public static String tran(WorkItem item){
		XStream xstream = new XStream();
		xstream.setMode(XStream.NO_REFERENCES);
		xstream.alias("workitem",WorkItem.class);		
		return xstream.toXML(item);
	}
	
	public static String tranJson(WorkItem item){
		XStream xstream = new XStream(new JsonHierarchicalStreamDriver());
		xstream.setMode(XStream.NO_REFERENCES);
		xstream.alias("workitem",WorkItem.class);		
		return xstream.toXML(item);
	}