@Override
 public int hashCode() {
   final int prime = 31;
   int result = 1;
   result = prime * result + ((affectedCtxId == null) ? 0 : affectedCtxId.hashCode());
   result = prime * result + ((myContextType == null) ? 0 : myContextType.hashCode());
   result = prime * result + ((myPrivacyType == null) ? 0 : myPrivacyType.hashCode());
   result = prime * result + ((pref == null) ? 0 : pref.hashCode());
   result = prime * result + ((requestor == null) ? 0 : requestor.hashCode());
   return result;
 }