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

Interface RepresentativeFraction

@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 MyRepresentedFraction extends Number implements RepresentedFraction {
      ...
      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

  • 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()
      Since:
      2.2

    • 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. RepresentativeFraction is a data object - equals is defined according to getDenominator();

      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. RepresentativeFraction is a data object - hashcode is defined according to getDenominator().

      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.