Symfony\Component\Form\Util\PropertyPath::getElements PHP Method

    public function getElements()
    {
        return $this->elements;
    }

 /**
  * Validates the form and its domain object.
  *
  * @param FormInterface $form A FormInterface instance
  */
 public function validate(FormInterface $form)
 {
     if ($form->isRoot()) {
         $mapping = array();
         $forms = array();
         $this->buildFormPathMapping($form, $mapping);
         $this->buildDataPathMapping($form, $mapping);
         $this->buildNamePathMapping($form, $forms);
         $this->resolveMappingPlaceholders($mapping, $forms);
         // Validate the form in group "Default"
         // Validation of the data in the custom group is done by validateData(),
         // which is constrained by the Execute constraint
         if ($form->hasAttribute('validation_constraint')) {
             $violations = $this->validator->validateValue($form->getData(), $form->getAttribute('validation_constraint'), self::getFormValidationGroups($form));
             if ($violations) {
                 foreach ($violations as $violation) {
                     $propertyPath = new PropertyPath($violation->getPropertyPath());
                     $template = $violation->getMessageTemplate();
                     $parameters = $violation->getMessageParameters();
                     $error = new FormError($template, $parameters);
                     $child = $form;
                     foreach ($propertyPath->getElements() as $element) {
                         $children = $child->getChildren();
                         if (!isset($children[$element])) {
                             if ($form->isSynchronized()) {
                                 $form->addError($error);
                             }
                             break;
                         }
                         $child = $children[$element];
                     }
                     if ($child->isSynchronized()) {
                         $child->addError($error);
                     }
                 }
             }
         } elseif (count($violations = $this->validator->validate($form))) {
             foreach ($violations as $violation) {
                 $propertyPath = $violation->getPropertyPath();
                 $template = $violation->getMessageTemplate();
                 $parameters = $violation->getMessageParameters();
                 $error = new FormError($template, $parameters);
                 foreach ($mapping as $mappedPath => $child) {
                     if (preg_match($mappedPath, $propertyPath)) {
                         if ($child->isSynchronized()) {
                             $child->addError($error);
                         }
                         continue 2;
                     }
                 }
                 if ($form->isSynchronized()) {
                     $form->addError($error);
                 }
             }
         }
     }
 }