ElectricalResistanceUnit.java
package org.djunits.unit;
import static org.djunits.unit.unitsystem.UnitSystem.CGS_EMU;
import static org.djunits.unit.unitsystem.UnitSystem.CGS_ESU;
import static org.djunits.unit.unitsystem.UnitSystem.SI_DERIVED;
import org.djunits.unit.unitsystem.UnitSystem;
/**
* The units of electrical resistance.
* <p>
* Copyright (c) 2015-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
* BSD-style license. See <a href="http://djunits.org/docs/license.html">DJUNITS License</a>.
* <p>
* $LastChangedDate: 2019-01-18 00:35:01 +0100 (Fri, 18 Jan 2019) $, @version $Revision: 324 $, by $Author: averbraeck $,
* initial version May 15, 2014 <br>
* @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
*/
public class ElectricalResistanceUnit extends LinearUnit<ElectricalResistanceUnit>
{
/** */
private static final long serialVersionUID = 20140607L;
/** the unit of mass for the electrical resistance unit, e.g., kilogram. */
private final MassUnit massUnit;
/** the unit of length for the electrical resistance unit, e.g., meters. */
private final LengthUnit lengthUnit;
/** the unit of electrical current for the electrical resistance unit, e.g., Ampere. */
private final ElectricalCurrentUnit electricalCurrentUnit;
/** the unit of time for the electrical resistance unit, e.g., second. */
private final DurationUnit durationUnit;
/** The SI unit for electrical resistance is Ohm. */
public static final ElectricalResistanceUnit SI;
/** Ohm. */
public static final ElectricalResistanceUnit OHM;
/** nano-ohm. */
public static final ElectricalResistanceUnit NANOOHM;
/** micro-ohm. */
public static final ElectricalResistanceUnit MICROOHM;
/** milli-ohm. */
public static final ElectricalResistanceUnit MILLIOHM;
/** kilo-ohm. */
public static final ElectricalResistanceUnit KILOOHM;
/** mega-ohm. */
public static final ElectricalResistanceUnit MEGAOHM;
/** giga-ohm. */
public static final ElectricalResistanceUnit GIGAOHM;
/** ab-ohm. */
public static final ElectricalResistanceUnit ABOHM;
/** stat-ohm. */
public static final ElectricalResistanceUnit STATOHM;
static
{
SI = new ElectricalResistanceUnit(MassUnit.KILOGRAM, LengthUnit.METER, ElectricalCurrentUnit.AMPERE,
DurationUnit.SECOND, "ElectricalResistanceUnit.ohm_(name)", "ElectricalResistanceUnit.ohm", SI_DERIVED, true);
OHM = SI;
NANOOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.nano_ohm", "ElectricalResistanceUnit.n_ohm",
SI_DERIVED, OHM, 1.0E-9, true);
MICROOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.micro_ohm", "ElectricalResistanceUnit.mu_ohm",
SI_DERIVED, OHM, 1.0E-6, true);
MILLIOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.milli_ohm", "ElectricalResistanceUnit.m_ohm",
SI_DERIVED, OHM, 1.0E-3, true);
KILOOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.kilo_ohm", "ElectricalResistanceUnit.k_ohm",
SI_DERIVED, OHM, 1.0E3, true);
MEGAOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.mega_ohm", "ElectricalResistanceUnit.M_ohm",
SI_DERIVED, OHM, 1.0E06, true);
GIGAOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.giga_ohm", "ElectricalResistanceUnit.G_ohm",
SI_DERIVED, OHM, 1.0E9, true);
ABOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.ab_ohm", "ElectricalResistanceUnit.a_ohm", CGS_EMU, OHM,
1.0E-9, true);
STATOHM = new ElectricalResistanceUnit("ElectricalResistanceUnit.stat_ohm", "ElectricalResistanceUnit.st_ohm", CGS_ESU,
OHM, 8.987551787E11, true);
}
/**
* Define an ElectricalResistanceUnit based on its constituent base units, e.g. an Ohm = km.m^2/A^2.s^3.
