java - moxy jaxb @XmlID 和继承

Question

我有以下层次结构:

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
}

我试图编码 Baz 类的地方:

@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;
    }
}

我正在使用以下测试代码:

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，在执行编码(marshal)时，我遇到了以下异常:

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 Big 类继承 XmlID 注释。我尝试在 Big 类中添加“另一个”@XmlID 注释，这修复了编码问题。然而，这在生成 XML 架构时会导致另一个问题，该架构现在将包含两个 ID 属性，这是不允许的。

我做错了什么吗？

Answer 1

您看到的行为是一个错误 (https://bugs.eclipse.org/353787)。我们已经 checkin 了对 EclipseLink 2.3.1 和 2.4.0 流的修复，从 2011 年 8 月 4 日开始，我们的夜间下载页面将提供这些修复:

• http://www.eclipse.org/eclipselink/downloads/nightly.php