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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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/**
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 * This file is part of the ramsey/uuid library
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 *
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 * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
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 * @license http://opensource.org/licenses/MIT MIT
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 */
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declare(strict_types=1);
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namespace Ramsey\Uuid\Rfc4122;
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/**
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 * Provides common functionality for nil UUIDs
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 *
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 * The nil UUID is special form of UUID that is specified to have all 128 bits
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 * set to zero.
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 *
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 * @link https://tools.ietf.org/html/rfc4122#section-4.1.7 RFC 4122, § 4.1.7: Nil UUID
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 *
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 * @psalm-immutable
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 */
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trait NilTrait
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{
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    /**
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     * Returns the bytes that comprise the fields
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     */
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    abstract public function getBytes(): string;
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    /**
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     * Returns true if the byte string represents a nil UUID
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     */
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    public function isNil(): bool
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    {
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        return $this->getBytes() === "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
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    }
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}