private void extendTrialExpirationByUser(TrialInstanceUpdateDto trialInstanceUpdateDto) {
User user = getTrialExtensionUser(trialInstanceUpdateDto);
if (user == null) {
throw new CSWebApplicationException(StringDefs.GENERAL_ERROR_CODE, "User does not exist!");
}
Product product = getTrialExtensionProduct(trialInstanceUpdateDto);
if (product == null) {
throw new CSWebApplicationException(StringDefs.GENERAL_ERROR_CODE, "Product does not exist!");
}
List<TrialInstance> trialInstances =
trialInstanceDao.findByUserAndProductVersion_Product(user, product);
extendTrialInstanceExpiration(trialInstances, trialInstanceUpdateDto);
}
