Package akka.japi

Class Option<A>

  • All Implemented Interfaces:
    java.lang.Iterable<A>
    Direct Known Subclasses:
    Option.Some
    public abstract class Option<A>
extends java.lang.Object
implements java.lang.Iterable<A>
    This class represents optional values. Instances of Option are either instances of case class Some or it is case object None.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      static class  Option.Some<A>
      Class Some[A] represents existing values of type A.
      static class  Option.Some$  

    • Constructor Summary

      Constructors 
      Constructor Description
      Option()  

    • Method Summary

      All Methods Static Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method Description
      abstract scala.Option<A> asScala()  
      static <T> Option<T> fromScalaOption​(scala.Option<T> scalaOption)
      Converts a Scala Option to a Java Option
      abstract A get()  
      abstract <B> B getOrElse​(B defaultValue)
      Returns a if this is some(a) or defaultValue if this is none.
      boolean isDefined()  
      abstract boolean isEmpty()  
      java.util.Iterator<A> iterator()  
      static <A> scala.Option<A> java2ScalaOption​(Option<A> o)  
      static <A> Option<A> none()
      Option factory that creates None
      static <A> Option<A> option​(A v)
      Option factory that creates None if v is null, Some(v) otherwise.
      static <A> Option<A> scala2JavaOption​(scala.Option<A> o)  
      static <A> Option<A> some​(A v)
      Option factory that creates Some

      • Methods inherited from class java.lang.Object

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

      • Methods inherited from interface java.lang.Iterable

        forEach, spliterator

    • Constructor Detail

      • Option

        public Option()

    • Method Detail

      • some

        public static <A> Option<A> some​(A v)
        Option factory that creates Some

      • none

        public static <A> Option<A> none()
        Option factory that creates None

      • option

        public static <A> Option<A> option​(A v)
        Option factory that creates None if v is null, Some(v) otherwise.

      • fromScalaOption

        public static <T> Option<T> fromScalaOption​(scala.Option<T> scalaOption)
        Converts a Scala Option to a Java Option

      • java2ScalaOption

        public static <A> scala.Option<A> java2ScalaOption​(Option<A> o)

      • scala2JavaOption

        public static <A> Option<A> scala2JavaOption​(scala.Option<A> o)

      • get

        public abstract A get()

      • getOrElse

        public abstract <B> B getOrElse​(B defaultValue)
        Returns a if this is some(a) or defaultValue if this is none.

      • isEmpty

        public abstract boolean isEmpty()

      • isDefined

        public boolean isDefined()

      • asScala

        public abstract scala.Option<A> asScala()

      • iterator

        public java.util.Iterator<A> iterator()
        Specified by:
        iterator in interface java.lang.Iterable<A>