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// 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 double[] data;
protected int size = 0;
private static int initialCapacity(int hint) {
for (int capacity = 64; capacity < 4096; capacity *= 2) {
if (hint <= capacity) {
return capacity;
}
}
return 4096;
}
Normalizer(int sizeHint) {
this.data = new double[initialCapacity(sizeHint)];
}
int addInput(double value) {
if (size == data.length) {
int newSize = size * 2;
var tmp = new double[newSize];
System.arraycopy(data, 0, tmp, 0, size);
this.data = tmp;
}
data[size] = value;
return size++;
}
double getOutput(int index) { return data[index]; }
abstract void normalize();
abstract String normalizing();
}
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