使用最新Quickfix时，如何正确设置TradeCaptureReport的NoSides和Side？

使用最新版Quickfix模拟发送TradeCaptureReport时，设置必填组件NoSides和Side取值时触发报错：

......22458=Incorrect NumInGroup count for repeating group, field=....

现有相关方案及库内示例均基于4.4版本，不适用于当前场景。当前代码实现如下：

TradeCaptureReport tradeCaptureReport = new TradeCaptureReport();
Instrument instrument = new Instrument();
instrument.set(new Symbol("XXX"));//55
instrument.set(new SecurityID("XXXXXX")); //48

TrdCapRptSideGrp trdCapRptSideGrp =new TrdCapRptSideGrp();
 // Create and add the NoSides group with the individual sides of the trade
NoSides noSides = new NoSides();
noSides.setValue(NoSides.ONE_SIDE);
trdCapRptSideGrp.set(noSides);
trdCapRptSideGrp.setField(new Side(Side.BUY));
tradeCaptureReport.set(new LastPx(123456));
tradeCaptureReport.set(new LastQty(1234));
tradeCaptureReport.set(new SettlDate("20231018"));
tradeCaptureReport.set(instrument);
tradeCaptureReport.set(trdCapRptSideGrp);

最新版Quickfix中，TrdCapRptSideGrp作为重复组，不能直接通过setField设置Side字段，需通过添加组实例的方式处理。修正后的代码如下：

TradeCaptureReport tradeCaptureReport = new TradeCaptureReport();
Instrument instrument = new Instrument();
instrument.set(new Symbol("XXX"));//55
instrument.set(new SecurityID("XXXXXX")); //48

// 初始化TrdCapRptSideGrp组件
TrdCapRptSideGrp trdCapRptSideGrp = new TrdCapRptSideGrp();
// 创建NoSides组实例并注入Side字段
NoSides noSidesGroup = new NoSides();
noSidesGroup.set(new Side(Side.BUY));
// 将组实例添加到TrdCapRptSideGrp中
trdCapRptSideGrp.addGroup(noSidesGroup);

tradeCaptureReport.set(new LastPx(123456));
tradeCaptureReport.set(new LastQty(1234));
tradeCaptureReport.set(new SettlDate("20231018"));
tradeCaptureReport.set(instrument);
tradeCaptureReport.set(trdCapRptSideGrp);

关键修正点： #

• 无需手动设置NoSides数值，Quickfix会自动根据添加的组数量计算该字段值，避免手动计数错误
• 使用addGroup()方法将包含Side字段的NoSides组实例添加到TrdCapRptSideGrp，匹配新版库对重复组的处理逻辑

内容的提问来源于stack exchange，提问作者Belgacem Gmiden