package io.prediction.examples.java.recommendations.tutorial4;

import io.prediction.controller.java.LJavaServing;
import io.prediction.controller.java.EmptyParams;
import java.lang.Iterable;

public class Serving extends LJavaServing<EmptyParams, Query, Float> {
  public Serving() {}

  public Float serve(Query query, Iterable<Float> predictions) {
    float sum = 0.0f;
    int count = 0;
    
    for (Float v: predictions) {
      if (!v.isNaN()) {
        sum += v;
        count += 1;
      }
    }
    return (count == 0) ? Float.NaN : sum / count;
  }
}


package io.prediction.examples.java.recommendations.tutorial4;

import io.prediction.controller.java.LJavaServing;
import io.prediction.controller.java.EmptyParams;
import java.lang.Iterable;

public class Serving extends LJavaServing<EmptyParams, Query, Float> {
  public Serving(EmptyParams ep) {}

  public Float serve(Query query, Iterable<Float> predictions) {
    float sum = 0.0f;
    int count = 0;
    
    for (Float v: predictions) {
      if (!v.isNaN()) {
        sum += v;
        count += 1;
      }
    }
    return (count == 0) ? Float.NaN : sum / count;
  }
}


--- 
+++ 
@@ -5,7 +5,7 @@
 import java.lang.Iterable;
 
 public class Serving extends LJavaServing<EmptyParams, Query, Float> {
-  public Serving(EmptyParams ep) {}
+  public Serving() {}
 
   public Float serve(Query query, Iterable<Float> predictions) {
     float sum = 0.0f;
Use empty constructor for empty params.
