com.yubico.internal.util

Class OptionalUtil

java.lang.Object

com.yubico.internal.util.OptionalUtil

public final class OptionalUtil
extends java.lang.Object

Utilities for working with Optional values.

Method Summary

Modifier and Type	Method and Description
static <T> java.util.Optional<T>	orElseOptional(java.util.Optional<T> primary, java.util.function.Supplier<java.util.Optional<T>> recover) If primary is present, return it unchanged.
static <T> java.util.stream.Stream<T>	stream(@NonNull java.util.Optional<T> o) Returns a sequential Stream with this Optional as its source.
static <T> java.util.Optional<T>	zipWith(java.util.Optional<T> a, java.util.Optional<T> b, java.util.function.BinaryOperator<T> f) If both a and b are present, return f(a, b).

Methods inherited from class java.lang.Object

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

Method Detail

orElseOptional

public static <T> java.util.Optional<T> orElseOptional(java.util.Optional<T> primary,
                                                       java.util.function.Supplier<java.util.Optional<T>> recover)

If primary is present, return it unchanged. Otherwise return the result of recover.

stream

public static <T> java.util.stream.Stream<T> stream(@NonNull
                                                    @NonNull java.util.Optional<T> o)

Returns a sequential Stream with this Optional as its source.

Parameters:

o - the Optional to interpret as a Stream

Returns:

a sequential Stream containing the value of this Optional if present, otherwise an empty Stream.

zipWith

public static <T> java.util.Optional<T> zipWith(java.util.Optional<T> a,
                                                java.util.Optional<T> b,
                                                java.util.function.BinaryOperator<T> f)

If both a and b are present, return f(a, b).

If only a is present, return a.

Otherwise, return b.