class IV_Doctrine_Base {
    /**
     * Role Definition
     */
    const ROLE_UNKNOWN          = 0;
    const ROLE_INMEMORIAM       = 100;
    const ROLE_SUSPENDED        = 200;
    const ROLE_INACTIVE         = 300;
    const ROLE_ACTIVE           = 400;
    const ROLE_SUPERVISOR       = 500;
    const ROLE_ADMINISTRATOR    = 600;

    /**
     * @var Doctrine\ORM\EntityManager
     */
    protected static $instance;

    public static function getRoles()
    {
        return array(
            'role_unknown' => self::ROLE_UNKNOWN,
            'role_inmemoriam' => self::ROLE_INMEMORIAM,
            'role_suspended' => self::ROLE_SUSPENDED,
            'role_inactive' => self::ROLE_INACTIVE,
            'role_active' => self::ROLE_ACTIVE,
            'role_supervisor' => self::ROLE_SUPERVISOR,
            'role_administrator' => self::ROLE_ADMINISTRATOR,
        );
    }