var XPCLUCENESERVICE_CONTRACTID = "@skrul.com/xpclucene;1";
var service = Components.classes[XPCLUCENESERVICE_CONTRACTID].getService(Components.interfaces.nsILuceneFactory);

const Ci = Components.interfaces;
var s = "";
for(var i in Ci) {
  try {
    if(service.QueryInterface(Components.interfaces[i])) {
      s += i + "\n";
    }
  }
  catch(e) {
  }
}

print(s);