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<?php
/**
* This file is part of the ramsey/uuid library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Rfc4122;
use Ramsey\Uuid\Fields\FieldsInterface as BaseFieldsInterface;
use Ramsey\Uuid\Type\Hexadecimal;
/**
* RFC 4122 defines fields for a specific variant of UUID
*
* The fields of an RFC 4122 variant UUID are:
*
* * **time_low**: The low field of the timestamp, an unsigned 32-bit integer
* * **time_mid**: The middle field of the timestamp, an unsigned 16-bit integer
* * **time_hi_and_version**: The high field of the timestamp multiplexed with
* the version number, an unsigned 16-bit integer
* * **clock_seq_hi_and_reserved**: The high field of the clock sequence
* multiplexed with the variant, an unsigned 8-bit integer
* * **clock_seq_low**: The low field of the clock sequence, an unsigned
* 8-bit integer
* * **node**: The spatially unique node identifier, an unsigned 48-bit
* integer
*
* @link http://tools.ietf.org/html/rfc4122#section-4.1 RFC 4122, § 4.1: Format
*
* @psalm-immutable
*/
interface FieldsInterface extends BaseFieldsInterface
{
/**
* Returns the full 16-bit clock sequence, with the variant bits (two most
* significant bits) masked out
*/
public function getClockSeq(): Hexadecimal;
/**
* Returns the high field of the clock sequence multiplexed with the variant
*/
public function getClockSeqHiAndReserved(): Hexadecimal;
/**
* Returns the low field of the clock sequence
*/
public function getClockSeqLow(): Hexadecimal;
/**
* Returns the node field
*/
public function getNode(): Hexadecimal;
/**
* Returns the high field of the timestamp multiplexed with the version
*/
public function getTimeHiAndVersion(): Hexadecimal;
/**
* Returns the low field of the timestamp
*/
public function getTimeLow(): Hexadecimal;
/**
* Returns the middle field of the timestamp
*/
public function getTimeMid(): Hexadecimal;
/**
* Returns the full 60-bit timestamp, without the version
*/
public function getTimestamp(): Hexadecimal;
/**
* Returns the variant
*
* The variant number describes the layout of the UUID. The variant
* number has the following meaning:
*
* - 0 - Reserved for NCS backward compatibility
* - 2 - The RFC 4122 variant
* - 6 - Reserved, Microsoft Corporation backward compatibility
* - 7 - Reserved for future definition
*
* For RFC 4122 variant UUIDs, this value should always be the integer `2`.
*
* @link http://tools.ietf.org/html/rfc4122#section-4.1.1 RFC 4122, § 4.1.1: Variant
*/
public function getVariant(): int;
/**
* Returns the version
*
* The version number describes how the UUID was generated and has the
* following meaning:
*
* 1. Time-based UUID
* 2. DCE security UUID
* 3. Name-based UUID hashed with MD5
* 4. Randomly generated UUID
* 5. Name-based UUID hashed with SHA-1
*
* This returns `null` if the UUID is not an RFC 4122 variant, since version
* is only meaningful for this variant.
*
* @link http://tools.ietf.org/html/rfc4122#section-4.1.3 RFC 4122, § 4.1.3: Version
*/
public function getVersion(): ?int;
/**
* Returns true if these fields represent a nil UUID
*
* The nil UUID is special form of UUID that is specified to have all 128
* bits set to zero.
*/
public function isNil(): bool;
}
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