Package io.dingodb.sdk.common.utils

Class Optional<T>

java.lang.Object

io.dingodb.sdk.common.utils.Optional<T>

public class Optional<T>
extends Object

Method Summary

Modifier and Type	Method	Description
static <T> Optional<T>	empty()
Optional<T>	filter(boolean whether)
Optional<T>	filter(Predicate<? super T> predicate)
Optional<T>	filter(Supplier<Boolean> predicate)
<U> Optional<U>	flatMap(Function<? super T,Optional<T>> mapper)
T	get()
Optional<T>	ifAbsent(Runnable runnable)
Optional<T>	ifAbsentSet(Supplier<? extends T> other)
Optional<T>	ifAbsentSet(T other)
void	ifAbsentThrow(Supplier<RuntimeException> supplier)
Optional<T>	ifPresent(Runnable runnable)
Optional<T>	ifPresent(Consumer<? super T> consumer)
static <T> void	ifPresent(T value, Runnable runnable)
static <T> void	ifPresent(T value, Consumer<? super T> consumer)
boolean	isAbsent()
boolean	isPresent()
<U> Optional<U>	map(Function<? super T,U> mapper)
<U> U	mapOrGet(Function<? super T,U> mapper, Supplier<U> other)
static <T, U> U	mapOrGet(T value, Function<? super T,? extends U> mapper, Supplier<U> other)
<U> U	mapOrNull(Function<? super T,U> mapper)
static <T, U> U	mapOrNull(T value, Function<? super T,U> mapper)
static <T, U> U	mapOrThrow(T value, Function<? super T,? extends U> mapper, String message)
static <T, U, X extends Throwable> U	mapOrThrow(T value, Function<? super T,? extends U> mapper, Supplier<? extends X> exceptionSupplier)
static <T> Optional<T>	of(Optional optional)
static <T> Optional<T>	of(T value)
static <T> Optional<T>	ofNullable(T value)
static <T> Optional<T>	ofNullable(T value, Supplier<T> supplier)
static void	or(Object value, Runnable present, Runnable absent)
static <T> void	or(T value, Consumer<T> present)
static <T> void	or(T value, Consumer<T> present, Runnable absent)
boolean	orElse(boolean other)
char	orElse(char other)
double	orElse(double other)
float	orElse(float other)
int	orElse(int other)
long	orElse(long other)
short	orElse(short other)
<E extends Enum<E>> E	orElse(E other)
String	orElse(String other)
T	orElseGet(Supplier<? extends T> other)
T	orElseThrow(String message)
<X extends Throwable> T	orElseThrow(Supplier<? extends X> exceptionSupplier)
T	orNull()

Methods inherited from class java.lang.Object

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

Method Details

of

public static <T> Optional<T> of(Optional optional)

of

public static <T> Optional<T> of(T value)

ofNullable

public static <T> Optional<T> ofNullable(T value)

ofNullable

public static <T> Optional<T> ofNullable(T value,
 Supplier<T> supplier)

or

public static <T> void or(T value,
 Consumer<T> present)

or

public static <T> void or(T value,
 Consumer<T> present,
 Runnable absent)

or

public static void or(Object value,
 Runnable present,
 Runnable absent)

empty

public static <T> Optional<T> empty()

get

public T get()

isAbsent

public boolean isAbsent()

isPresent

public boolean isPresent()

ifPresent

public Optional<T> ifPresent(Consumer<? super T> consumer)

ifPresent

public Optional<T> ifPresent(Runnable runnable)

ifPresent

public static <T> void ifPresent(T value,
 Runnable runnable)

ifPresent

public static <T> void ifPresent(T value,
 Consumer<? super T> consumer)

ifAbsent

public Optional<T> ifAbsent(Runnable runnable)

ifAbsentThrow

public void ifAbsentThrow(Supplier<RuntimeException> supplier)

ifAbsentSet

public Optional<T> ifAbsentSet(T other)

ifAbsentSet

public Optional<T> ifAbsentSet(Supplier<? extends T> other)

filter

public Optional<T> filter(Predicate<? super T> predicate)

filter

public Optional<T> filter(Supplier<Boolean> predicate)

filter

public Optional<T> filter(boolean whether)

map

public <U> Optional<U> map(Function<? super T,U> mapper)

flatMap

public <U> Optional<U> flatMap(Function<? super T,Optional<T>> mapper)

orElse

public <E extends Enum<E>> E orElse(E other)

orElse

public short orElse(short other)

orElse

public int orElse(int other)

orElse

public long orElse(long other)

orElse

public float orElse(float other)

orElse

public double orElse(double other)

orElse

public boolean orElse(boolean other)

orElse

public char orElse(char other)

orElse

public String orElse(String other)

mapOrNull

public <U> U mapOrNull(Function<? super T,U> mapper)

mapOrNull

public static <T,
U> U mapOrNull(T value,
 Function<? super T,U> mapper)

mapOrGet

public <U> U mapOrGet(Function<? super T,U> mapper,
 Supplier<U> other)

mapOrGet

public static <T,
U> U mapOrGet(T value,
 Function<? super T,? extends U> mapper,
 Supplier<U> other)

mapOrThrow

public static <T,
U> U mapOrThrow(T value,
 Function<? super T,? extends U> mapper,
 String message)

mapOrThrow

public static <T,
U,
X extends Throwable> U mapOrThrow(T value,
 Function<? super T,? extends U> mapper,
 Supplier<? extends X> exceptionSupplier)
                                              throws X

Throws:

X extends Throwable

orNull

public T orNull()

orElseGet

public T orElseGet(Supplier<? extends T> other)

orElseThrow

public T orElseThrow(String message)

orElseThrow

public <X extends Throwable> T orElseThrow(Supplier<? extends X> exceptionSupplier)
                                    throws X

Throws:

X extends Throwable