Package org.dmfs.jems2.optional

Class Absent<T>

  • All Implemented Interfaces:
    Optional<T>
    public final class Absent<T>
extends java.lang.Object
implements Optional<T>
    An Optional value that's never present.

    • Constructor Summary

      Constructors 
      Constructor Description
      Absent()  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static <T> Absent<T> absent()
      Returns an Absent value.
      boolean isPresent()
      Returns whether the optional value is present.
      T value()
      Returns the optional value.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • Absent

        public Absent()

    • Method Detail

      • absent

        public static <T> Absent<T> absent()
        Returns an Absent value.
        Type Parameters:
        T - The type of the absent value.
        Returns:
        An Absent of the given type.

      • isPresent

        public boolean isPresent()
        Description copied from interface: Optional
        Returns whether the optional value is present.
        Specified by:
        isPresent in interface Optional<T>

      • value

        public T value()
        throws java.util.NoSuchElementException
        Description copied from interface: Optional
        Returns the optional value.
        Specified by:
        value in interface Optional<T>
        Throws:
        java.util.NoSuchElementException - if the optional value is not present.