Jackson ZonedDateTime support

[gkocak-scottlogic]

Some tests are failing due to:

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Java 8 date/time type `java.time.ZonedDateTime` not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling

Probably can be resolved by adding:

<dependency>
	<groupId>com.fasterxml.jackson.datatype</groupId>
	<artifactId>jackson-datatype-jsr310</artifactId>
	<version>2.6.0</version>
</dependency>

to pom.

[gkocak-scottlogic]

Apparently, the "old" JSR310Module is deprecated. [1]

A way to deal with this can be:

ObjectMapper mapper = JsonMapper.builder()
        .findAndAddModules()
        .build();

instead of

ObjectMapper mapper = new ObjectMapper();

[gkocak-scottlogic]

Even with this potential change, java time types are flexible and create some additional errors.

com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.time.ZonedDateTime` from String "2013-07-21": Failed to deserialize java.time.ZonedDateTime: (java.time.format.DateTimeParseException) Text '2013-07-21' could not be parsed at index 10

i.e. 2013-07-21 is not parsed as 2013-07-21T00:00:00.000Z directly.

ZonedDateTime is very strict where may or may not include the time info.

[gkocak-scottlogic]

Defaulting some fields can be done by (from [1]

DateTimeFormatter fmt = new DateTimeFormatterBuilder()
        .appendValue(ChronoField.YEAR)
        .parseDefaulting(ChronoField.MONTH_OF_YEAR, 1)
        .parseDefaulting(ChronoField.DAY_OF_MONTH, 1)
        .parseDefaulting(ChronoField.HOUR_OF_DAY, 0)
        .toFormatter()
        .withZone(ZoneOffset.UTC);

---

Giving datetimeformatter to the objectmapper by (from [2]

JavaTimeModule javaTimeModule = new JavaTimeModule(); 
LocalDateTimeDeserializer dateTimeDeserializer = new LocalDateTimeDeserializer(formatter);
LocalDateTimeSerializer dateTimeSerializer = new LocalDateTimeSerializer(formatter);
javaTimeModule.addDeserializer(LocalDateTime.class, dateTimeDeserializer);
javaTimeModule.addSerializer(LocalDateTime.class, dateTimeSerializer);

ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(javaTimeModule);

I really don't like cluterring the code with these to be honest but I guess we might not have much option. And these examples are for for LocalDateTime and might not work on ZonedDateTime.

[gkocak-scottlogic]

Probably we will need a custom deser [1].

[gkocak-scottlogic]

Fixed with #45