List wrappers in JAXB MOXy

Question

I am declaring a List object property with:

@XmlRootElement(namespace = "...")
@XmlType
public class Test {
    private List<String> myList;

    @XmlElementWrapper(name = "myListWrapper")
    @XmlElement(name = "myList")
    public List<String> getMyList() {
        return myList;
    }
}

When an instance of this class with an empty list myList is marshalled, MOXy is not generating an empty wrapper MyListWrapper. However, JAXB RI would do it. The generated XML looks like this when using the RI:

<ns2:test xmlns:ns2="...">
    <myListWrapper/>
</ns2:intensionalSet>

Is there a way to obtain the same result with MOXy?

Answer 1

Note: I'm the EclipseLink JAXB (MOXy) lead and a member of the JAXB 2 (JSR-222) expert group.

This is a bug in the MOXy implementation of JAXB. You can use the following link to track this issue:

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=363197