F (playframework)

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play.libs
Class F

java.lang.Object
  play.libs.F

public class F extends java.lang.Object
extends java.lang.Object

Defines a set of functional programming style helpers.

Nested Class Summary
`static interface`	`F.Callback<A>` A Callback with a single argument.
`static interface`	`F.Callback0` A Callback with no arguments.
`static interface`	`F.Callback2<A,B>` A Callback with 2 arguments.
`static interface`	`F.Callback3<A,B,C>` A Callback with 3 arguments.
`static class`	`F.Either<A,B>` Represents a value of one of two possible types (a disjoint union)
`static interface`	`F.Function<A,R>` A Function with a single argument.
`static interface`	`F.Function0<R>` A Function with no arguments.
`static interface`	`F.Function2<A,B,R>` A Function with 2 arguments.
`static interface`	`F.Function3<A,B,C,R>` A Function with 3 arguments.
`static class`	`F.None<T>` Represents non-existent values.
`static class`	`F.Option<T>` Represents optional values.
`static class`	`F.Promise<A>` A promise to produce a result of type `A`.
`static class`	`F.Some<T>` Represents existing values of type `T`.
`static class`	`F.Tuple<A,B>` A pair - a tuple of the types `A` and `B`.
`static class`	`F.Tuple3<A,B,C>` A tuple of A,B,C
`static class`	`F.Tuple4<A,B,C,D>` A tuple of A,B,C,D
`static class`	`F.Tuple5<A,B,C,D,E>` A tuple of A,B,C,D,E

Constructor Summary
`F()`

Method Summary

static F.None None()
Constructs a None value.

static



<A> F.Some<A>

Some(A value)
Construct a Some value.

static



<A,B> F.Tuple<A,B>

Tuple(A a,
      B b)

Constructs a tuple of A,B

static



<A,B,C> F.Tuple3<A,B,C>

Tuple3(A a,
       B b,
       C c)

Constructs a tuple of A,B,C

static



<A,B,C,D> F.Tuple4<A,B,C,D>

Tuple4(A a,
       B b,
       C c,
       D d)

Constructs a tuple of A,B,C,D

static



<A,B,C,D,E> 


F.Tuple5<A,B,C,D,E>

Tuple5(A a,
       B b,
       C c,
       D d,
       E e)

Constructs a tuple of A,B,C,D,E

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

F

public F()

Method Detail

Some

public static <A> F.Some<A> Some(A value)

Construct a Some value.

Parameters:: value - The value
Returns:: Some value.

None

public static F.None None()

Constructs a None value.

Returns:: None.

Tuple

public static <A,B> F.Tuple<A,B> Tuple(A a,
                                       B b)