DateTimeSerializerBase doesn't use WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS with java.sql.Timestamp

[hadrienk]

When converted using DateTimeSerializerBase, java.sql.Timestamp instances are not written in nanoseconds, even if the WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS feature is enabled.

I found this error doing the following:

ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JavaTimeModule());
mapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, true);
mapper.configure(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS, true);
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, true);
mapper.convertValue(new Timestamp(1456412409000), Instant.class)

[hadrienk]

I wrote this issue on the databind project by mistake.

[cowtowncoder]

I am not sure this is possible to implement in backwards compatible manner; although I guess use of floating-point representation might work?

[cowtowncoder]

Actually support does need to be in jackson-databind so I'll close this, re-open the other one.
I am cautiously positive I'll actually have time to try to implement support.