How To Populate XMLGregorianCalendar()

Question

I need to populate a JAX Bean from XML, however there is no setter method. I get the following message below

 Failed to invoke public javax.xml.datatype.XMLGregorianCalendar() with no args

I wrote the following methods to take a date and transform it to XMLGregorianCalendar, and then call a setter in my wrapper class. However I still get the exception. Is there a standard way of handling this data type that I am overlooking? Maybe my wrapper class is not calling it, but Netbeans won't allow me to attach a debugger to it for some reason.

public XMLGregorianCalendar asXMLGregorianCalendar(java.util.Date date) throws DatatypeConfigurationException {
    DatatypeFactory datatypeFactory = DatatypeFactory.newInstance();
    if (date == null) {
        return null;
    } else {
        GregorianCalendar gc = new GregorianCalendar();
        gc.setTimeInMillis(date.getTime());
        return datatypeFactory.newXMLGregorianCalendar(gc);
    }
}

The setter in the Bean is below

public void setDeliveryDate(XMLGregorianCalendar value) {
    this.deliveryDate = value;
}

Answer 1

Your sample code shows you trying to populate it with a Date object, while the question itself says you are trying to populate from XML. So unless I misunderstand, to populate from XML just use:

XmlGregorianCalendar cal = DatatypeFactory.newInstance().newXMLGregorianCalendar(yourXmlDateTimeString);

Answer 2

I would suggest using Joda Time -- The Java Date Api frustrates a lot of developers. If you want to stick with the core libraries, try using a DataTypeFactory.

public static XMLGregorianCalendar asXMLGregorianCalendar(Date date) {
    java.util.GregorianCalendar calDate = new java.util.GregorianCalendar();        
    calDate.setTime(date);
    javax.xml.datatype.XMLGregorianCalendar calendar = null;
        try {
            javax.xml.datatype.DatatypeFactory factory = javax.xml.datatype.DatatypeFactory.newInstance();
            calendar = factory.newXMLGregorianCalendar(
            calDate.get(java.util.GregorianCalendar.YEAR),
            calDate.get(java.util.GregorianCalendar.MONTH) + 1,
            calDate.get(java.util.GregorianCalendar.DAY_OF_MONTH),
            calDate.get(java.util.GregorianCalendar.HOUR_OF_DAY),
            calDate.get(java.util.GregorianCalendar.MINUTE),
            calDate.get(java.util.GregorianCalendar.SECOND),
            calDate.get(java.util.GregorianCalendar.MILLISECOND), 0);
        } catch (DatatypeConfigurationException dce) {
            //handle or throw
        }   
    return calendar;
}