JAXB nullpointer when marshalling a null date value

[vincentkok.nl]

Hi all,

I have a custom XmlAdapter to Marshal org.joda.time.DateTime to xsate

public String marshal(YearMonthDay v) {
		if (v.getYearMonthDay() != null) {
			return v.getYearMonthDay()
					.toString(DateTimeFormat.forPattern("YYYY-MM-dd"));
		} else {
			return null;
		}
	}

When I return a null value (if the value is null) I will receive a nullpointer in JAXB:

Caused by: java.lang.NullPointerException
	at com.sun.xml.internal.bind.v2.runtime.output.SAXOutput.text(SAXOutput.java:114)

So my question is: Is it illegal to return null here? If so how to deal with null values?

Thanks in advance.

Regards,

[vincentkok.nl]

Seems to be an issue in JAXB: https://jaxb.dev.java.net/issues/show_bug.cgi?id=415