1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.functor.example.kata.four; 18 19 import org.apache.commons.functor.UnaryFunction; 20 21 /** 22 * Evaluates to the absolute Integer value of the Number-valued 23 * input parameter. 24 * 25 * @version $Revision: 665786 $ $Date: 2008-06-09 19:17:39 +0200 (Mon, 09 Jun 2008) $ 26 * @author Rodney Waldhoff 27 */ 28 public final class Abs implements UnaryFunction<Number, Integer> { 29 30 public Integer evaluate(Number num) { 31 return new Integer(Math.abs(num.intValue())); 32 } 33 34 public static final Abs instance() { 35 return INSTANCE; 36 } 37 38 private static final Abs INSTANCE = new Abs(); 39 }