FloatPosition.java
package org.djunits.value.vfloat.scalar;
import java.util.regex.Matcher;
import org.djunits.unit.LengthUnit;
import org.djunits.unit.PositionUnit;
import org.djunits.unit.Unit;
/**
* Easy access methods for the Position FloatScalar. Instead of:
*
* <pre>
* FloatScalar.Abs<PositionUnit> value = new FloatScalar.Abs<PositionUnit>(100.0, PositionUnit.SI);
* </pre>
*
* we can now write:
*
* <pre>
* FloatPosition value = new FloatPosition(100.0, PositionUnit.SI);
* </pre>
*
* The compiler will automatically recognize which units belong to which quantity, and whether the quantity type and the unit
* used are compatible.
* <p>
* Copyright (c) 2013-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. <br>
* All rights reserved. <br>
* BSD-style license. See <a href="http://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
* <p>
* $LastChangedDate: 2019-02-27 23:44:43 +0100 (Wed, 27 Feb 2019) $, @version $Revision: 333 $, by $Author: averbraeck $,
* initial version Sep 1, 2015 <br>
* @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
* @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
*/
public class FloatPosition extends AbstractFloatScalarAbs<PositionUnit, FloatPosition, LengthUnit, FloatLength>
{
/** */
private static final long serialVersionUID = 20150901L;
/** constant with value zero. */
public static final FloatPosition ZERO = new FloatPosition(0.0f, PositionUnit.BASE);
/**
* Construct FloatPosition scalar.
* @param value float value
* @param unit unit for the float value
*/
public FloatPosition(final float value, final PositionUnit unit)
{
super(value, unit);
}
/**
* Construct FloatPosition scalar using a double value.
* @param value double value
* @param unit unit for the resulting float value
*/
public FloatPosition(final double value, final PositionUnit unit)
{
super((float) value, unit);
}
/**
* Construct FloatPosition scalar.
* @param value Scalar from which to construct this instance
*/
public FloatPosition(final FloatPosition value)
{
super(value);
}
/** {@inheritDoc} */
@Override
public final FloatPosition instantiateAbs(final float value, final PositionUnit unit)
{
return new FloatPosition(value, unit);
}
/** {@inheritDoc} */
@Override
public final FloatLength instantiateRel(final float value, final LengthUnit unit)
{
return new FloatLength(value, unit);
}
/**
* Construct FloatPosition scalar.
* @param value float value in BASE units
* @return the new scalar with the BASE value
*/
public static final FloatPosition createSI(final float value)
{
return new FloatPosition(value, PositionUnit.BASE);
}
/**
* Interpolate between two values.
* @param zero the low value
* @param one the high value
* @param ratio the ratio between 0 and 1, inclusive
* @return a Scalar at the ratio between
*/
public static FloatPosition interpolate(final FloatPosition zero, final FloatPosition one, final float ratio)
{
return new FloatPosition(zero.getInUnit() * (1 - ratio) + one.getInUnit(zero.getUnit()) * ratio, zero.getUnit());
}
/**
* Return the maximum value of two absolute scalars.
* @param a1 the first scalar
* @param a2 the second scalar
* @return the maximum value of two absolute scalars
*/
public static FloatPosition max(final FloatPosition a1, final FloatPosition a2)
{
return (a1.gt(a2)) ? a1 : a2;
}
/**
* Return the maximum value of more than two absolute scalars.
* @param a1 the first scalar
* @param a2 the second scalar
* @param an the other scalars
* @return the maximum value of more than two absolute scalars
*/
public static FloatPosition max(final FloatPosition a1, final FloatPosition a2, final FloatPosition... an)
{
FloatPosition maxa = (a1.gt(a2)) ? a1 : a2;
for (FloatPosition a : an)
{
if (a.gt(maxa))
{
maxa = a;
}
}
return maxa;
}
/**
* Return the minimum value of two absolute scalars.
* @param a1 the first scalar
* @param a2 the second scalar
* @return the minimum value of two absolute scalars
*/
public static FloatPosition min(final FloatPosition a1, final FloatPosition a2)
{
return (a1.lt(a2)) ? a1 : a2;
}
/**
* Return the minimum value of more than two absolute scalars.
* @param a1 the first scalar
* @param a2 the second scalar
* @param an the other scalars
* @return the minimum value of more than two absolute scalars
*/
public static FloatPosition min(final FloatPosition a1, final FloatPosition a2, final FloatPosition... an)
{
FloatPosition mina = (a1.lt(a2)) ? a1 : a2;
for (FloatPosition a : an)
{
if (a.lt(mina))
{
mina = a;
}
}
return mina;
}
/**
* Returns a FloatPosition representation of a textual representation of a value with a unit. The String representation that
* can be parsed is the double value in the unit, followed by the official abbreviation of the unit. Spaces are allowed, but
* not necessary, between the value and the unit.
* @param text String; the textual representation to parse into a FloatPosition
* @return the String representation of the value in its unit, followed by the official abbreviation of the unit
* @throws IllegalArgumentException when the text cannot be parsed
*/
public static FloatPosition valueOf(final String text) throws IllegalArgumentException
{
if (text == null || text.length() == 0)
{
throw new IllegalArgumentException("Error parsing FloatPosition -- null or empty argument");
}
Matcher matcher = NUMBER_PATTERN.matcher(text);
if (matcher.find())
{
int index = matcher.end();
try
{
String unitString = text.substring(index).trim();
String valueString = text.substring(0, index).trim();
for (PositionUnit unit : Unit.getUnits(PositionUnit.class))
{
if (unit.getDefaultLocaleTextualRepresentations().contains(unitString))
{
float f = Float.parseFloat(valueString);
return new FloatPosition(f, unit);
}
}
}
catch (Exception exception)
{
throw new IllegalArgumentException("Error parsing FloatPosition from " + text, exception);
}
}
throw new IllegalArgumentException("Error parsing FloatPosition from " + text);
}
}