(sprintf('Can\'t open input temporary filename %s', $tmpFilename));
}
} else {
if (!($this->inputStream = fopen($streamWrapper . '/maxmemory:' . $maxMemory, 'r+'))) {
throw new \Exception(sprintf('Can\'t open stream wrapper %s', $streamWrapper));
}
}
}