nastra commented on code in PR #13217:
URL: https://github.com/apache/iceberg/pull/13217#discussion_r2166341883
##########
api/src/main/java/org/apache/iceberg/transforms/Timestamps.java:
##########
@@ -32,24 +32,79 @@
import org.apache.iceberg.util.SerializableFunction;
enum Timestamps implements Transform<Long, Integer> {
- MICROS_TO_YEAR(ChronoUnit.YEARS, "year", MicrosToYears.INSTANCE),
- MICROS_TO_MONTH(ChronoUnit.MONTHS, "month", MicrosToMonths.INSTANCE),
- MICROS_TO_DAY(ChronoUnit.DAYS, "day", MicrosToDays.INSTANCE),
- MICROS_TO_HOUR(ChronoUnit.HOURS, "hour", MicrosToHours.INSTANCE),
+ MICROS_TO_YEAR(ChronoUnit.YEARS, "year", TimestampUnit.MICROS),
+ MICROS_TO_MONTH(ChronoUnit.MONTHS, "month", TimestampUnit.MICROS),
+ MICROS_TO_DAY(ChronoUnit.DAYS, "day", TimestampUnit.MICROS),
+ MICROS_TO_HOUR(ChronoUnit.HOURS, "hour", TimestampUnit.MICROS),
- NANOS_TO_YEAR(ChronoUnit.YEARS, "year", NanosToYears.INSTANCE),
- NANOS_TO_MONTH(ChronoUnit.MONTHS, "month", NanosToMonths.INSTANCE),
- NANOS_TO_DAY(ChronoUnit.DAYS, "day", NanosToDays.INSTANCE),
- NANOS_TO_HOUR(ChronoUnit.HOURS, "hour", NanosToHours.INSTANCE);
+ NANOS_TO_YEAR(ChronoUnit.YEARS, "year", TimestampUnit.NANOS),
+ NANOS_TO_MONTH(ChronoUnit.MONTHS, "month", TimestampUnit.NANOS),
+ NANOS_TO_DAY(ChronoUnit.DAYS, "day", TimestampUnit.NANOS),
+ NANOS_TO_HOUR(ChronoUnit.HOURS, "hour", TimestampUnit.NANOS);
+
+ @Immutable
+ static class Apply implements SerializableFunction<Long, Integer> {
+ private final ChronoUnit granularity;
+ private final TimestampUnit timestampUnit;
+
+ Apply(ChronoUnit granularity, TimestampUnit timestampUnit) {
+ this.granularity = granularity;
+ this.timestampUnit = timestampUnit;
+ }
+
+ @Override
+ public Integer apply(Long timestamp) {
+ if (timestamp == null) {
+ return null;
+ }
+
+ switch (timestampUnit) {
+ case MICROS:
+ switch (granularity) {
+ case YEARS:
+ return DateTimeUtil.microsToYears(timestamp);
+ case MONTHS:
+ return DateTimeUtil.microsToMonths(timestamp);
+ case DAYS:
+ return DateTimeUtil.microsToDays(timestamp);
+ case HOURS:
+ return DateTimeUtil.microsToHours(timestamp);
+ default:
+ throw new UnsupportedOperationException("Unsupported time unit:
" + granularity);
+ }
+
+ case NANOS:
+ switch (granularity) {
+ case YEARS:
+ return DateTimeUtil.nanosToYears(timestamp);
+ case MONTHS:
+ return DateTimeUtil.nanosToMonths(timestamp);
+ case DAYS:
+ return DateTimeUtil.nanosToDays(timestamp);
+ case HOURS:
+ return DateTimeUtil.nanosToHours(timestamp);
+ default:
+ throw new UnsupportedOperationException("Unsupported time unit:
" + granularity);
+ }
+ default:
+ throw new UnsupportedOperationException("Unsupported time unit: " +
timestampUnit);
+ }
+ }
+ }
+
+ enum TimestampUnit {
Review Comment:
can you please move this right above `Apply`?
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