Package net.shibboleth.utilities.java.support.logic

Class PredicateDrivenFunction<T,U>

java.lang.Object

net.shibboleth.utilities.java.support.logic.PredicateDrivenFunction<T,U>

Type Parameters:

T - type of input accepted by this function

U - type of output produced by this function

All Implemented Interfaces:

Function<T,U>

@ThreadSafe
public class PredicateDrivenFunction<T,U>
extends Object
implements Function<T,U>

A Function that runs a Predicate and then runs one of two other possible functions based on the result.

If either function is null, the result will be null if that function were needed.

Since:

8.2.0

Field Summary

Fields

Modifier and Type	Field	Description
private Function<? super T,U>	falseFunction	Function to apply if predicate is false.
private Predicate<? super T>	predicate	A predicate to apply.
private Function<? super T,U>	trueFunction	Function to apply if predicate is true.

Constructor Summary

Constructors

Constructor	Description
PredicateDrivenFunction(Predicate<? super T> condition, Function<? super T,U> whenTrue, Function<? super T,U> whenFalse)	Constructor.

Method Summary

Modifier and Type	Method	Description
U	apply(T input)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Function

andThen, compose

Field Detail

predicate

@Nonnull
private final Predicate<? super T> predicate

A predicate to apply.

trueFunction

@Nullable
private final Function<? super T,U> trueFunction

Function to apply if predicate is true.

falseFunction

@Nullable
private final Function<? super T,U> falseFunction

Function to apply if predicate is false.

Constructor Detail

PredicateDrivenFunction

public PredicateDrivenFunction(@Nonnull @ParameterName(name="condition")
                               Predicate<? super T> condition,
                               @Nullable @ParameterName(name="whenTrue")
                               Function<? super T,U> whenTrue,
                               @Nullable @ParameterName(name="whenFalse")
                               Function<? super T,U> whenFalse)

Constructor.

Parameters:

condition - predicate to apply

whenTrue - function to apply if predicate evaluates to true

whenFalse - function to apply if predicate evaluates to false

Method Detail

apply

public U apply(@Nullable
               T input)

Specified by:

apply in interface Function<T,U>