001/* 002 * Unit Systems 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, are permitted provided that the following conditions are met: 008 * 009 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 010 * 011 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 012 * 013 * 3. Neither the name of JSR-363 nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 014 * 015 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 016 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 017 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 018 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 019 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 020 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 021 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 022 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 023 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 024 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 025 */ 026package systems.uom.common.internal; 027 028import java.util.Collection; 029import java.util.HashMap; 030import java.util.Map; 031 032import javax.measure.spi.SystemOfUnits; 033import javax.measure.spi.SystemOfUnitsService; 034 035import systems.uom.common.CGS; 036import systems.uom.common.Imperial; 037import systems.uom.common.USCustomary; 038import tec.uom.lib.common.function.IntPrioritySupplier; 039 040/** 041 * @author <a href="mailto:units@catmedia.us">Werner Keil</a> 042 * @version 0.7, March 4, 2017 043 */ 044public class CommonSystemService implements SystemOfUnitsService, 045 IntPrioritySupplier { 046 static final int PRIO = 100; 047 private static final String DEFAULT_SYSTEM_NAME = "USCustomary"; 048 049 private final Map<String, SystemOfUnits> souMap = new HashMap<>(); 050 private final Map<String, String> aliases = new HashMap<>(); 051 052 public CommonSystemService() { 053 souMap.put("Imperial", Imperial.getInstance()); 054 souMap.put(DEFAULT_SYSTEM_NAME, USCustomary.getInstance()); 055 souMap.put("CGS", CGS.getInstance()); 056 aliases.put("US", DEFAULT_SYSTEM_NAME); 057 aliases.put("Centimetre–gram–second", "CGS"); 058 } 059 060 public Collection<SystemOfUnits> getAvailableSystemsOfUnits() { 061 return souMap.values(); 062 } 063 064 @Override 065 public SystemOfUnits getSystemOfUnits() { 066 return getSystemOfUnits(DEFAULT_SYSTEM_NAME); 067 // We assume US Customary as the more common system here 068 } 069 070 @Override 071 public SystemOfUnits getSystemOfUnits(String name) { 072 String alias = aliases.get(name); 073 if (alias != null && alias.length() > 0) { 074 return souMap.get(alias); 075 } 076 return souMap.get(name); 077 } 078 079 @Override 080 public int getPriority() { 081 return PRIO; 082 } 083}