Uses of Class
com.annimon.stream.Optional

Packages that use Optional

Package	Description
com.annimon.stream

Uses of Optional in com.annimon.stream

Methods in com.annimon.stream that return Optional

Modifier and Type	Method and Description
static <T> Optional<T>	Optional.empty() Returns an empty Optional.
Optional<T>	Optional.executeIfAbsent(Runnable action) Invokes action function if value is absent.
Optional<T>	Optional.executeIfPresent(Consumer<? super T> consumer) Invokes consumer function with the value if present.
Optional<T>	Optional.filter(Predicate<? super T> predicate) Performs filtering on inner value if present.
Optional<T>	Stream.findFirst() Returns the first element wrapped by Optional class.
Optional<T>	Stream.findSingle() Returns the single element wrapped by Optional class.
<U> Optional<U>	Optional.flatMap(Function<? super T,Optional<U>> mapper) Invokes mapping function with Optional result if value is present.
Optional<T>	Exceptional.getOptional() Wraps inner value with Optional container
<U> Optional<U>	Optional.map(Function<? super T,? extends U> mapper) Invokes the given mapping function on inner value if present.
<U> Optional<U>	OptionalDouble.mapToObj(DoubleFunction<U> mapper) Invokes the given mapping function on inner value if present.
<U> Optional<U>	OptionalInt.mapToObj(IntFunction<U> mapper) Invokes mapping function on inner value if present.
<U> Optional<U>	OptionalLong.mapToObj(LongFunction<U> mapper) Invokes the given mapping function on inner value if present.
Optional<T>	Stream.max(Comparator<? super T> comparator) Finds the maximum element according to the given comparator.
Optional<T>	Stream.min(Comparator<? super T> comparator) Finds the minimum element according to the given comparator.
static <T> Optional<T>	Optional.of(T value) Returns an Optional with the specified present non-null value.
static <T> Optional<T>	Optional.ofNullable(T value) Returns an Optional with the specified value, or empty Optional if value is null.
Optional<T>	Optional.or(Supplier<Optional<T>> supplier) Returns current Optional if value is present, otherwise returns an Optional produced by supplier function.
Optional<T>	Stream.reduce(BiFunction<T,T,T> accumulator) Reduces the elements using provided associative accumulation function.
<R> Optional<R>	Optional.select(Class<R> clazz) Keeps inner value only if is present and instance of given class.

Method parameters in com.annimon.stream with type arguments of type Optional

Modifier and Type	Method and Description
<U> Optional<U>	Optional.flatMap(Function<? super T,Optional<U>> mapper) Invokes mapping function with Optional result if value is present.
Optional<T>	Optional.or(Supplier<Optional<T>> supplier) Returns current Optional if value is present, otherwise returns an Optional produced by supplier function.