/**
* Sets default ACL role(s) to use when iterating pages if not explicitly
* set later with {@link setRole()}
*
* @param midex $role [optional] role to set. Expects null,
* string, or an instance of
* {@link Zend_Acl_Role_Interface}.
* Default is null, which sets no default
* role.
* @return void
* @throws Exception\InvalidArgumentException if role is invalid
*/
public static function setDefaultRole($role = null)
{
if (null === $role || is_string($role) || $role instanceof Acl\Role) {
self::$_defaultRole = $role;
} else {
throw new Exception\InvalidArgumentException('$role must be null|string|Zend_Acl_Role_Interface');
}
}
