001/* 002 * Units of Measurement Implementation for Java SE 003 * Copyright (c) 2005-2017, Jean-Marie Dautelle, Werner Keil, V2COM. 004 * 005 * All rights reserved. 006 * 007 * Redistribution and use in source and binary forms, with or without modification, 008 * are permitted provided that the following conditions are met: 009 * 010 * 1. Redistributions of source code must retain the above copyright notice, 011 * this list of conditions and the following disclaimer. 012 * 013 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions 014 * and the following disclaimer in the documentation and/or other materials provided with the distribution. 015 * 016 * 3. Neither the name of JSR-363 nor the names of its contributors may be used to endorse or promote products 017 * derived from this software without specific prior written permission. 018 * 019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 021 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 023 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 026 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 028 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 029 */ 030package tec.uom.se.function; 031 032import java.util.Comparator; 033 034import javax.measure.Quantity; 035 036/** 037 * Comparator to sort by natural order, looking both the unit and the value. 038 * 039 * @author <a href="mailto:werner@uom.technology">Werner Keil</a> 040 * @author <a href="mailto:otaviopolianasantana@gmail.com">Otavio Santana</a> 041 * @version 1.0 042 * @return <b>Given:</b> 043 * <p> 044 * Quantity<Time> day = timeFactory.create(1, Units.DAY); 045 * </p> 046 * <p> 047 * Quantity<Time> hours = timeFactory.create(18, Units.HOUR); 048 * </p> 049 * <p> 050 * Quantity<Time> minutes = timeFactory.create(15, Units.HOUR); 051 * </p> 052 * <p> 053 * Quantity<Time> seconds = timeFactory.create(100, Units.HOUR); 054 * </p> 055 * will return: seconds, minutes, hours, day 056 * @since 1.0 057 */ 058public class NaturalOrder<T extends Quantity<T>> implements Comparator<Quantity<T>> { 059 060 @Override 061 public int compare(Quantity<T> q1, Quantity<T> q2) { 062 if (q1.getUnit().equals(q2.getUnit())) { 063 return Double.compare(q1.getValue().doubleValue(), q2.getValue().doubleValue()); 064 } 065 return Double.compare(q1.getValue().doubleValue(), q2.to(q1.getUnit()).getValue().doubleValue()); 066 } 067}