package org.lambda3.indra.composition; /*- * ==========================License-Start============================= * Indra Core Module * -------------------------------------------------------------------- * Copyright (C) 2016 - 2017 Lambda^3 * -------------------------------------------------------------------- * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * ==========================License-End=============================== */ import org.apache.commons.math3.linear.RealVector; import java.util.List; public class SumVectorComposer implements VectorComposer { @Override public RealVector compose(List<RealVector> vectors) { if (vectors.isEmpty()) { return null; } else if (vectors.size() == 1) { return vectors.get(0); } else { RealVector sum = vectors.get(0).add(vectors.get(1)); for (int i = 2; i < vectors.size(); i++) { sum = sum.add(vectors.get(i)); } return sum; } } }