@Override
            public void onFailure(final Exception e) {
                deferred.reject(new SuggesterException(e.getMessage(), e));
            }
        });
    }

    private boolean isSingleWordQuery(final String query) {
        return !Strings.isNullOrEmpty(query) && !query.contains(" ") && !query.contains("　");
    }

    protected QueryBuilder buildQuery(final String q, final List<String> fields) {