}
            buf.append('}');
        } else if ((obj instanceof Integer) || (obj instanceof Long) || (obj instanceof Float) || (obj instanceof Double)) {
            buf.append((obj));
        } else if (obj instanceof Boolean) {
            buf.append(obj.toString());
        } else if (obj instanceof Date) {

        }
    }

    public boolean store(final String index, final Object obj) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        @SuppressWarnings("unchecked")
        final Map<String, Object> source = obj instanceof Map ? (Map<String, Object>) obj : BeanUtil.copyBeanToNewMap(obj);
        final String id = (String) source.remove(fessConfig.getIndexFieldId());

                        .filter(s -> !validateDateTimeString(source.get(s))).collect(Collectors.toList()));
    }

    default boolean validateDateTimeString(final Object obj) {
        if (FessFunctions.parseDate(obj.toString()) != null) {
            return true;
        }
        return false;
    }

    String getIndexAdminIntegerFields();