AccelerationUnit.java
package org.djunits.unit;
import static org.djunits.unit.unitsystem.UnitSystem.CGS;
import static org.djunits.unit.unitsystem.UnitSystem.IMPERIAL;
import static org.djunits.unit.unitsystem.UnitSystem.SI_DERIVED;
import org.djunits.unit.unitsystem.UnitSystem;
/**
* Standard acceleration unit based on distance and time.
* <p>
* Copyright (c) 2015-2018 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: 2018-01-28 03:17:44 +0100 (Sun, 28 Jan 2018) $, @version $Revision: 256 $, by $Author: averbraeck $,
* initial version May 15, 2014 <br>
* @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
*/
public class AccelerationUnit extends LinearUnit<AccelerationUnit>
{
/** */
private static final long serialVersionUID = 20140607L;
/** the actual length unit, e.g. KILOMETER. */
private final LengthUnit lengthUnit;
/** the actual time unit, e.g. HOUR. */
private final DurationUnit durationUnit;
/** The SI unit for acceleration is m/s^2. */
public static final AccelerationUnit SI;
/** m/s^2. */
public static final AccelerationUnit METER_PER_SECOND_2;
/** km/h^2. */
public static final AccelerationUnit KM_PER_HOUR_2;
/** ft/s^2. */
public static final AccelerationUnit FOOT_PER_SECOND_2;
/** in/s^2. */
public static final AccelerationUnit INCH_PER_SECOND_2;
/** mi/h^2. */
public static final AccelerationUnit MILE_PER_HOUR_2;
/** mi/s^2. */
public static final AccelerationUnit MILE_PER_SECOND_2;
/** kt/s. */
public static final AccelerationUnit KNOT_PER_SECOND;
/** mi/h/s. */
public static final AccelerationUnit MILE_PER_HOUR_PER_SECOND;
/** standard gravity. */
public static final AccelerationUnit STANDARD_GRAVITY;
/** standard gravity. */
public static final AccelerationUnit GAL;
static
{
SI = new AccelerationUnit(LengthUnit.METER, DurationUnit.SECOND, "AccelerationUnit.meter_per_second_squared",
"AccelerationUnit.m/s^2", SI_DERIVED, true);
METER_PER_SECOND_2 = SI;
KM_PER_HOUR_2 = new AccelerationUnit(LengthUnit.KILOMETER, DurationUnit.HOUR, "AccelerationUnit.km_per_hour_squared",
"AccelerationUnit.km/h^2", SI_DERIVED, true);
FOOT_PER_SECOND_2 = new AccelerationUnit(LengthUnit.FOOT, DurationUnit.SECOND,
"AccelerationUnit.foot_per_second_squared", "AccelerationUnit.ft/s^2", IMPERIAL, true);
INCH_PER_SECOND_2 = new AccelerationUnit(LengthUnit.INCH, DurationUnit.SECOND,
"AccelerationUnit.inch_per_second_squared", "AccelerationUnit.in/s^2", IMPERIAL, true);
MILE_PER_HOUR_2 = new AccelerationUnit(LengthUnit.MILE, DurationUnit.HOUR, "AccelerationUnit.mile_per_hour_squared",
"AccelerationUnit.mi/h^2", IMPERIAL, true);
MILE_PER_SECOND_2 = new AccelerationUnit(LengthUnit.MILE, DurationUnit.SECOND,
"AccelerationUnit.mile_per_second_squared", "AccelerationUnit.mi/s^2", IMPERIAL, true);
KNOT_PER_SECOND = new AccelerationUnit(SpeedUnit.KNOT, DurationUnit.SECOND, "AccelerationUnit.knot_per_second",
"AccelerationUnit.kt/s", IMPERIAL, true);
MILE_PER_HOUR_PER_SECOND = new AccelerationUnit(SpeedUnit.MILE_PER_HOUR, DurationUnit.SECOND,
"AccelerationUnit.mile_per_hour_per_second", "AccelerationUnit.mi/h/s", IMPERIAL, true);
STANDARD_GRAVITY = new AccelerationUnit("AccelerationUnit.standard_gravity", "AccelerationUnit.g", SI_DERIVED,
METER_PER_SECOND_2, 9.80665, true);
GAL = new AccelerationUnit(LengthUnit.CENTIMETER, DurationUnit.SECOND, "AccelerationUnit.gal", "AccelerationUnit.Gal",
CGS, true);
}
/**
* Define acceleration unit based on length and time. You can define units like meter/second^2 here.
* @param lengthUnit the unit of length for the acceleration unit, e.g., meter
* @param durationUnit the unit of time for the acceleration unit, e.g., second
* @param nameOrNameKey if standardUnit: the key to the locale file for the long name of the unit, otherwise the name itself
* @param abbreviationOrAbbreviationKey if standardUnit: the key to the locale file for the abbreviation of the unit,
* otherwise the abbreviation itself
* @param unitSystem the unit system, e.g. SI or Imperial
* @param standardUnit indicates whether it is a standard unit with a definition in the locale, or a user-defined unit
*/
private AccelerationUnit(final LengthUnit lengthUnit, final DurationUnit durationUnit, final String nameOrNameKey,
final String abbreviationOrAbbreviationKey, final UnitSystem unitSystem, final boolean standardUnit)
{
super(nameOrNameKey, abbreviationOrAbbreviationKey, unitSystem, METER_PER_SECOND_2,
lengthUnit.getScaleFactor() / (durationUnit.getScaleFactor() * durationUnit.getScaleFactor()), standardUnit);
this.lengthUnit = lengthUnit;
this.durationUnit = durationUnit;
}
/**
* Define user defined acceleration unit based on length and time. You can define units like meter/second^2 here.
