55 lines
1.3 KiB
PHP
55 lines
1.3 KiB
PHP
<?php
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declare(strict_types = 1);
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namespace TYPO3\CMS\Install\Updates;
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/*
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* This file is part of the TYPO3 CMS project.
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*
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* It is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, either version 2
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* of the License, or any later version.
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*
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* For the full copyright and license information, please read the
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* LICENSE.txt file that was distributed with this source code.
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*
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* The TYPO3 project - inspiring people to share!
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*/
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use TYPO3\CMS\Core\Utility\GeneralUtility;
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class PrerequisiteCollection implements \IteratorAggregate
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{
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/**
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* @var \ArrayObject
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*/
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protected $prerequisites;
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public function __construct()
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{
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$this->prerequisites = new \ArrayObject();
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}
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/**
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* @param string $prerequisiteClass
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*/
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public function add(string $prerequisiteClass): void
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{
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if (
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!($this->prerequisites[$prerequisiteClass] ?? false)
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&& is_a($prerequisiteClass, PrerequisiteInterface::class, true)
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) {
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$this->prerequisites[$prerequisiteClass] = GeneralUtility::makeInstance(
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$prerequisiteClass
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);
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}
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}
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/**
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* @return \ArrayObject|\Traversable|PrerequisiteInterface[]
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*/
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public function getIterator()
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{
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return $this->prerequisites;
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}
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}
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