public String getExceptions() {
        if (this.exceptions == null || exceptions.size() == 0) return null;
        StringBuilder sb = new StringBuilder();
        Iterator<WildcardMatcher> iterator = exceptions.iterator();
        while (iterator.hasNext()) {
            WildcardMatcher next =  iterator.next();
            sb.append(next.wildcardString);
            if (iterator.hasNext()) sb.append(",");

        }

        return sb.toString();
    }