/**
* @param StreamInterface $stream Stream that is validated.
* @param HashInterface $hash Hash used to calculate the hash.
* @param string $expected The expected hash result.
* @param callable $onMismatch Optional function to invoke when there
* is a mismatch between the calculated hash and the expected hash.
* The callback is called with the resulting hash and the expected hash.
* This callback can be used to throw specific exceptions.
*/
public function __construct(StreamInterface $stream, HashInterface $hash, $expected, $onMismatch = null)
{
$this->mismatchCallback = $onMismatch;
$this->expected = $expected;
$that = $this;
parent::__construct($stream, $hash, function ($result) use($that) {
if ($that->expected !== $result) {
$that->mismatch($result);
}
});
}
