MOXY JAXB @XmlID和繼承

我有以下層次：MOXY JAXB @XmlID和繼承

public class Small { 
    private String xmlId; 

    @XmlID 
    @XmlAttribute 
    public String getXmlId() { 
     if (xmlId == null) 
      xmlId = "small" + new Random().nextInt(); 
     return xmlId; 
    } 

    public void setXmlId(String id) { 
     this.xmlId = id; 
    } 
} 

public class Big extends Small { 
    // Code 
}

當我試圖元帥類巴茲：

@XmlRootElement 
@XmlAccessorType(XmlAccessType.NONE) 
public class Baz { 
    private List<Small> smalls = new LinkedList<Small>(); 

    private Small small; 
    private Big big; 

    @XmlIDREF 
    public Small getSmall() { 
     return small; 
    } 

    public void setSmall(Small small) { 
     this.small = small; 
    } 

    @XmlIDREF 
    public Big getBig() { 
     return big; 
    } 

    public void setBig(Big big) { 
     this.big = big; 
    } 

    @XmlElementWrapper(name = "smalls") 
    @XmlElement(name = "small") 
    public List<Small> getSmalls() { 
     return smalls; 
    } 

    public void setSmalls(List<Small> smalls) { 
     this.smalls = smalls; 
    } 
}

我使用下面的測試代碼：

public class Test2 { 
    public static void main(String[] args) throws Exception { 
     Small s1 = new Small(); 
     Small s2 = new Small(); 
     Big b1 = new Big(); 

     List<Small> smalls = new LinkedList<Small>(); 
     smalls.add(s1); 
     smalls.add(s2); 
     smalls.add(b1); 

     Baz baz = new Baz(); 
     baz.setSmalls(smalls); 
     baz.setSmall(s2); 
     baz.setBig(b1); 

     JAXBContext jc = JAXBContext.newInstance(Baz.class); 
     Marshaller m = jc.createMarshaller(); 
     m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); 
     m.marshal(baz, System.out); 
    } 
}

不幸的是，在做元帥的時候，我面臨着以下例外：

Exception in thread "main" javax.xml.bind.JAXBException: 
Exception Description: Invalid XmlIDREF on property [big]. Class [test.moxy.Big] is required to have a property annotated with XmlID.

我希望XmlID註釋可以被Big類繼承。我曾嘗試在Big類中添加「另一個」@XmlID註釋，它修復了編組問題。然而，這在生成XML模式時會導致另一個問題，該模式現在將包含兩個不允許的ID屬性。

我做錯了什麼？

來源

2011-08-03 Kasper Nielsen