groovy:合計請購單明細

groovy:合計請購單明細
Model Validator Table Event
====================
import groovy.sql.Sql
import java.sql.Timestamp
import java.sql.PreparedStatement
import java.sql.ResultSet
import org.compiere.util.Env
import org.compiere.util.DB
//  A_Ctx   A_PO  A_Type  A_Event

int client=Env.getContextAsInt(A_Ctx, "AD_Client_ID");
int org=Env.getContextAsInt(A_Ctx, "AD_Org_ID");
int uid=Env.getContextAsInt(A_Ctx, "#AD_User_ID");
//  int parent_id=Env.getContextAsInt(A_Ctx, "訂單_ID");
int parent_id=((Integer)A_PO.get_Value("訂單_ID")).intValue();

String sql = "SELECT SUM(金額),SUM(數量),SUM(重量),SUM(毛重)  FROM 訂單明細 WHERE 訂單_id =? ";
PreparedStatement pstmt = DB.prepareStatement(sql, A_PO.get_TrxName());
pstmt.setInt(1, parent_id);
ResultSet rs = pstmt.executeQuery();
while (rs.next()) {
BigDecimal price = rs.getBigDecimal (1);
BigDecimal qty = rs.getBigDecimal (2);
BigDecimal weight = rs.getBigDecimal (3);
BigDecimal gw = rs.getBigDecimal (4);

if (price==null)  price = new BigDecimal(0);
if (qty==null)  qty = new BigDecimal(0);
if (weight==null)  weight = new BigDecimal(0);
if (gw==null)  gw = new BigDecimal(0);

DB.executeUpdateEx("UPDATE 訂單 SET 訂單金額="+price+" , 訂單稅額="+price+" *營業稅率/100, 合計="+price+" * (1 + 營業稅率/100), 總重量="+weight+" , 總毛重="+gw+" WHERE 訂單_id ="+parent_id,  A_PO.get_TrxName());
}
rs.close();
pstmt.close();