String[] dummy = {};
    public Collection nonUsedAccessRules(Collection availableaccessrules){      ArrayList nonusedaccessrules = new ArrayList();      String[] dummy = {};      int result;      Collections.sort(accessrules);      if(availableaccessrules != null){        Iterator iter = availableaccessrules.iterator();        while(iter.hasNext()){          String availableaccessrule = (String) iter.next();             result=java.util.Collections.binarySearch(accessrules,new AccessRule(availableaccessrule, 0, false));          if(result < 0){            // Access rule isn't in use.            nonusedaccessrules.add(availableaccessrule);          }        }      }      return nonusedaccessrules;    }