Core: Add DateFormatter interface for java time parsing (#33467) #33716
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The existing approach used date formatters when a format based string like `date_time||epoch_millis` was used, instead of the custom code. In order to properly solve this, a new interface called `DateFormatter` has been added, which now can be implemented for custom formatters. Currently there are two implementations, one using java time and one doing the epoch_millis formatter, which simply parses a number and then converts it to a date in UTC timezone. The DateFormatter interface now also has a method to retrieve the name of the formatter pattern, which is needed for mapping changes anyway. The existing `CompoundDateTimeFormatter` class has been removed, the name was not really nice anyway. One more minor change is the fact, that the new java time using FormatDateFormatter does not try to parse the date with its printer implementation first (which might be a strict one and fail), but a printer can now be specified in addition. This saves one potential failure/exception when parsing less strict dates. If only a printer is specified, the printer will also be used as a parser.
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The existing approach used date formatters when a format based string
like
date_time||epoch_milliswas used, instead of the custom code.In order to properly solve this, a new interface called
DateFormatterhas been added, which now can be implemented for customformatters. Currently there are two implementations, one using java time
and one doing the epoch_millis formatter, which simply parses a number
and then converts it to a date in UTC timezone.
The DateFormatter interface now also has a method to retrieve the name
of the formatter pattern, which is needed for mapping changes anyway.
The existing
CompoundDateTimeFormatterclass has been removed, thename was not really nice anyway.
One more minor change is the fact, that the new java time using
FormatDateFormatter does not try to parse the date with its printer
implementation first (which might be a strict one and fail), but a
printer can now be specified in addition. This saves one potential
failure/exception when parsing less strict dates.
If only a printer is specified, the printer will also be used as a
parser.
This is the 6.x backport of #33467