ImmutablePropertiesConstraint.php

<?php

declare (strict_types=1);
namespace Drupal\Core\Entity\Plugin\Validation\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Validation\Attribute\Constraint;
use Symfony\Component\Validator\Constraint as SymfonyConstraint;

/**
 * Checks if config entity properties have been changed.
 */
class ImmutablePropertiesConstraint extends SymfonyConstraint {
    
    /**
     * The error message if an immutable property has been changed.
     *
     * @var string
     */
    public string $message = "The '@name' property cannot be changed.";
    
    /**
     * The names of the immutable properties.
     *
     * @var string[]
     */
    public array $properties = [];
    
    /**
     * {@inheritdoc}
     */
    public function getDefaultOption() : ?string {
        return 'properties';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getRequiredOptions() : array {
        return [
            'properties',
        ];
    }

}