public Iterator static read(Connection con, String policyId) throws SQLException, NotFoundException{
         ResultSet rset = null;
         final PreparedStatement pstmt = con.prepareStatement(SQL_SELECT_POILCY);
         try{
             pstmt.setString(1, policyId);
             rset = pstmt.executeQuery();
             return new Iterator () {
                 public boolean hasNext() {
                     return rset.isLast();
                 }
                 public Object next()     {
                     if(rset.next()) {
                         return new withdrawDeduction(policyId, rset.getInt(1), new BigDecimal(rset.getDouble(2)));
                     else
                         throw new NoSuchElementException();
                 }
                 public void remove() {
                     throw new UnsupportedOperationException();
                 }
                 protected void finalize() throws Throwable{
                     try{
                        SQLUtility.cleanup(rset);
                        SQLUtility.cleanup(pstmt);
                     }
                     catch(Throwable t) {}
                     super.finalize();
                 } 
             };
         }
     }