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<?php
declare(strict_types=1);
namespace UMA\Uuid;
/**
* An UuidGenerator that returns sequential UUIDs, starting
* from the NIL Uuid and going up. This can be useful in a unit testing
* context, where deterministic and easily readable UUIDs might be a boon.
*
* Note that only the lowest 64 bits of the UUID are incremented. That should
* be enough, though.
* Don't use this one in production.
*/
class SequentialGenerator implements UuidGenerator
{
* @var int
private $counter;
* @var string
private $head;
* @example $mark = 15 and $start = 10 will generate:
* '00000000-0000-000f-0000-00000000000a'
* '00000000-0000-000f-0000-00000000000b'
* '00000000-0000-000f-0000-00000000000c'
* ...
public function __construct(int $mark = 0, int $start = 0)
$this->head = \pack('J', $mark);
$this->counter = $start;
}
* {@inheritdoc}
public function generate(string $name = null): Uuid
return Uuid::fromBytes($this->head . \pack('J', $this->counter++));
1ma /
uuid
