value = list.stream().collect(Collectors.joining("\n"));
                }
            } else if (dateFieldSet.contains(key)) {
                value = FessFunctions.formatDate((Date) value);
            } else if (integerFieldSet.contains(key) || longFieldSet.contains(key) || floatFieldSet.contains(key)
                    || doubleFieldSet.contains(key)) {
                value = value.toString();