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package com.example.spring.bank.account;
import java.math.BigDecimal;
import java.util.Iterator;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Service
public class AccountManagerImpl implements AccountManager {
@Autowired
private AccountRepository accountDAO;
@Override
@Transactional
public void chargeForLowBalance(BigDecimal minimumBalance, BigDecimal amount) {
List<Account> accounts = accountDAO.findAccountsWithLowBalance(minimumBalance);
for (Iterator<Account> iterator = accounts.iterator(); iterator.hasNext();) {
Account account = (Account) iterator.next();
// Check if the balance will go beyond 0. If yes, set the balance to 0
account.setBalance(account.getBalance().subtract(amount));
accountDAO.update(account);
}
}
@Override
@Transactional
public Account create() {
return accountDAO.createAccount();
}
@Override
public Account find(int accountNumber) {
return accountDAO.getAccount(accountNumber);
}
@Override
@Transactional
public void delete(int accountNumber) {
accountDAO.delete(accountNumber);
}
@Override
@Transactional
public Account deposit(int accountNumber, BigDecimal amount) {
Account account = accountDAO.getAccount(accountNumber);
account.setBalance(account.getBalance().add(amount));
accountDAO.update(account);
return account;
}
@Override
public Account withdraw(int accountNumber, BigDecimal amount) {
Account account = accountDAO.getAccount(accountNumber);
account.setBalance(account.getBalance().subtract(amount));
accountDAO.update(account);
return account;
}
@Override
@Transactional
public Account transfer(int accountNumber1, int accountNumber2, BigDecimal amount) {
Account account1 = accountDAO.getAccount(accountNumber1);
account1.setBalance(account1.getBalance().subtract(amount));
accountDAO.update(account1);
Account account2 = accountDAO.getAccount(accountNumber2);
account2.setBalance(account2.getBalance().add(amount));
accountDAO.update(account2);
return account1;
}
}
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