* @param massUnit MassUnit; the unit of mass for the electrical resistance unit, e.g., kilogram
* @param lengthUnit LengthUnit; the unit of length for the electrical resistance unit, e.g., meter
* @param electricalCurrentUnit ElectricalCurrentUnit; the unit of electrical current for the electrical resistance unit,
* e.g., Ampere
* @param durationUnit DurationUnit; the unit of time for the electrical resistance unit, e.g., second
* @param nameOrNameKey String; if standardUnit: the key to the locale file for the long name of the unit, otherwise the
* name itself
* @param abbreviationOrAbbreviationKey String; if standardUnit: the key to the locale file for the abbreviation of the
* unit, otherwise the abbreviation itself
* @param unitSystem UnitSystem; the unit system, e.g. SI or Imperial
* @param standardUnit boolean; indicates whether it is a standard unit with a definition in the locale, or a user-defined
* unit
*/
@SuppressWarnings("checkstyle:parameternumber")
private ElectricalResistanceUnit(final MassUnit massUnit, final LengthUnit lengthUnit,
final ElectricalCurrentUnit electricalCurrentUnit, final DurationUnit durationUnit, final String nameOrNameKey,
final String abbreviationOrAbbreviationKey, final UnitSystem unitSystem, final boolean standardUnit)
{
super(nameOrNameKey, abbreviationOrAbbreviationKey, unitSystem, OHM,
massUnit.getScaleFactor() * lengthUnit.getScaleFactor()
* lengthUnit.getScaleFactor() / (electricalCurrentUnit.getScaleFactor()
* electricalCurrentUnit.getScaleFactor() * Math.pow(durationUnit.getScaleFactor(), 3.0)),
standardUnit);
this.massUnit = massUnit;
this.lengthUnit = lengthUnit;
this.electricalCurrentUnit = electricalCurrentUnit;
this.durationUnit = durationUnit;
}
/**
* Define a user-defined ElectricalResistanceUnit based on its constituent base units, e.g. an Ohm = km.m^2/A^2.s^3.
* @param massUnit MassUnit; the unit of mass for the electrical resistance unit, e.g., kilogram
* @param lengthUnit LengthUnit; the unit of length for the electrical resistance unit, e.g., meter
* @param electricalCurrentUnit ElectricalCurrentUnit; the unit of electrical current for the electrical resistance unit,
* e.g., Ampere
* @param durationUnit DurationUnit; the unit of time for the electrical resistance unit, e.g., second
* @param name String; the long name of the unit
* @param abbreviation String; the abbreviation of the unit
* @param unitSystem UnitSystem; the unit system, e.g. SI or Imperial
*/
public ElectricalResistanceUnit(final MassUnit massUnit, final LengthUnit lengthUnit,
final ElectricalCurrentUnit electricalCurrentUnit, final DurationUnit durationUnit, final String name,
final String abbreviation, final UnitSystem unitSystem)
{
this(massUnit, lengthUnit, electricalCurrentUnit, durationUnit, name, abbreviation, unitSystem, false);
}
/**
* Define an ElectricalResistanceUnit based on an electrical potential unit and an electrical current unit, e.g. Ohm = V/A.
* @param electricalPotentialUnit ElectricalPotentialUnit; the unit of electrical potential difference for the electrical
* resistance unit, e.g., Volt
* @param electricalCurrentUnit ElectricalCurrentUnit; the unit of electrical current for the electrical resistance unit,
* e.g., Ampere
* @param nameOrNameKey String; if standardUnit: the key to the locale file for the long name of the unit, otherwise the
* name itself
* @param abbreviationOrAbbreviationKey String; if standardUnit: the key to the locale file for the abbreviation of the
* unit, otherwise the abbreviation itself
* @param unitSystem UnitSystem; the unit system, e.g. SI or Imperial
* @param standardUnit boolean; indicates whether it is a standard unit with a definition in the locale, or a user-defined
* unit
*/
private ElectricalResistanceUnit(final ElectricalPotentialUnit electricalPotentialUnit,
final ElectricalCurrentUnit electricalCurrentUnit, final String nameOrNameKey,
final String abbreviationOrAbbreviationKey, final UnitSystem unitSystem, final boolean standardUnit)
{
super(nameOrNameKey, abbreviationOrAbbreviationKey, unitSystem, OHM,
electricalPotentialUnit.getScaleFactor() / electricalCurrentUnit.getScaleFactor(), standardUnit);
this.massUnit = electricalPotentialUnit.getMassUnit();
this.lengthUnit = electricalPotentialUnit.getLengthUnit();
this.electricalCurrentUnit = electricalCurrentUnit;
this.durationUnit = electricalPotentialUnit.getDurationUnit();
}
/**
* Define a user-defined ElectricalResistanceUnit based on an electrical potential unit and an electrical current unit, e.g.
