Interface Callable<T>

Type Parameters:
T - the result type
All Superinterfaces:
Callable<T>
public interface Callable<T> extends Callable<T>
An enhanced callable.
Author:
Paul Ferraro

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final Callable<?>
    NULL
    A caller that always returns null

  • Method Summary

    Modifier and Type
    Method
    Description
    default <R> Callable<R>
    andThen(Function<T,R> mapper)
    Returns a callable whose result is mapped by the specified function.
    static <T> Callable<T>
    empty()
    Returns a callable that returns null.
    static <T> Callable<T>
    exceptional(Supplier<? extends Exception> exceptionProvider)
    Returns a callable that throws the provided exception.
    static <T> Callable<T>
    get(Supplier<T> supplier)
    Returns a callable that delegates to the specified supplier.
    static <T> Callable<T>
    of(T value)
    Returns a callable that returns the specified value.
    static <T> Callable<T>
    run(Runnable runner)
    Returns a callable that runs the specified runner and returns null.

    Methods inherited from interface Callable

    call

  • Field Details

    • NULL

      static final Callable<?> NULL
      A caller that always returns null

  • Method Details

    • andThen

      default <R> Callable<R> andThen(Function<T,R> mapper)
      Returns a callable whose result is mapped by the specified function.
      Type Parameters:
      R - the mapped result type
      Parameters:
      mapper - a mapping function
      Returns:
      a callable whose result is mapped by the specified function.

    • empty

      static <T> Callable<T> empty()
      Returns a callable that returns null.
      Type Parameters:
      T - the result type
      Returns:
      a callable that returns null.

    • run

      static <T> Callable<T> run(Runnable runner)
      Returns a callable that runs the specified runner and returns null.
      Type Parameters:
      T - the result type
      Parameters:
      runner - a runner
      Returns:
      a callable that runs the specified runner and returns null.

    • get

      static <T> Callable<T> get(Supplier<T> supplier)
      Returns a callable that delegates to the specified supplier.
      Type Parameters:
      T - the result type
      Parameters:
      supplier - a supplier
      Returns:
      the result of the specified supplier.

    • of

      static <T> Callable<T> of(T value)
      Returns a callable that returns the specified value.
      Type Parameters:
      T - the result type
      Parameters:
      value - the result value
      Returns:
      a callable that returns the specified value.

    • exceptional

      static <T> Callable<T> exceptional(Supplier<? extends Exception> exceptionProvider)
      Returns a callable that throws the provided exception.
      Type Parameters:
      T - the result type
      Parameters:
      exceptionProvider - a provider of an exception
      Returns:
      a callable that throws the provided exception.