Validator.php

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<?php
namespace Magento\Sales\Model;

use Magento\Framework\Exception\ConfigurationMismatchException;
use Magento\Framework\ObjectManagerInterface;

class Validator
{
    private $objectManager;

    private $validatorResultFactory;

    public function __construct(
        ObjectManagerInterface $objectManager,
        ValidatorResultInterfaceFactory $validatorResult
    ) {
        $this->objectManager = $objectManager;
        $this->validatorResultFactory = $validatorResult;
    }

    public function validate($entity, array $validators, $context = null)
    {
        $messages = [];
        $validatorArguments = [];
        if ($context !== null) {
            $validatorArguments['context'] = $context;
        }

        foreach ($validators as $validatorName) {
            $validator = $this->objectManager->create($validatorName, $validatorArguments);
            if (!$validator instanceof ValidatorInterface) {
                throw new ConfigurationMismatchException(
                    __('The "%1" validator is not an instance of the general validator interface.', $validatorName)
                );
            }
            $messages = array_merge($messages, $validator->validate($entity));
        }
        $validationResult = $this->validatorResultFactory->create();
        foreach ($messages as $message) {
            $validationResult->addMessage($message);
        }

        return $validationResult;
    }
}