Github user uce commented on a diff in the pull request:
https://github.com/apache/incubator-flink/pull/194#discussion_r20569311
--- Diff:
flink-java/src/main/java/org/apache/flink/api/java/operators/CrossOperator.java
---
@@ -517,859 +542,426 @@ public CrossProjection(DataSet<I1> ds1, DataSet<I2>
ds2, int[] firstFieldIndexes
// GENERATED FROM org.apache.flink.api.java.tuple.TupleGenerator.
/**
+ * Chooses a projectTupleX according to the length of {@link
CrossProjection#fieldIndexes}
+ *
+ * @return The projected DataSet.
+ *
+ * @see Projection
+ */
+ @SuppressWarnings("unchecked")
+ public <OUT extends Tuple> ProjectCross<I1, I2, OUT>
projectTupleX() {
+ ProjectCross<I1, I2, OUT> projectionCross = null;
+
+ switch (fieldIndexes.length) {
+ case 1: projectionCross = (ProjectCross<I1, I2, OUT>)
projectTuple1(); break;
--- End diff --
Can you add a warning to the TupleGenerator classes that this method
depends on the number of available tuples? It's a corner case, but it might
happen that the number of available tuples and this method get out of sync.
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