return new HashSet((Set)mapping.get(new Integer(transactionIsolation)));
return new HashSet((Set)mapping.get( new Integer(Connection.TRANSACTION_READ_COMMITTED)));
    public Set getMapping(int transactionIsolation) throws FBResourceException {                switch(transactionIsolation) {                        case Connection.TRANSACTION_SERIALIZABLE:             case Connection.TRANSACTION_REPEATABLE_READ:            case Connection.TRANSACTION_READ_COMMITTED:            case Connection.TRANSACTION_READ_UNCOMMITTED:                return new HashSet((Set)mapping.get(new Integer(transactionIsolation)));                            default:                throw new FBResourceException(                    "Transaction isolation level " + transactionIsolation +                     " is not supported.");        }    }