ExecutionContextFactory.php

<?php

namespace Drupal\Core\TypedData\Validation;

use Drupal\Core\Validation\TranslatorInterface;
use Symfony\Component\Validator\Context\ExecutionContextFactoryInterface;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;

/**
 * Defines an execution factory for the Typed Data validator.
 *
 * We do not use the factory provided by Symfony as it is marked internal.
 */
class ExecutionContextFactory implements ExecutionContextFactoryInterface {
    
    /**
     * @var \Drupal\Core\Validation\TranslatorInterface
     */
    protected $translator;
    
    /**
     * @var string|null
     */
    protected $translationDomain;
    
    /**
     * Constructs a new ExecutionContextFactory instance.
     *
     * @param \Drupal\Core\Validation\TranslatorInterface $translator
     *   The translator instance.
     * @param string $translationDomain
     *   (optional) The translation domain.
     */
    public function __construct(TranslatorInterface $translator, $translationDomain = NULL) {
        $this->translator = $translator;
        $this->translationDomain = $translationDomain;
    }
    
    /**
     * {@inheritdoc}
     */
    public function createContext(ValidatorInterface $validator, $root) : ExecutionContextInterface {
        return new ExecutionContext($validator, $root, $this->translator, $this->translationDomain);
    }

}