public void serialize(Element users) {
public Element serialize() {
	public void serialize(Element users) {		users.addElement("user");		users.addElement("username").addText(this.userName);		users.addElement("realname").addText(this.realName);		users.addElement("password").addText(				new BASE64Encoder().encode(this.password.getBytes()));		Element roles = users.addElement("roles");		for (Iterator it = (Iterator) this.roles.iterator();	it.hasNext(); ) {			Role role = (Role) it.next();			roles.add(role.serialize());		}	}