TemplateEngineFactory.php

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<?php
namespace Magento\Framework\View;

use Magento\Framework\ObjectManagerInterface;

class TemplateEngineFactory
{
    protected $objectManager;

    protected $engines;

    public function __construct(ObjectManagerInterface $objectManager, array $engines)
    {
        $this->objectManager = $objectManager;
        $this->engines = $engines;
    }

    public function create($name)
    {
        if (!isset($this->engines[$name])) {
            throw new \InvalidArgumentException("Unknown template engine type: '{$name}'.");
        }
        $engineClass = $this->engines[$name];
        $engineInstance = $this->objectManager->create($engineClass);
        if (!$engineInstance instanceof \Magento\Framework\View\TemplateEngineInterface) {
            throw new \UnexpectedValueException("{$engineClass} has to implement the template engine interface.");
        }
        return $engineInstance;
    }
}