Extracted abstract methods for DummyKernel

Author: dmi3coder

src/main/java/de/dmi3y/behaiv/kernel/DummyKernel.java

@@ -9,15 +9,16 @@ public class DummyKernel extends Kernel {
 
     private ArrayList<Pair<ArrayList<Double>, String>> data;
 
-    public boolean fit(ArrayList<Pair<ArrayList<Double>, String>> data) {
+    @Override
+    public void fit(ArrayList<Pair<ArrayList<Double>, String>> data) {
         this.data = data;
-        return true;
     }
 
-    public boolean update(ArrayList<Pair<ArrayList<Double>, String>> data) {
-        return false;
+    @Override
+    public void update(ArrayList<Pair<ArrayList<Double>, String>> data) {
     }
 
+    @Override
     public String predictOne(ArrayList<Double> features) {
 
         return this.data.stream().map(featuresIter -> {

src/main/java/de/dmi3y/behaiv/kernel/Kernel.java

@@ -1,14 +1,14 @@
 package de.dmi3y.behaiv.kernel;
 
+import org.apache.commons.math3.util.Pair;
+
 import java.util.ArrayList;
-import java.util.List;
 
 public abstract class Kernel {
 
-//    public abstract boolean fit(ArrayList<ArrayList<Double>> features, ArrayList<String> labels);
-//
-//    public abstract boolean update(ArrayList<ArrayList<Double>> features, ArrayList<String> labels);
-//
-//    public abstract ArrayList<String> predictOne(ArrayList<Double> features);
+    public abstract void fit(ArrayList<Pair<ArrayList<Double>, String>> data);
+
+    public abstract void update(ArrayList<Pair<ArrayList<Double>, String>> data);
 
+    public abstract String predictOne(ArrayList<Double> features);
 }