* @return false if this publisher is not active, or, if it
* active, returns true if the url is not empty...
* if the url is empty, throws an exception
*/
private boolean checkPublish(String s, Object text, String property) {
CGPublish p = getPublisher(s);
if (p.cp_Publish) {
String url = (String)Helper.getUnoPropertyValue(getModel(text),property);
if ((url == null) || (url.equals("")))
throw new IllegalArgumentException();
else return true;