public function to(Unit $unit)
{
if ($unit == $this->unit || $unit->equals($this->unit)) {
return $this;
}
return self::valueOf($this->unit->getConverterTo($unit)->convert($this->value), $unit);
}
public function equals(Unit $that)
{
if ($this == $that) {
return true;
}
if (!$that instanceof self) {
return false;
}
return $this->symbol == $that->getSymbol();
}
/**
* @param Unit $unit
* @param int $root
* @param string $quantity
* @param string $symbol
*
* @return CompoundUnit
*/
public static function getRootInstance(Unit $unit, $root, $quantity = '', $symbol = '')
{
if ($unit instanceof CompoundUnit) {
$elements = [];
foreach ($unit->getElements() as $element) {
$gcd = self::gcd(abs($element->pow), $element->root * $root);
$elements[] = new CompoundElement($element->unit, $element->pow / $gcd, $element->root * $root / $gcd);
}
} else {
$elements = [new CompoundElement($unit, 1, $root)];
}
return self::getInstance($elements, [], $quantity, $symbol);
}
/**
* Build a measure with the given value and the given unit.
*
* @param float $value
* @param Unit $unit
*
* @return Measure
*/
public static function build($value, Unit $unit)
{
switch ($unit->getQuantity()) {
case Acceleration::class:
return new AccelerationMeasure($value, $unit);
case AmountOfSubstance::class:
return new AmountOfSubstanceMeasure($value, $unit);
case Angle::class:
return new AngleMeasure($value, $unit);
case Area::class:
return new AreaMeasure($value, $unit);
case CatalyticActivity::class:
return new CatalyticActivityMeasure($value, $unit);
case Constant::class:
return new ConstantMeasure($value, $unit);
case DataAmount::class:
return new DataAmountMeasure($value, $unit);
case DataRate::class:
return new DataRateMeasure($value, $unit);
case Dimensionless::class:
return new DimensionlessMeasure($value, $unit);
case Duration::class:
return new DurationMeasure($value, $unit);
case DynamicViscosity::class:
return new DynamicViscosityMeasure($value, $unit);
case ElectricCapacitance::class:
return new ElectricCapacitanceMeasure($value, $unit);
case ElectricCharge::class:
return new ElectricChargeMeasure($value, $unit);
case ElectricConductance::class:
return new ElectricConductanceMeasure($value, $unit);
case ElectricCurrent::class:
return new ElectricCurrentMeasure($value, $unit);
case ElectricInductance::class:
return new ElectricInductanceMeasure($value, $unit);
case ElectricPotential::class:
return new ElectricPotentialMeasure($value, $unit);
case ElectricResistance::class:
return new ElectricResistanceMeasure($value, $unit);
case Energy::class:
return new EnergyMeasure($value, $unit);
case Force::class:
return new ForceMeasure($value, $unit);
case Frequency::class:
return new FrequencyMeasure($value, $unit);
case Illuminance::class:
return new IlluminanceMeasure($value, $unit);
case KinematicViscosity::class:
return new KinematicViscosityMeasure($value, $unit);
case Length::class:
return new LengthMeasure($value, $unit);
case Level::class:
return new LevelMeasure($value, $unit);
case LuminousFlux::class:
return new LuminousFluxMeasure($value, $unit);
case LuminousIntensity::class:
return new LuminousIntensityMeasure($value, $unit);
case MagneticFlux::class:
return new MagneticFluxMeasure($value, $unit);
case MagneticFluxDensity::class:
return new MagneticFluxDensityMeasure($value, $unit);
case Mass::class:
return new MassMeasure($value, $unit);
case Power::class:
return new PowerMeasure($value, $unit);
case Pressure::class:
return new PressureMeasure($value, $unit);
case RadiationDoseAbsorbed::class:
return new RadiationDoseAbsorbedMeasure($value, $unit);
case RadiationDoseEffective::class:
return new RadiationDoseEffectiveMeasure($value, $unit);
case RadioactiveActivity::class:
return new RadioactiveActivityMeasure($value, $unit);
case Ratio::class:
return new RatioMeasure($value, $unit);
case SolidAngle::class:
return new SolidAngleMeasure($value, $unit);
case Temperature::class:
return new TemperatureMeasure($value, $unit);
case Velocity::class:
return new VelocityMeasure($value, $unit);
case Volume::class:
return new VolumeMeasure($value, $unit);
default:
throw new \InvalidArgumentException(sprintf('Unknown quantity "%s" for unit "%s".', get_class($unit->getQuantity()), $unit->getSymbol()));
}
}
public function root($n)
{
return new self($this->unit->root($n));
}
