EntityTestEntityLevelValidator.php in Drupal 10        
                          
                  
                        
  
  
  
  
File
  core/modules/system/tests/modules/entity_test/src/Plugin/Validation/Constraint/EntityTestEntityLevelValidator.php
  
    View source  
  <?php
namespace Drupal\entity_test\Plugin\Validation\Constraint;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
class EntityTestEntityLevelValidator extends ConstraintValidator {
  
  protected $context;
  
  public function validate($value, Constraint $constraint) {
    if ($value->name->value === 'entity-level-violation') {
      $this->context
        ->buildViolation($constraint->message)
        ->addViolation();
    }
    if ($value->name->value === 'entity-level-violation-with-path') {
      $this->context
        ->buildViolation($constraint->message)
        ->atPath('test.form.element')
        ->addViolation();
    }
  }
}