Github user nickwallen commented on the issue: https://github.com/apache/metron/pull/942 The first point here is around semantics. I am assuming the semantics of this would be a "max of maxes". So if I have a list of stats objects, I compare the max of each one. Whichever max is the greatest, that stats object gets returned. The MIN function would just be a "min of mins". Does that match your use case? Is this the right approach? Given those semantics, I think the 'Comparable' approach could work, but with a twist. You can't just make the Stats objects Comparable. Because how do you compare them? By the average, median, min or max? There is not one way to do it that is broadly applicable. The means of comparison for the MAX function should use the max of a stats object. The means of comparison for the MIN function should use the min of the stats object. One way is to create a class that wraps a Stats object and implements the Comparable interface. In the case of MAX, the wrapper will compare using the max of the underlying stats object. In the case of MIN function, the wrapper will compare using the min of the underlying stats object.
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