chamikaramj commented on code in PR #31470:
URL: https://github.com/apache/beam/pull/31470#discussion_r1624829545
##########
sdks/java/core/src/main/java/org/apache/beam/sdk/values/PCollectionRowTuple.java:
##########
@@ -180,6 +181,22 @@ public PCollection<Row> get(String tag) {
return pcollection;
}
+ /**
+ * Like {@link #get(String)}, but is a convenience method to get a single
output without providing
+ * a tag for that output. Use only when there is a single output.
+ *
+ * <p>Throws {@link IllegalStateException} if more than one output exists in
the {@link
+ * PCollectionRowTuple}.
+ */
+ public PCollection<Row> getOutput() {
Review Comment:
May be call this `getOnlyPCollection()` since `PCollectionRowTuple` can be
used as input or output.
##########
sdks/java/managed/src/main/java/org/apache/beam/sdk/managed/Managed.java:
##########
@@ -194,7 +199,28 @@ public PCollectionRowTuple expand(PCollectionRowTuple
input) {
SchemaTransform underlyingTransform =
new
ManagedSchemaTransformProvider(getSupportedIdentifiers()).from(managedConfig);
- return input.apply(underlyingTransform);
+ return inputTuple.apply(underlyingTransform);
+ }
+
+ @VisibleForTesting
+ static PCollectionRowTuple resolveInput(PInput input) {
Review Comment:
Will it be possible to introduce a similar simplification for output so that
callers do not have to call `getOutput` when there's only one output
`PCollection` ?
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