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
    Version:
    3.0

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      double doubleValue()
      Returns the scale value in a form usable for computation.
      boolean equals​(java.lang.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 Detail

      • doubleValue

        double doubleValue()
        Returns the scale value in a form usable for computation.
        Returns:
        1.0 / (double) getDenominator()
        Since:
        2.2

      • equals

        boolean equals​(java.lang.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 java.lang.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 java.lang.Object
        Returns:
        A hash code value for this representative fraction.