public class Sum extends Object implements CombinerAggregator<Number>
Constructor and Description |
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Sum() |
public Number init(TridentTuple tuple)
init
in interface CombinerAggregator<Number>
public Number combine(Number val1, Number val2)
combine
in interface CombinerAggregator<Number>
public Number zero()
zero
in interface CombinerAggregator<Number>
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