* @param lengthUnit the unit of length for the acceleration unit, e.g., meter
* @param durationUnit the unit of time for the acceleration unit, e.g., second
* @param name the long name of the unit
* @param abbreviation the abbreviation of the unit
* @param unitSystem the unit system, e.g. SI or Imperial
*/
public AccelerationUnit(final LengthUnit lengthUnit, final DurationUnit durationUnit, final String name,
final String abbreviation, final UnitSystem unitSystem)
{
this(lengthUnit, durationUnit, name, abbreviation, unitSystem, false);
}
/**
* Define acceleration unit based on speed and time. You can define units like (mile/hour)/second here.
* @param speedUnit the unit of speed for the acceleration unit, e.g., knot
* @param durationUnit the unit of time for the acceleration unit, e.g., second
* @param nameOrNameKey if standardUnit: the key to the locale file for the long name of the unit, otherwise the name itself
* @param abbreviationOrAbbreviationKey if standardUnit: the key to the locale file for the abbreviation of the unit,
* otherwise the abbreviation itself
* @param unitSystem the unit system, e.g. SI or Imperial
* @param standardUnit indicates whether it is a standard unit with a definition in the locale, or a user-defined unit
*/
private AccelerationUnit(final SpeedUnit speedUnit, final DurationUnit durationUnit, final String nameOrNameKey,
final String abbreviationOrAbbreviationKey, final UnitSystem unitSystem, final boolean standardUnit)
{
super(nameOrNameKey, abbreviationOrAbbreviationKey, unitSystem, METER_PER_SECOND_2,
speedUnit.getScaleFactor() / durationUnit.getScaleFactor(), standardUnit);
this.lengthUnit = speedUnit.getLengthUnit();
this.durationUnit = durationUnit;
}
/**
* Define user-defined acceleration unit based on speed and time. You can define units like (mile/hour)/second here.
* @param speedUnit the unit of speed for the acceleration unit, e.g., knot
* @param durationUnit the unit of time for the acceleration unit, e.g., second
* @param name the long name of the unit
* @param abbreviation the abbreviation of the unit
* @param unitSystem the unit system, e.g. SI or Imperial
*/
public AccelerationUnit(final SpeedUnit speedUnit, final DurationUnit durationUnit, final String name,
final String abbreviation, final UnitSystem unitSystem)
{
this(speedUnit, durationUnit, name, abbreviation, unitSystem, false);
}
/**
* Build a unit with a conversion factor to another unit.
* @param nameOrNameKey if standardUnit: the key to the locale file for the long name of the unit, otherwise the name itself
* @param abbreviationOrAbbreviationKey if standardUnit: the key to the locale file for the abbreviation of the unit,
* otherwise the abbreviation itself
* @param unitSystem the unit system, e.g. SI or Imperial
* @param referenceUnit the unit to convert to
* @param scaleFactorToReferenceUnit multiply a value in this unit by the factor to convert to the given reference unit
* @param standardUnit indicates whether it is a standard unit with a definition in the locale, or a user-defined unit
*/
private AccelerationUnit(final String nameOrNameKey, final String abbreviationOrAbbreviationKey,
final UnitSystem unitSystem, final AccelerationUnit referenceUnit, final double scaleFactorToReferenceUnit,
final boolean standardUnit)
{
super(nameOrNameKey, abbreviationOrAbbreviationKey, unitSystem, referenceUnit, scaleFactorToReferenceUnit,
standardUnit);
this.lengthUnit = referenceUnit.getLengthUnit();
this.durationUnit = referenceUnit.getDurationUnit();
}
/**
* Build a user-defined unit with a conversion factor to another unit.
* @param name the long name of the unit
* @param abbreviation the abbreviation of the unit
* @param unitSystem the unit system, e.g. SI or Imperial
* @param referenceUnit the unit to convert to
* @param scaleFactorToReferenceUnit multiply a value in this unit by the factor to convert to the given reference unit
*/
public AccelerationUnit(final String name, final String abbreviation, final UnitSystem unitSystem,
final AccelerationUnit referenceUnit, final double scaleFactorToReferenceUnit)
{
this(name, abbreviation, unitSystem, referenceUnit, scaleFactorToReferenceUnit, false);
}
/**
* @return lengthUnit
*/
public final LengthUnit getLengthUnit()
{
return this.lengthUnit;
}
/**
* @return durationUnit
*/
public final DurationUnit getDurationUnit()
{
return this.durationUnit;
}
/** {@inheritDoc} */
@Override
public final AccelerationUnit getStandardUnit()
{
return METER_PER_SECOND_2;
}
/** {@inheritDoc} */
@Override
public final String getSICoefficientsString()
{
return "m/s2";
}
}