visad

Class PromiscuousUnit

java.lang.Object

visad.Unit

visad.PromiscuousUnit

All Implemented Interfaces:

java.io.Serializable

public final class PromiscuousUnit
extends Unit

PromiscuousUnit is the VisAD class for units that are convertable with any other Unit. Instances are immutable.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
Unit	divide(PromiscuousUnit that)
Unit	divide(Unit that) Divide this unit by another unit.
boolean	equals(Unit unit) Indicates whether or not this instance is equal to a unit.
java.lang.String	getDefinition() Returns the definition of this unit.
DerivedUnit	getDerivedUnit() Returns the dimensionless unit one with the identifier "1".
int	hashCode() Returns the hash code of this instance.
boolean	isConvertible(Unit unit) Indicate whether this unit is convertible with another unit.
boolean	isDimensionless() Indicates if this instance is dimensionless.
Unit	log(double base) Returns the logarithmic unit that has this unit as its reference level.
Unit	multiply(Unit that) Multiply this unit by another unit.
Unit	pow(double power) Raise a unit to a power.
Unit	pow(int power) Raise this unit to a power.
Unit	root(int root) Returns the N-th root of this unit.
Unit	scale(double amount) Scale this unit by an amount.
Unit	shift(double offset) Shift this unit by an amount.
double[]	toThat(double[] values, Unit that) Convert values from this unit to another unit.
float[]	toThat(float[] values, Unit that) Convert values from this unit to another unit.
double[]	toThis(double[] values, Unit that) Convert values to this unit from another unit.
float[]	toThis(float[] values, Unit that) Convert values to this unit from another unit.

Methods inherited from class visad.Unit

canConvert, canConvertArray, clone, convertTuple, convertTuple, convertTuple, convertTuple, copyUnitsArray, equals, getAbsoluteUnit, getIdentifier, main, sqrt, toString, toThat, toThat, toThat, toThis, toThis, toThis, transformUnits, transformUnits, transformUnits, transformUnits

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

isDimensionless

public boolean isDimensionless()

Indicates if this instance is dimensionless. A unit is dimensionless if it is a measure of a dimensionless quantity like angle or concentration. Examples of dimensionless units include radian, degree, steradian, and "g/kg".

This implementation always returns false because the typical use of this method is to determine whether or not a function of dimensionless values (e.g. sin(), log()) may be applied to values in this unit and such functions shouldn't be applied to values in this unit. Instead, the client should ensure that the values are in a true, dimensionless unit.

Specified by:

isDimensionless in class Unit

Returns:

True if an only if this unit is dimensionless.

getDefinition

public java.lang.String getDefinition()

Returns the definition of this unit. For promiscuous units, this is the same as the identifier.

Specified by:

getDefinition in class Unit

Returns:

The definition of this unit. Won't be null but may be empty.

scale

public Unit scale(double amount)
           throws UnitException

Description copied from class: Unit

Scale this unit by an amount.

Specified by:

scale in class Unit

Parameters:

amount - The amount by which to scale this unit. E.g. Unit yard = meter.scale(0.9144);

Returns:

A unit equal to this instance scaled by the given amount.

Throws:

UnitException - This unit cannot be scaled.

shift

public Unit shift(double offset)
           throws UnitException

Description copied from class: Unit

Shift this unit by an amount.

Specified by:

shift in class Unit

Parameters:

offset - The amount by which to shift this unit. E.g. Unit celsius = kelvin.shift(273.15);

Returns:

A unit equal to this instance with the origin shifted by the given amount.

Throws:

UnitException - The unit subclass is unknown.

log

public Unit log(double base)

Description copied from class: Unit

Returns the logarithmic unit that has this unit as its reference level. Not all units can be used as a reference level.

Specified by:

log in class Unit

Parameters:

base - The logarithmic base: one of 2, Math.E, or 10.

Returns:

The logarithmic unit that has this instance as its reference level.

pow

public Unit pow(int power)

Description copied from class: Unit

Raise this unit to a power.

Specified by:

pow in class Unit

Parameters:

power - The power to raise this unit by.

Returns:

The resulting unit. require: The unit is not an offset unit. promise: The unit has not been modified.

root

public Unit root(int root)

Description copied from class: Unit

Returns the N-th root of this unit.

Specified by:

root in class Unit

Parameters:

root - The root to take (e.g. 2 means square root). Must not be zero.

Returns:

The unit corresponding to the root-th root of this unit. require: The unit is not an offset unit. promise: The unit has not been modified.

pow

public Unit pow(double power)

Description copied from class: Unit

Raise a unit to a power.

Specified by:

pow in class Unit

Parameters:

power - The power to raise this unit by. If this unit is not dimensionless, then the value must be integral.

Returns:

The unit resulting from raising this unit to power.

multiply

public Unit multiply(Unit that)

Description copied from class: Unit

Multiply this unit by another unit.

Specified by:

multiply in class Unit

Parameters:

that - The given unit to multiply this unit by.

Returns:

The resulting unit.

divide

public Unit divide(Unit that)
            throws UnitException

Description copied from class: Unit

Divide this unit by another unit.

Specified by:

divide in class Unit

Parameters:

that - The unit to divide into this unit.

Returns:

The quotient of the two units. promise: Neither unit has been modified.

Throws:

UnitException - It's meaningless to divide these units.

divide

public Unit divide(PromiscuousUnit that)

toThis

public double[] toThis(double[] values,
                       Unit that)

Description copied from class: Unit

Convert values to this unit from another unit.

Specified by:

toThis in class Unit

Parameters:

values - Values in units of the other unit.

that - The other unit.

Returns:

Values in this unit. require: The units are convertible. promise: Neither unit has been modified.

toThat

public double[] toThat(double[] values,
                       Unit that)

Description copied from class: Unit

Convert values from this unit to another unit.

Specified by:

toThat in class Unit

Parameters:

values - The values in this unit.

that - The other unit.

Returns:

Values converted to the other unit from this unit. require: The units are convertible. promise: Neither unit has been modified.

toThis

public float[] toThis(float[] values,
                      Unit that)

Description copied from class: Unit

Convert values to this unit from another unit.

Specified by:

toThis in class Unit

Parameters:

values - Values in units of the other unit.

that - The other unit.

Returns:

Values in this unit. require: The units are convertible. promise: Neither unit has been modified.

toThat

public float[] toThat(float[] values,
                      Unit that)

Description copied from class: Unit

Convert values from this unit to another unit.

Specified by:

toThat in class Unit

Parameters:

values - The values in this unit.

that - The other unit.

Returns:

Values converted to the other unit from this unit. require: The units are convertible. promise: Neither unit has been modified.

isConvertible

public boolean isConvertible(Unit unit)

Indicate whether this unit is convertible with another unit. A PromiscuousUnit is always convertible with another unit.

Specified by:

isConvertible in class Unit

Parameters:

unit - The other unit.

Returns:

True, always.

equals

public boolean equals(Unit unit)

Description copied from class: Unit

Indicates whether or not this instance is equal to a unit.

Specified by:

equals in class Unit

Parameters:

unit - The unit.

Returns:

true if and only if this instance equals the unit.

hashCode

public int hashCode()

Returns the hash code of this instance. Object.hashCode() should be overridden whenever Object.equals(Object) is.

Specified by:

hashCode in class Unit

Returns:

The hash code of this instance (includes the values).

getDerivedUnit

public DerivedUnit getDerivedUnit()

Returns the dimensionless unit one with the identifier "1".

Specified by:

getDerivedUnit in class Unit

Returns:

The derived unit that underlies this unit.