public void validateMerchant(Merchant merchant) throws Exception {
StringBuilder errorList = new StringBuilder();
if (merchant == null) {
errorList.append("Please provide merchant details!");
} else if (merchant.getPassword() == null) {
errorList.append("Please provide merchant's password");
} else if (merchant.getIdentifier() == null) {
errorList.append("Please provide merchant's identifier");
}
if (errorList.length() > 0) {
throw new Exception(errorList.toString());
}
}
private void authenticateMerchant(MerchantOrder order) throws Exception {
Merchant merchant = order.getMerchant();
StringBuilder errorList = new StringBuilder();
validateMerchant(merchant);
Merchant dbMerchant = merchantService.getByIdentifier(merchant.getIdentifier());
if (dbMerchant == null) {
errorList.append("Merchant with provided identifier does not exist!");
} else if (!merchant.getPassword().equals(dbMerchant.getPassword())) {
errorList.append("Invalid password");
}
merchant.setId(dbMerchant.getId());
if (errorList.length() > 0) {
throw new Exception(errorList.toString());
}
}