javax.measure.unit

Interface Dimension.Model

Enclosing class:

Dimension

public static interface Dimension.Model

This interface represents the mapping between base units and dimensions. Custom models may allow conversions not possible using the standard model. For example:

 public static void main(String[] args) {
     Dimension.Model relativistic = new Dimension.Model() { 
         RationalConverter meterToSecond = new RationalConverter(1, 299792458); // 1/c
         
         public Dimension getDimension(BaseUnit unit) { 
             if (unit.equals(SI.METER)) return Dimension.TIME; 
             else return Dimension.Model.STANDARD.getDimension(unit); 
         }
 
         public UnitConverter getTransform(BaseUnit unit) { 
             if (unit.equals(SI.METER)) return meterToSecond; 
             else return Dimension.Model.STANDARD.getTransform(unit); 
         }
     };
     
     Dimension.setModel(relativistic);
 
     // Converts 1.0 GeV (energy) to kg (mass).
     System.out.println(Unit.valueOf("GeV").getConverterTo(KILOGRAM).convert(1.0)); 
 }
 
 > 1.7826617302520883E-27
 

Field Summary

Fields

Modifier and Type	Field and Description
static Dimension.Model	STANDARD Holds the standard model (default).

Method Summary

Methods

Modifier and Type	Method and Description
Dimension	getDimension(BaseUnit<?> unit) Returns the dimension of the specified base unit (a dimension particular to the base unit if the base unit is not recognized).
UnitConverter	getTransform(BaseUnit<?> unit) Returns the normalization transform of the specified base unit (IDENTITY if the base unit is not recognized).

Field Detail

STANDARD

static final Dimension.Model STANDARD

Holds the standard model (default).

Method Detail

getDimension

Dimension getDimension(BaseUnit<?> unit)

Returns the dimension of the specified base unit (a dimension particular to the base unit if the base unit is not recognized).

Parameters:

unit - the base unit for which the dimension is returned.

Returns:

the dimension of the specified unit.

getTransform

UnitConverter getTransform(BaseUnit<?> unit)

Returns the normalization transform of the specified base unit (IDENTITY if the base unit is not recognized).

Parameters:

unit - the base unit for which the transform is returned.

Returns:

the normalization transform.