final ParsePosition pos = new ParsePosition(0);
        final Date date = format.parse(str, pos);
        if (date == null) {
            return null;
        }
        final int index = pos.getIndex();
        if (index == 0) {
            return null;
        }
        if (index < str.length()) {
            return null;
        }
        return date;
    }

    /**

        final ParsePosition pos = new ParsePosition(0);
        final Date date = format.parse(str, pos);
        if (date == null) {
            return null;
        }
        final int index = pos.getIndex();
        if (index == 0) {
            return null;
        }
        if (index < str.length()) {
            return null;
        }
        return date;
    }

    /**

        try {
            final FessConfig fessConfig = ComponentUtil.getFessConfig();
            final UpdateRequestBuilder builder =
                    ComponentUtil.getSearchEngineClient().prepareUpdate().setIndex(fessConfig.getIndexDocumentUpdateIndex()).setId(id);
            builderLambda.accept(builder);
            final UpdateResponse response = builder.execute().actionGet(fessConfig.getIndexIndexTimeout());