001/*
002 * Units of Measurement Systems
003 * Copyright (c) 2005-2021, 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.ucum.spi;
031
032import java.util.Collection;
033import java.util.HashMap;
034import java.util.Map;
035
036import javax.measure.spi.SystemOfUnits;
037import javax.measure.spi.SystemOfUnitsService;
038
039import systems.uom.ucum.UCUM;
040import tech.uom.lib.common.function.IntPrioritySupplier;
041
042/**
043 * @author <a href="mailto:werner@uom.systems">Werner Keil</a>
044 * @version 1.1, January 11, 2020
045 */
046public final class UCUMSystemService implements SystemOfUnitsService,
047        IntPrioritySupplier {
048    static final int PRIO = 100;
049    private static final String DEFAULT_SYSTEM_NAME = "UCUM";
050
051    private final Map<String, SystemOfUnits> souMap = new HashMap<>();
052    private final Map<String, String> aliases = new HashMap<>();
053
054    public UCUMSystemService() {
055        souMap.put(DEFAULT_SYSTEM_NAME, UCUM.getInstance());
056        aliases.put("Unified Code for Units of Measure", DEFAULT_SYSTEM_NAME);
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); 
066    }
067
068    @Override
069    public SystemOfUnits getSystemOfUnits(String name) {
070                String alias = aliases.get(name);
071                if (alias != null && alias.length() > 0) {
072                    return souMap.get(alias);
073                }
074                return souMap.get(name);
075    }
076
077    @Override
078    public int getPriority() {
079        return PRIO;
080    }
081}