public class BrokerageAccount {
  String accountNumber;
  String customerSocialSecurityNumber;

  // pominęliśmy konstruktory itp.
  public Customer getCustomer() {
    String sqlQuery = "SELECT * FROM CUSTOMER WHERE SS_NUMBER='"
    + customerSocialSecurityNumber + "'";
    return QueryService.findSingleCustomerFor(sqlQuery);
  }
  public Investment getInvestment(String stockSymbol) {
    String sqlQuery = "SELECT * FROM INVESTMENT "
    + "WHERE BROKERAGE_ACCOUNT='" + accountNumber + "'"
    + "AND STOCK_SYMBOL='" + stockSymbol +"'";
    return QueryService.findInvestmentFor(sqlQuery);
  }
}
