1 files changed, 23 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/ranking/Normalizer.java b/container-search/src/main/java/com/yahoo/search/ranking/Normalizer.java
new file mode 100644
index 00000000000..eb81d0555b3
--- /dev/null
+++ b/container-search/src/main/java/com/yahoo/search/ranking/Normalizer.java
@@ -0,0 +1,23 @@
+// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.search.ranking;
+
+abstract class Normalizer {
+
+    protected final double[] data;
+    protected int size = 0;
+
+    Normalizer(int maxSize) {
+        this.data = new double[maxSize];
+    }
+
+    int addInput(double value) {
+        data[size] = value;
+        return size++;
+    }
+
+    double getOutput(int index) { return data[index]; }
+
+    abstract void normalize();
+
+    abstract String normalizing();
+}