001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.functor.example.kata.four; 018 019 import org.apache.commons.functor.UnaryFunction; 020 021 /** 022 * Evaluates to the absolute Integer value of the Number-valued 023 * input parameter. 024 * 025 * @version $Revision: 665786 $ $Date: 2008-06-09 19:17:39 +0200 (Mon, 09 Jun 2008) $ 026 * @author Rodney Waldhoff 027 */ 028 public final class Abs implements UnaryFunction<Number, Integer> { 029 030 public Integer evaluate(Number num) { 031 return new Integer(Math.abs(num.intValue())); 032 } 033 034 public static final Abs instance() { 035 return INSTANCE; 036 } 037 038 private static final Abs INSTANCE = new Abs(); 039 }