private function process(Pap_Contexts_Action $context) {
$currencyCode = $context->getCurrencyFromRequest();
if ($currencyCode == '') {
throw new Gpf_Exception('Currency code is not defined');
}
if ($currencyCode == $context->getDefaultCurrencyObject()->getName()) {
throw new Gpf_Exception('Currency is the same as default currency');
}
$currency = new Gpf_Db_Currency();
try {
$currency = $currency->findCurrencyByCode($currencyCode);
} catch (Gpf_DbEngine_NoRowException $e) {
throw new Gpf_Exception('Currency does not exist');
}
return $currency;
}