Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/storm/pull/1663#discussion_r81950872
--- Diff: storm-core/src/jvm/org/apache/storm/trident/Stream.java ---
@@ -421,6 +421,25 @@ public Stream map(MapFunction function) {
}
/**
+ * Returns a stream consisting of the result of applying the given
mapping function to the values of this stream.
+ * This method replaces old output fields with new output fields,
achieving T -> V conversion.
+ *
+ * @param function a mapping function to be applied to each value in
this stream.
+ * @param outputFields new output fields
+ * @return the new stream
+ */
+ public Stream map(MapFunction function, Fields outputFields) {
+ projectionValidation(getOutputFields());
--- End diff --
Shouldnt this be outputFields?
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