9.5/_extractor_registry_8php_source.html

<?php

namespace ‪TYPO3\CMS\Core\Resource\Index;


/*

 * This file is part of the TYPO3 CMS project.

 *

 * It is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, either version 2

 * of the License, or any later version.

 *

 * For the full copyright and license information, please read the

 * LICENSE.txt file that was distributed with this source code.

 *

 * The TYPO3 project - inspiring people to share!

 */


use ‪TYPO3\CMS\Core\SingletonInterface;

use ‪TYPO3\CMS\Core\Utility\GeneralUtility;


class ‪ExtractorRegistry implements ‪SingletonInterface

{

    protected ‪$extractors = [];


    protected ‪$instances;


    public static function ‪getInstance()

    {

        return GeneralUtility::makeInstance(self::class);

    }


    public function ‪registerExtractionService($className)

    {

        if (!class_exists($className)) {

            throw new \InvalidArgumentException('The class "' . $className . '" you are registering is not available', 1422705270);

        }

        if (!in_array(ExtractorInterface::class, class_implements($className))) {

            throw new \InvalidArgumentException('The extractor needs to implement the ExtractorInterface', 1422705271);

        }

        $this->extractors[] = $className;

    }


    public function ‪getExtractors()

    {

        if ($this->instances === null) {

            $this->instances = [];


            ‪$extractors = array_reverse($this->extractors);

            foreach (‪$extractors as $className) {

                $object = $this->‪createExtractorInstance($className);

                $this->instances[] = $object;

            }


            if (count($this->instances) > 1) {

                usort($this->instances, [$this, 'compareExtractorPriority']);

            }

        }

        return ‪$this->instances;

    }


    public function ‪getExtractorsWithDriverSupport($driverType)

    {

        $allExtractors = $this->‪getExtractors();


        $filteredExtractors = [];

        foreach ($allExtractors as $priority => $extractorObject) {

            if (empty($extractorObject->getDriverRestrictions())) {

                $filteredExtractors[$priority] = $extractorObject;

            } elseif (in_array($driverType, $extractorObject->getDriverRestrictions())) {

                $filteredExtractors[$priority] = $extractorObject;

            }

        }

        return $filteredExtractors;

    }


    protected function ‪compareExtractorPriority(‪ExtractorInterface $extractorA, ‪ExtractorInterface $extractorB)

    {

        return $extractorB->‪getPriority() - $extractorA->‪getPriority();

    }


    protected function ‪createExtractorInstance($className)

    {

        return GeneralUtility::makeInstance($className);

    }

}