Sum.java

package storm.trident.operation.builtin;

import clojure.lang.Numbers;
import storm.trident.operation.CombinerAggregator;
import storm.trident.tuple.TridentTuple;


public class Sum implements CombinerAggregator<Number> {

    @Override
    public Number init(TridentTuple tuple) {
        return (Number) tuple.getValue(0);
    }

    @Override
    public Number combine(Number val1, Number val2) {
        return Numbers.add(val1, val2);
    }

    @Override
    public Number zero() {
        return 0;
    }
    
}