Github user tweise commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/261#discussion_r63966880
--- Diff: library/src/main/java/com/datatorrent/lib/algo/UniqueCounter.java
---
@@ -78,10 +78,10 @@ public void process(K tuple)
/**
* The output port which emits a map from keys to the number of times
they occurred within an application window.
*/
- public final transient DefaultOutputPort<HashMap<K, Integer>> count =
new DefaultOutputPort<HashMap<K, Integer>>()
+ public final transient DefaultOutputPort<Map<K, Integer>> count = new
DefaultOutputPort<Map<K, Integer>>()
--- End diff --
Why this change? The output port should declare the specific type. Unlike
the input port, which should be least restrictive.
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