CXF-9054 do not use Date and SimpleDateFormat when parsing LocalDate,…

[vershnik]

… use the appropriate DateTimeFormatter for LocalDate

[reta]

Thanks @vershnik , as you pointed out, this is very likely JDK related issue [1] that is not related to CXF (and impact all other applications out there).

[1] https://bugs.openjdk.org/browse/JDK-8294357

[vershnik]

Even though it may turn out to be JDK issue, I think using DateTimeFormatter for parsing LocalDate is more appropriate and performance efficient (no need to create instances of SimpleDateFormat, Date, Instant, ZonedDateTime)

[reta]

Even though it may turn out to be JDK issue, I think using DateTimeFormatter for parsing LocalDate is more appropriate and performance efficient (no need to create instances of SimpleDateFormat, Date, Instant, ZonedDateTime)

The DateTimeFormatter is certainly newer API than SimpleDateFormat but to my knowledge, DateTimeFormatter and SimpleDateFormat are not compatible [1], [2] (please correct me if I am wrong here). We could bring the changes than risk to break existing applications but those won't be backported.

To your point, it would make sense to migrate to java.time APIs but that should not be limited to LocalDate only (for example, the SearchUtils still use SimpleDateFormat).

[1] https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html
[2] https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html

[vershnik]

yes, looks like there is incompatibility between DateTimeFormatter and SimpleDateFormat
For example SimpleDateFormat for pattern 'yyyy-MM-dd' can parse even dates that contain time:
parse("2019-07-07 23:59:59")

while DateTimeFormatter is more strict here. So this change cannot be backported.