Module org.opengis.geoapi
Package org.opengis.metadata.identification

Interface RepresentativeFraction

@Classifier(DATATYPE) @UML(identifier="MD_RepresentativeFraction", specification=ISO_19115) public interface RepresentativeFraction
A scale defined as the inverse of a denominator. This is derived from ISO 19103 Scale where denominator = 1 / scale.

Implementations are encouraged to extend Number in a manner equivalent to:

class MyFraction extends Number implements RepresentativeFraction {
    public double doubleValue() {
        return 1.0 / (double) denominator;
    }
    public float floatValue() {
        return 1.0f / (float) denominator;
    }
    public long longValue() {
        return 1 / denominator;       // Result is zero except for denominator = [0,1].
    }
}
Since:
2.1
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    double
    doubleValue()
    Returns the scale value in a form usable for computation.
    boolean
    equals(Object other)
    Compares this representative fraction with the specified object for equality.
    long
    getDenominator()
    The number below the line in a vulgar fraction.
    int
    hashCode()
    Returns a hash value for this representative fraction.

  • Method Details

    • doubleValue

      double doubleValue()
      Returns the scale value in a form usable for computation.
      Returns:
      1.0 / (double) getDenominator()

    • getDenominator

      @UML(identifier="denominator", obligation=MANDATORY, specification=ISO_19115) long getDenominator()
      The number below the line in a vulgar fraction.
      Returns:
      the denominator.

    • equals

      boolean equals(Object other)
      Compares this representative fraction with the specified object for equality. Implementations should match the following: 
      public boolean equals(Object object) {
    if (object instanceof RepresentativeFraction) {
        final RepresentativeFraction that = (RepresentativeFraction) object;
        return getDenominator() == that.getDenominator();
    }
    return false;
}
      Overrides:
      equals in class Object
      Parameters:
      other - the object to compare with.
      Returns:
      true if other is a RepresentedFraction with the same denominator value.

    • hashCode

      int hashCode()
      Returns a hash value for this representative fraction. Implementations should match the following: 
      public int hashCode() {
    return (int) getDenominator();
}
      Overrides:
      hashCode in class Object
      Returns:
      a hash code value for this representative fraction.