1 package org.djunits.unit;
2
3 import org.djunits.unit.unitsystem.UnitSystem;
4
5 /**
6 * Helper class to create arbitrary SI units.
7 * <p>
8 * Copyright (c) 2015-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
9 * BSD-style license. See <a href="http://djunits.org/docs/license.html">DJUNITS License</a>.
10 * <p>
11 * $LastChangedDate: 2019-03-02 19:06:46 +0100 (Sat, 02 Mar 2019) $, @version $Revision: 342 $, by $Author: averbraeck $,
12 * initial version Jun 15, 2014 <br>
13 * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
14 */
15 public class SIUnit extends Unit<SIUnit>
16 {
17 /** */
18 private static final long serialVersionUID = 20140615L;
19
20 /**
21 * Create an arbitrary SI unit based on a coefficient string, such as m3/cd2.
22 * @param siCoefficientString String; textual description of the unit.
23 */
24 public SIUnit(final String siCoefficientString)
25 {
26 super(siCoefficientString, siCoefficientString, UnitSystem.SI_DERIVED);
27 }
28
29 /** {@inheritDoc} */
30 @Override
31 public final SIUnit getStandardUnit()
32 {
33 return this;
34 }
35
36 /** {@inheritDoc} */
37 @Override
38 public final String getSICoefficientsString()
39 {
40 if (null == this.getAbbreviationKey())
41 {
42 return this.getAbbreviation().replace("SIUnit.", ""); // FIXME: this is horrible / PK
43 // We need a better way to determine if a unit is supposed to have localization information.
44 }
45 return this.getAbbreviationKey().replace("SIUnit.", "");
46 }
47
48 /** {@inheritDoc} */
49 @SuppressWarnings("checkstyle:needbraces")
50 @Override
51 public boolean equalsIgnoreNaming(final Object obj)
52 {
53 // naming is done with a normalized SI-String, which should be equal when te SI units are equal.
54 // Therefore, we can call the equals() method that compares class, name and abbreviation.
55 return equals(obj);
56 }
57
58 }