rdblue commented on code in PR #16867:
URL: https://github.com/apache/iceberg/pull/16867#discussion_r3456139767
##########
core/src/main/java/org/apache/iceberg/TrackedFileAdapters.java:
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@@ -405,6 +418,135 @@ public DeleteFile copyWithStats(Set<Integer>
requestedColumnIds) {
}
}
+ /**
+ * Adapts a TrackedFile DATA_MANIFEST or DELETE_MANIFEST entry to the {@link
ManifestFile}
+ * interface.
+ */
+ private static class TrackedManifestFile implements ManifestFile {
+ private final TrackedFile file;
+
+ private TrackedManifestFile(TrackedFile file) {
+ Preconditions.checkArgument(
+ file.tracking().dataSequenceNumber() != null,
+ "Cannot create manifest file: no data sequence number");
+ Preconditions.checkArgument(
+ file.tracking().snapshotId() != null, "Cannot create manifest file:
no snapshot ID");
+ Preconditions.checkArgument(
+ file.manifestInfo() != null, "Cannot create manifest file: no
manifest info");
+ Preconditions.checkArgument(
+ file.manifestInfo().dv() == null,
+ "Cannot adapt manifest with a deletion vector to ManifestFile: %s",
+ file.location());
+ this.file = file;
+ }
+
+ @Override
+ public String path() {
+ return file.location();
+ }
+
+ @Override
+ public long length() {
+ return file.fileSizeInBytes();
+ }
+
+ @Override
+ public int partitionSpecId() {
+ throw new UnsupportedOperationException(
+ "Tracked manifests are not bound to a single partition spec");
Review Comment:
I don't think that it is correct to say "Tracked manifests": what is a
"tracked" manifest and why is one from a manifest list not "tracked"?
I think it is better to say "v4 manifests are not bound to a single
partition spec".
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