001/*
002 * Units of Measurement Systems
003 * Copyright (c) 2005-2020, Jean-Marie Dautelle, Werner Keil and others.
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-385, Units of Measurement nor the names of their contributors may be used to
017 *    endorse or promote products 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 systems.uom.common.spi;
031
032import java.util.Collection;
033import java.util.HashMap;
034import java.util.Map;
035
036import javax.measure.spi.SystemOfUnits;
037import systems.uom.common.CGS;
038import systems.uom.common.Imperial;
039import systems.uom.common.USCustomary;
040import tech.units.indriya.spi.AbstractSystemOfUnitsService;
041
042/**
043 * @author <a href="mailto:units@catmedia.us">Werner Keil</a>
044 * @version 1.2, January 11, 2020
045 */
046public class CommonSystemService extends AbstractSystemOfUnitsService {
047        private static final String DEFAULT_SYSTEM_NAME = "USCustomary";
048
049        private final Map<String, String> aliases = new HashMap<>();
050
051        public CommonSystemService() {
052                souMap.put("Imperial", Imperial.getInstance());
053                souMap.put(DEFAULT_SYSTEM_NAME, USCustomary.getInstance());
054                souMap.put("CGS", CGS.getInstance());
055                aliases.put("US", DEFAULT_SYSTEM_NAME);
056                aliases.put("Centimetre–gram–second", "CGS");
057        }
058
059        public Collection<SystemOfUnits> getAvailableSystemsOfUnits() {
060                return souMap.values();
061        }
062
063        @Override
064        public SystemOfUnits getSystemOfUnits() {
065                return getSystemOfUnits(DEFAULT_SYSTEM_NAME); // We assume US Customary as the more
066                // common system here
067        }
068
069        @Override
070        public SystemOfUnits getSystemOfUnits(String name) {
071                String alias = aliases.get(name);
072                if (alias != null && alias.length() > 0) {
073                        return souMap.get(alias);
074                }
075                return souMap.get(name);
076        }
077}