ServiceLocator.php

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<?php
namespace Magento\Setup\Module\I18n;

use Magento\Framework\Component\ComponentRegistrar;

class ServiceLocator
{
    private static $_factory;

    private static $_context;

    private static $_dictionaryGenerator;

    private static $_packGenerator;

    public static function getDictionaryGenerator()
    {
        if (null === self::$_dictionaryGenerator) {
            $filesCollector = new FilesCollector();

            $phraseCollector = new Parser\Adapter\Php\Tokenizer\PhraseCollector(new Parser\Adapter\Php\Tokenizer());
            $adapters = [
                'php' => new Parser\Adapter\Php($phraseCollector),
                'html' => new Parser\Adapter\Html(),
                'js' => new Parser\Adapter\Js(),
                'xml' => new Parser\Adapter\Xml(),
            ];

            $parser = new Parser\Parser($filesCollector, self::_getFactory());
            $parserContextual = new Parser\Contextual($filesCollector, self::_getFactory(), self::_getContext());
            foreach ($adapters as $type => $adapter) {
                $parser->addAdapter($type, $adapter);
                $parserContextual->addAdapter($type, $adapter);
            }

            self::$_dictionaryGenerator = new Dictionary\Generator(
                $parser,
                $parserContextual,
                self::_getFactory(),
                new Dictionary\Options\ResolverFactory()
            );
        }
        return self::$_dictionaryGenerator;
    }

    public static function getPackGenerator()
    {
        if (null === self::$_packGenerator) {
            $dictionaryLoader = new Dictionary\Loader\File\Csv(self::_getFactory());
            $packWriter = new Pack\Writer\File\Csv(self::_getContext(), $dictionaryLoader, self::_getFactory());

            self::$_packGenerator = new Pack\Generator($dictionaryLoader, $packWriter, self::_getFactory());
        }
        return self::$_packGenerator;
    }

    private static function _getFactory()
    {
        if (null === self::$_factory) {
            self::$_factory = new \Magento\Setup\Module\I18n\Factory();
        }
        return self::$_factory;
    }

    private static function _getContext()
    {
        if (null === self::$_context) {
            self::$_context = new Context(new ComponentRegistrar());
        }
        return self::$_context;
    }
}