com.landawn.abacus.util

Class u.Nullable<T>

java.lang.Object

com.landawn.abacus.util.u.Nullable<T>

Enclosing class:

u

public static final class u.Nullable<T>
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static <T> u.Nullable<T>	empty()
boolean	equals(java.lang.Object obj)
<E extends java.lang.Exception> u.Nullable<T>	filter(Try.Predicate<? super T,E> predicate)
<E extends java.lang.Exception> u.Optional<T>	filterIfNotNull(Try.Predicate<? super T,E> predicate)
<U,E extends java.lang.Exception> u.Nullable<U>	flatMap(Try.Function<? super T,u.Nullable<U>,E> mapper)
<U,E extends java.lang.Exception> u.Nullable<U>	flatMapIfNotNull(Try.Function<? super T,u.Nullable<U>,E> mapper)
static <T> u.Nullable<T>	from(java.util.Optional<T> optional)
static <T> u.Nullable<T>	from(u.Optional<T> optional)
T	get()
int	hashCode()
<E extends java.lang.Exception> u.Nullable<T>	ifNotNull(Try.Consumer<? super T,E> action)
<E extends java.lang.Exception,E2 extends java.lang.Exception> u.Nullable<T>	ifNotNullOrElse(Try.Consumer<? super T,E> action, Try.Runnable<E2> emptyAction)
<E extends java.lang.Exception> u.Nullable<T>	ifPresent(Try.Consumer<? super T,E> action)
<E extends java.lang.Exception,E2 extends java.lang.Exception> u.Nullable<T>	ifPresentOrElse(Try.Consumer<? super T,E> action, Try.Runnable<E2> emptyAction)
boolean	isEmpty() Deprecated. replaced by isNotPresent()
boolean	isNotNull() Returns true if the value is present and it's not null, otherwise returns false.
boolean	isNotPresent() Returns true if the value is not present, otherwise returns false.
boolean	isNull() Returns true if the value is not present, or it is present but it's null, otherwise returns false.
boolean	isPresent() Returns true if the value is present, otherwise returns false.
<U,E extends java.lang.Exception> u.Nullable<U>	map(Try.Function<? super T,? extends U,E> mapper)
<U,E extends java.lang.Exception> u.Nullable<U>	mapIfNotNull(Try.Function<? super T,? extends U,E> mapper)
<E extends java.lang.Exception> u.OptionalBoolean	mapToBoolean(Try.ToBooleanFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalBoolean	mapToBooleanIfNotNull(Try.ToBooleanFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalByte	mapToByte(Try.ToByteFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalByte	mapToByteIfNotNull(Try.ToByteFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalChar	mapToChar(Try.ToCharFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalChar	mapToCharIfNotNull(Try.ToCharFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalDouble	mapToDouble(Try.ToDoubleFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalDouble	mapToDoubleIfNotNull(Try.ToDoubleFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalFloat	mapToFloat(Try.ToFloatFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalFloat	mapToFloatIfNotNull(Try.ToFloatFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalInt	mapToInt(Try.ToIntFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalInt	mapToIntIfNotNull(Try.ToIntFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalLong	mapToLong(Try.ToLongFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalLong	mapToLongIfNotNull(Try.ToLongFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalShort	mapToShort(Try.ToShortFunction<? super T,E> mapper)
<E extends java.lang.Exception> u.OptionalShort	mapToShortIfNotNull(Try.ToShortFunction<? super T,E> mapper)
static <T> u.Nullable<T>	of(T value)
<E extends java.lang.Exception> u.Nullable<T>	or(Try.Supplier<u.Nullable<? extends T>,E> supplier)
T	orElse(T other)
<E extends java.lang.Exception> T	orElseGet(Try.Supplier<? extends T,E> other)
<E extends java.lang.Exception> T	orElseGetIfNull(Try.Supplier<? extends T,E> other)
T	orElseIfNull(T other)
T	orElseThrow()
<X extends java.lang.Throwable> T	orElseThrow(Supplier<? extends X> exceptionSupplier)
T	orElseThrowIfNull()
<X extends java.lang.Throwable> T	orElseThrowIfNull(Supplier<? extends X> exceptionSupplier)
<E extends java.lang.Exception> u.Nullable<T>	orIfNull(Try.Supplier<u.Nullable<? extends T>,E> supplier)
T	orNull()
Stream<T>	stream()
Stream<T>	streamIfNotNull()
ImmutableList<T>	toImmutableList()
ImmutableList<T>	toImmutableListIfNotNull()
ImmutableSet<T>	toImmutableSet()
ImmutableSet<T>	toImmutableSetIfNotNull()
java.util.Optional<T>	toJdkOptional()
java.util.List<T>	toList()
java.util.List<T>	toListIfNotNull()
u.Optional<T>	toOptional()
java.util.Set<T>	toSet()
java.util.Set<T>	toSetIfNotNull()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

empty

public static <T> u.Nullable<T> empty()

of

public static <T> u.Nullable<T> of(T value)

from

public static <T> u.Nullable<T> from(u.Optional<T> optional)

from

public static <T> u.Nullable<T> from(java.util.Optional<T> optional)

get

public T get()
      throws java.util.NoSuchElementException

Throws:

java.util.NoSuchElementException

isPresent

public boolean isPresent()

Returns true if the value is present, otherwise returns false.

