setChecksum example

            if (array_key_exists('adapter', $adapter)) {
                $adapter = $adapter['adapter'];
            } else {
                throw new Zend_Validate_Exception("Missing option 'adapter'");
            }
        }

        $this->setAdapter($adapter, $options);
        if ($checksum !== null) {
            $this->setChecksum($checksum);
        }
    }

    /** * Returns the set adapter * * @return Zend_Validate_Barcode_BarcodeAdapter */
    public function getAdapter()
    {
        return $this->_adapter;
    }