Package com.yubico.internal.util

Class OptionalUtil

java.lang.Object

com.yubico.internal.util.OptionalUtil

public final class OptionalUtil
extends Object

Utilities for working with Optional values.

Method Summary

Modifier and Type	Method	Description
static <T> Optional<T>	orElseOptional(Optional<T> primary, Supplier<Optional<T>> recover)	If primary is present, return it unchanged.
static <T> Optional<T>	orOptional(Optional<T> primary, Optional<T> secondary)	If primary is present, return it unchanged.
static <T> Stream<T>	stream(@NonNull Optional<T> o)	Returns a sequential Stream with this Optional as its source.
static <T> Optional<T>	zipWith(Optional<T> a, Optional<T> b, 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 Details

orOptional

public static <T> Optional<T> orOptional(Optional<T> primary,
 Optional<T> secondary)

If primary is present, return it unchanged. Otherwise return secondary.

orElseOptional

public static <T> Optional<T> orElseOptional(Optional<T> primary,
 Supplier<Optional<T>> recover)

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

stream

public static <T> Stream<T> stream(@NonNull
 @NonNull 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> Optional<T> zipWith(Optional<T> a,
 Optional<T> b,
 BinaryOperator<T> f)

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

If only a is present, return a.

Otherwise, return b.