001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.reef.examples.group.utils.math; 020 021/** 022 * Abstract base class for {@link Vector} implementations. 023 * <p> 024 * The only methods to be implemented by subclasses are get, set and size. 025 */ 026public abstract class AbstractVector extends AbstractImmutableVector implements Vector { 027 028 @Override 029 public abstract void set(int i, double v); 030 031 032 @Override 033 public void add(final Vector that) { 034 for (int index = 0; index < this.size(); ++index) { 035 this.set(index, this.get(index) + that.get(index)); 036 } 037 } 038 039 @Override 040 public void multAdd(final double factor, final ImmutableVector that) { 041 for (int index = 0; index < this.size(); ++index) { 042 this.set(index, this.get(index) + factor * that.get(index)); 043 } 044 } 045 046 @Override 047 public void scale(final double factor) { 048 for (int index = 0; index < this.size(); ++index) { 049 this.set(index, this.get(index) * factor); 050 } 051 } 052 053 054 @Override 055 public void normalize() { 056 final double factor = 1.0 / this.norm2(); 057 this.scale(factor); 058 } 059 060 061}