convert XMLGregorianCalendar to GregorianCalendar

convert XMLGregorianCalendar to GregorianCalendar and vice versa
java code

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.XMLGregorianCalendar;

import org.apache.xerces.jaxp.datatype.DatatypeFactoryImpl;

 
public final class DateConverter {

    private DateConverter() {

    }

    /**
     *  gregorianCalendar conversion
     *   
     */
    private static XMLGregorianCalendar createXmlGregorianCalendar(
	    GregorianCalendar gregorianCalendar) {
	XMLGregorianCalendar xMLGregorianCalendar = null;

	try {
	    xMLGregorianCalendar = DatatypeFactoryImpl.newInstance()
		    .newXMLGregorianCalendar(gregorianCalendar);
	} catch (DatatypeConfigurationException e) {
	    // do something
	}

	return xMLGregorianCalendar;
    }

    /**
     *  xMLGregorianCalendar
     *            to be converted to GregorianCalendar
     * 
     */
    private static GregorianCalendar createCalendar(
	    XMLGregorianCalendar xMLGregorianCalendar) {
	return xMLGregorianCalendar.toGregorianCalendar();
    }

    /*
     * Convert the date to Calendar.     
     */
    public static Calendar createCalendar(Date date) {

	Calendar calendar = GregorianCalendar
	        .getInstance();
	calendar.setTime(date);

	return calendar;
    }

}