Package com.atlassian.confluence.core

Class None<T>

java.lang.Object
com.atlassian.confluence.core.None<T>
Type Parameters:
T - the type Maybe is wrapping
All Implemented Interfaces:
io.atlassian.fugue.Effect.Applicant<T>, io.atlassian.fugue.Maybe<T>, Iterable<T>
public abstract class None<T> extends Object implements io.atlassian.fugue.Maybe<T>
Helps constructing the left, erroneous case of a Maybe.
Since:
7.0.1

  • Method Details

    • becauseOfNoResult

      public static <T> io.atlassian.fugue.Maybe<T> becauseOfNoResult(io.atlassian.fugue.Maybe<?> maybe)
      Will cast the given Maybe to one with the expected parametrisation.

      This has to be Maybe.isEmpty() since it is expected to escape on a Maybe.get() call.

      Parameters:
      maybe - to be casted to the target type
      Returns:
      the casted Maybe adhering to the taget type

    • becauseOf

      public static <T> io.atlassian.fugue.Maybe<T> becauseOf(String message, Object... args)
      Constructs a Maybe which will escape with the given message on a Maybe.get() call.
      Parameters:
      message - the message used for the escape, may be formatted for application of String.format(String, Object...)
      args - the arguments used for formatting the message, may be null
      Returns:
      the Maybe escaping on realization

    • becauseOfException

      public static <T> io.atlassian.fugue.Maybe<T> becauseOfException(Exception exception)
      Constructs a Maybe which will escape with the given exception on a Maybe.get() call.
      Parameters:
      exception - the exception to be thrown, will be nested in a RuntimeException if it is checked

    • getOrError

      public T getOrError(Supplier<String> msg)
      Specified by:
      getOrError in interface io.atlassian.fugue.Maybe<T>

    • getOr

      public T getOr(Supplier<? extends T> supplier)
      Specified by:
      getOr in interface io.atlassian.fugue.Maybe<T>

    • getOrElse

      public T getOrElse(Supplier<? extends T> supplier)
      Specified by:
      getOrElse in interface io.atlassian.fugue.Maybe<T>

    • getOrThrow

      public <X extends Throwable> T getOrThrow(Supplier<X> xSupplier) throws X
      Specified by:
      getOrThrow in interface io.atlassian.fugue.Maybe<T>
      Throws:
      X extends Throwable

    • getOrElse

      public <B extends T> T getOrElse(B other)
      Specified by:
      getOrElse in interface io.atlassian.fugue.Maybe<T>

    • foreach

      public void foreach(io.atlassian.fugue.Effect<? super T> effect)
      Specified by:
      foreach in interface io.atlassian.fugue.Effect.Applicant<T>

    • getOrNull

      public T getOrNull()
      Specified by:
      getOrNull in interface io.atlassian.fugue.Maybe<T>

    • exists

      public boolean exists(Predicate<? super T> p)
      Specified by:
      exists in interface io.atlassian.fugue.Maybe<T>

    • iterator

      public @NonNull Iterator<T> iterator()
      Specified by:
      iterator in interface Iterable<T>
      Specified by:
      iterator in interface io.atlassian.fugue.Maybe<T>

    • forall

      public boolean forall(Predicate<? super T> p)
      Specified by:
      forall in interface io.atlassian.fugue.Maybe<T>

    • isEmpty

      public boolean isEmpty()
      Specified by:
      isEmpty in interface io.atlassian.fugue.Maybe<T>

    • isDefined

      public boolean isDefined()
      Specified by:
      isDefined in interface io.atlassian.fugue.Maybe<T>

    • contains

      public boolean contains(T elem)
      Specified by:
      contains in interface io.atlassian.fugue.Maybe<T>