rdblue commented on code in PR #18853:
URL: https://github.com/apache/iceberg/pull/18853#discussion_r4519269282
##########
core/src/main/java/org/apache/iceberg/V4Metadata.java:
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@@ -541,4 +548,730 @@ public Long pos() {
return null;
}
}
+
+ /** Base wrapper used to write a {@link TrackedFile} using the v4 tracked
file schema. */
+ private static void checkNullSequenceNumbers(TrackedFile file, Tracking
tracking) {
+ // null sequence numbers are inherited from the commit: ADDED entries
inherit both and
+ // MODIFIED entries inherit only the data sequence number
+ EntryStatus status = tracking.status();
+ Preconditions.checkState(
+ tracking.dataSequenceNumber() != null
+ || status == EntryStatus.ADDED
+ || status == EntryStatus.MODIFIED,
+ "Cannot write null data sequence number for status %s (must be ADDED
or MODIFIED): %s",
+ status,
+ file.location());
+ Preconditions.checkState(
+ tracking.fileSequenceNumber() != null || status == EntryStatus.ADDED,
+ "Cannot write null file sequence number for status %s (must be ADDED):
%s",
+ status,
+ file.location());
+ }
+
+ private abstract static class TrackedFileWrapper implements TrackedFile,
StructLike {
Review Comment:
It would probably be cleaner to use the approach we used for v3, where there
is a class in `Delegates` that handles the `TrackedFile` methods. Then this
just needs to handle `StructLike`.
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