// added:
public Election convert() throws DatatypeConfigurationException {
Election el = new Election();
el.setId(this.getId().toString());
el.setPrivateKey(this.getPrivateKey());
el.setPublicKey(this.getPublicKey());
el.setTitle(this.getTitle());
el.setQuestion(this.getQuestion());
el.setUrl(this.getUrl());
GregorianCalendar c = new GregorianCalendar();
c.setTime(this.getValidFrom());
el.setValidFrom(DatatypeFactory.newInstance().newXMLGregorianCalendar(c));
c.setTime(this.getValidTo());
el.setValidTo(DatatypeFactory.newInstance().newXMLGregorianCalendar(c));
for (int i = 0; i < this.choice.size(); i++) {
el.getChoice().add(choice.get(i).convert());
}
return el;
}
