de.flapdoodle.functions

Class Functions

java.lang.Object

de.flapdoodle.functions.Functions

public class Functions
extends Object

function aggregation helper

Method Summary

Methods

Modifier and Type	Method and Description
static <R,X,T> Function1<R,T>	join(Function1<R,X> outer, Function1<X,T> inner) joins two functions with matching types to a new function converts T to X to R
static <R,T1,T2,T3,A,B> Function3<R,T1,T2,T3>	join(Function2<R,A,B> outer, Function2<A,T1,T2> left, Function2<B,T2,T3> right) joins to functions with matching types to a new function converts T2 and T3 to X and T1 to R
static <R,T1,T2,X> Function2<R,T1,T2>	join(Function2<R,T1,X> outer, Function1<X,T2> inner) joins to functions with matching types to a new function converts T2 to X and T1 to R
static <R,T1,T2,T3,X> Function3<R,T1,T2,T3>	join(Function2<R,T1,X> outer, Function2<X,T2,T3> inner) joins to functions with matching types to a new function converts T2 and T3 to X and T1 to R
static <R,T1,T2> Function2<R,T1,T2>	swap(Function2<R,T2,T1> source) swap function type signature without changing behavior

Methods inherited from class java.lang.Object

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

Method Detail

join

public static <R,X,T> Function1<R,T> join(Function1<R,X> outer,
                          Function1<X,T> inner)

joins two functions with matching types to a new function converts T to X to R

Parameters:

outer - the last applied function

inner - the first applied function

Returns:

a new function

join

public static <R,T1,T2,X> Function2<R,T1,T2> join(Function2<R,T1,X> outer,
                                  Function1<X,T2> inner)

joins to functions with matching types to a new function converts T2 to X and T1 to R

Parameters:

outer - the last applied function

inner - the first applied function

Returns:

a new function

join

public static <R,T1,T2,T3,X> Function3<R,T1,T2,T3> join(Function2<R,T1,X> outer,
                                        Function2<X,T2,T3> inner)

joins to functions with matching types to a new function converts T2 and T3 to X and T1 to R

Parameters:

outer - the last applied function

inner - the first applied function

Returns:

a new function

join

public static <R,T1,T2,T3,A,B> Function3<R,T1,T2,T3> join(Function2<R,A,B> outer,
                                          Function2<A,T1,T2> left,
                                          Function2<B,T2,T3> right)

joins to functions with matching types to a new function converts T2 and T3 to X and T1 to R

Parameters:

outer - the last applied function

inner - the first applied function

Returns:

a new function

swap

public static <R,T1,T2> Function2<R,T1,T2> swap(Function2<R,T2,T1> source)

swap function type signature without changing behavior

Parameters:

source - source function

Returns:

function adapter with flipped types