}
if (usecaseResolver.isRegistered(this.webappUrl, tab.getUsecase())) {
Usecase usecase = null;
try {
usecase = usecaseResolver.resolve(this.webappUrl, tab.getUsecase());
usecase.setSourceURL(this.webappUrl);
usecase.setName(tab.getUsecase());
String[] keys = tab.getParameterNames();
for (int i = 0; i < keys.length; i++) {
usecase.setParameter(keys[i], tab.getParameter(keys[i]));