return "http:
return protocol + ":
  public String getURL(){    String pspPackage = getPSPPackage();    boolean hasPackage = (pspPackage.length () > 0);    return "http://" + getHost() +":"+ Integer.toString(getPort())      +"/$"+ getClusterName() +      ((hasPackage) ? ("/"+ pspPackage) : "") +"/"+ getPSPID();  }