Interface UnitConverter

public interface UnitConverter
A converter of numeric values between different units.

Instances of this class are usually obtained through the Unit.getConverterTo(Unit) method.

Since:
1.0
Version:
1.0, August 8, 2016
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    UnitConverter
    concatenate(UnitConverter converter)
    Concatenates this converter with another converter.
    double
    convert(double value)
    Converts a double value.
    Number
    convert(Number value)
    Converts a Number value.
    List<? extends UnitConverter>
    getConversionSteps()
    Returns the steps of fundamental converters making up this converter or this if the converter is a fundamental converter.
    UnitConverter
    inverse()
    Returns the inverse of this converter.
    boolean
    isIdentity()
    Indicates if this converter is an identity converter.
    boolean
    isLinear()
    Indicates if this converter is linear.

  • Method Details

    • isIdentity

      boolean isIdentity()
      Indicates if this converter is an identity converter. The identity converter returns its input argument (convert(x) == x).
      Returns:
      true if this converter is an identity converter.

    • isLinear

      boolean isLinear()
      Indicates if this converter is linear. A converter is linear if:
      • convert(u + v) == convert(u) + convert(v)
      • convert(r * u) == r * convert(u)

      For linear converters the following property always hold:

      y1 = c1.convert(x1); y2 = c2.convert(x2); assert y1*y2 == c1.concatenate(c2).convert(x1*x2);
      Returns:
      true if this converter is linear; false otherwise.

    • inverse

      UnitConverter inverse()
      Returns the inverse of this converter. If x is a valid value, then x == inverse().convert(convert(x)) to within the accuracy of computer arithmetic.
      Returns:
      the inverse of this converter.

    • convert

      Number convert(Number value)
      Converts a Number value.
      Parameters:
      value - the Number value to convert.
      Returns:
      the Number value after conversion.

    • convert

      double convert(double value)
      Converts a double value.
      Parameters:
      value - the numeric value to convert.
      Returns:
      the double value after conversion.

    • concatenate

      UnitConverter concatenate(UnitConverter converter)
      Concatenates this converter with another converter. The resulting converter is equivalent to first converting by the specified converter (right converter), and then converting by this converter (left converter).
      Parameters:
      converter - the other converter to concatenate with this converter.
      Returns:
      the concatenation of this converter with the other converter.

    • getConversionSteps

      List<? extends UnitConverter> getConversionSteps()

      Returns the steps of fundamental converters making up this converter or this if the converter is a fundamental converter.

      For example, converter1.getConversionSteps() returns converter1 while converter1.concatenate(converter2).getConversionSteps() returns converter1, converter2.

      Returns:
      the list of fundamental converters which concatenated make up this converter.