kennknowles commented on code in PR #26413:
URL: https://github.com/apache/beam/pull/26413#discussion_r1179442083
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sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/utils/SelectByteBuddyHelpers.java:
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@@ -174,10 +171,13 @@ static RowSelector createRowSelector(SchemaAndDescriptor
schemaAndDescriptor) {
.withParameters(Schema.class)
.intercept(new SelectInstructionConstructor());
+ Optional<ClassLoader> rowClassLoader =
Optional.ofNullable(Row.class.getClassLoader());
+ checkState(rowClassLoader.isPresent());
Review Comment:
You can get the same effect as your code without going through `Optional` by
using `org.apache.beam.sdk.util.Preconditions.checkStateNotNull`. Here and in
the other locations.
(I do prefer to use `Optional` in data structure design rather than null,
because it is clearer and composes, but in this case it doesn't seem to add
much)
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