* Ohm = V/A.
* @param electricalPotentialUnit ElectricalPotentialUnit; the unit of electrical potential difference for the electrical
* resistance unit, e.g., Volt
* @param electricalCurrentUnit ElectricalCurrentUnit; the unit of electrical current for the electrical resistance unit,
* e.g., Ampere
* @param name String; the long name of the unit
* @param abbreviation String; the abbreviation of the unit
* @param unitSystem UnitSystem; the unit system, e.g. SI or Imperial
*/
public ElectricalResistanceUnit(final ElectricalPotentialUnit electricalPotentialUnit,
final ElectricalCurrentUnit electricalCurrentUnit, final String name, final String abbreviation,
final UnitSystem unitSystem)
{
this(electricalPotentialUnit, electricalCurrentUnit, name, abbreviation, unitSystem, false);
}
/**
* Build a ElectricalResistanceUnit with a conversion factor to another ElectricalResistanceUnit.
* @param nameOrNameKey String; if standardUnit: the key to the locale file for the long name of the unit, otherwise the
* name itself
* @param abbreviationOrAbbreviationKey String; if standardUnit: the key to the locale file for the abbreviation of the
* unit, otherwise the abbreviation itself
* @param unitSystem UnitSystem; the unit system, e.g. SI or Imperial
* @param referenceUnit ElectricalResistanceUnit; the unit to convert to
* @param scaleFactorToReferenceUnit double; multiply a value in this unit by the factor to convert to the given reference
* unit
* @param standardUnit boolean; indicates whether it is a standard unit with a definition in the locale, or a user-defined
* unit
*/
private ElectricalResistanceUnit(final String nameOrNameKey, final String abbreviationOrAbbreviationKey,
final UnitSystem unitSystem, final ElectricalResistanceUnit referenceUnit, final double scaleFactorToReferenceUnit,
final boolean standardUnit)
{
super(nameOrNameKey, abbreviationOrAbbreviationKey, unitSystem, referenceUnit, scaleFactorToReferenceUnit,
standardUnit);
this.massUnit = referenceUnit.getMassUnit();
this.lengthUnit = referenceUnit.getLengthUnit();
this.electricalCurrentUnit = referenceUnit.getElectricalCurrentUnit();
this.durationUnit = referenceUnit.getDurationUnit();
}
/**
* Build a user-defined ElectricalResistanceUnit with a conversion factor to another ElectricalResistanceUnit.
* @param name String; the long name of the unit
* @param abbreviation String; the abbreviation of the unit
* @param unitSystem UnitSystem; the unit system, e.g. SI or Imperial
* @param referenceUnit ElectricalResistanceUnit; the unit to convert to
* @param scaleFactorToReferenceUnit double; multiply a value in this unit by the factor to convert to the given reference
* unit
*/
public ElectricalResistanceUnit(final String name, final String abbreviation, final UnitSystem unitSystem,
final ElectricalResistanceUnit referenceUnit, final double scaleFactorToReferenceUnit)
{
this(name, abbreviation, unitSystem, referenceUnit, scaleFactorToReferenceUnit, false);
}
/**
* @return massUnit
*/
public final MassUnit getMassUnit()
{
return this.massUnit;
}
/**
* @return lengthUnit
*/
public final LengthUnit getLengthUnit()
{
return this.lengthUnit;
}
/**
* @return electricalCurrentUnit
*/
public final ElectricalCurrentUnit getElectricalCurrentUnit()
{
return this.electricalCurrentUnit;
}
/**
* @return durationUnit
*/
public final DurationUnit getDurationUnit()
{
return this.durationUnit;
}
/** {@inheritDoc} */
@Override
public final ElectricalResistanceUnit getStandardUnit()
{
return OHM;
}
/** {@inheritDoc} */
@Override
public final String getSICoefficientsString()
{
return "kgm2/s3A2";
}
}