function validate()
{
if(!$result = parent :: validate())
return $result;
$ids = $this->dataspace->get('ids', array());
$new_parent_node_id = $this->dataspace->get('parent_node_id');
if(!sizeof($ids))
return false;
$objects = $this->_get_objects_to_move(array_keys($ids));
$tree =& tree :: instance();
foreach($objects as $id => $item)
{
$site_object =& wrap_with_site_object($item);
if(!$tree->can_move_tree($site_object->get_node_id(), $new_parent_node_id))
{
$this->validator->add_error('parent_node_id', strings :: get('tree_move_recursion_error', 'error'));
return false;
}
}
return true;
}