Returns:

isNotPresent

public boolean isNotPresent()

Returns true if the value is not present, otherwise returns false.

Returns:

isEmpty

@Deprecated
public boolean isEmpty()

Deprecated. replaced by isNotPresent()

Returns true if the value is not present, otherwise returns false.

Returns:

isNull

public boolean isNull()

Returns true if the value is not present, or it is present but it's null, otherwise returns false.

Returns:

isNotNull

public boolean isNotNull()

Returns true if the value is present and it's not null, otherwise returns false.

Returns:

ifPresent

public <E extends java.lang.Exception> u.Nullable<T> ifPresent(Try.Consumer<? super T,E> action)
                                                        throws E extends java.lang.Exception

Parameters:

action -

Returns:

itself

Throws:

E

E extends java.lang.Exception

ifPresentOrElse

public <E extends java.lang.Exception,E2 extends java.lang.Exception> u.Nullable<T> ifPresentOrElse(Try.Consumer<? super T,E> action,
                                                                                                    Try.Runnable<E2> emptyAction)
                                                                                             throws E extends java.lang.Exception,
                                                                                                    E2 extends java.lang.Exception

Parameters:

action -

emptyAction -

Returns:

itself

Throws:

E

E2

E extends java.lang.Exception

ifNotNull

public <E extends java.lang.Exception> u.Nullable<T> ifNotNull(Try.Consumer<? super T,E> action)
                                                        throws E extends java.lang.Exception

Parameters:

action -

Returns:

itself

Throws:

E

E extends java.lang.Exception

ifNotNullOrElse

public <E extends java.lang.Exception,E2 extends java.lang.Exception> u.Nullable<T> ifNotNullOrElse(Try.Consumer<? super T,E> action,
                                                                                                    Try.Runnable<E2> emptyAction)
                                                                                             throws E extends java.lang.Exception,
                                                                                                    E2 extends java.lang.Exception

Parameters:

action -

emptyAction -

Returns:

itself

Throws:

E

E2

E extends java.lang.Exception

filter

public <E extends java.lang.Exception> u.Nullable<T> filter(Try.Predicate<? super T,E> predicate)
                                                     throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

filterIfNotNull

public <E extends java.lang.Exception> u.Optional<T> filterIfNotNull(Try.Predicate<? super T,E> predicate)
                                                              throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

map

public <U,E extends java.lang.Exception> u.Nullable<U> map(Try.Function<? super T,? extends U,E> mapper)
                                                    throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToBoolean

public <E extends java.lang.Exception> u.OptionalBoolean mapToBoolean(Try.ToBooleanFunction<? super T,E> mapper)
                                                               throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToChar

public <E extends java.lang.Exception> u.OptionalChar mapToChar(Try.ToCharFunction<? super T,E> mapper)
                                                         throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToByte

public <E extends java.lang.Exception> u.OptionalByte mapToByte(Try.ToByteFunction<? super T,E> mapper)
                                                         throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToShort

public <E extends java.lang.Exception> u.OptionalShort mapToShort(Try.ToShortFunction<? super T,E> mapper)
                                                           throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToInt

public <E extends java.lang.Exception> u.OptionalInt mapToInt(Try.ToIntFunction<? super T,E> mapper)
                                                       throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToLong

public <E extends java.lang.Exception> u.OptionalLong mapToLong(Try.ToLongFunction<? super T,E> mapper)
                                                         throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToFloat

public <E extends java.lang.Exception> u.OptionalFloat mapToFloat(Try.ToFloatFunction<? super T,E> mapper)
                                                           throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToDouble

public <E extends java.lang.Exception> u.OptionalDouble mapToDouble(Try.ToDoubleFunction<? super T,E> mapper)
                                                             throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapIfNotNull

public <U,E extends java.lang.Exception> u.Nullable<U> mapIfNotNull(Try.Function<? super T,? extends U,E> mapper)
                                                             throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToBooleanIfNotNull

public <E extends java.lang.Exception> u.OptionalBoolean mapToBooleanIfNotNull(Try.ToBooleanFunction<? super T,E> mapper)
                                                                        throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToCharIfNotNull

public <E extends java.lang.Exception> u.OptionalChar mapToCharIfNotNull(Try.ToCharFunction<? super T,E> mapper)
                                                                  throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToByteIfNotNull

public <E extends java.lang.Exception> u.OptionalByte mapToByteIfNotNull(Try.ToByteFunction<? super T,E> mapper)
                                                                  throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToShortIfNotNull

public <E extends java.lang.Exception> u.OptionalShort mapToShortIfNotNull(Try.ToShortFunction<? super T,E> mapper)
                                                                    throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToIntIfNotNull

public <E extends java.lang.Exception> u.OptionalInt mapToIntIfNotNull(Try.ToIntFunction<? super T,E> mapper)
                                                                throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToLongIfNotNull

public <E extends java.lang.Exception> u.OptionalLong mapToLongIfNotNull(Try.ToLongFunction<? super T,E> mapper)
                                                                  throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToFloatIfNotNull

public <E extends java.lang.Exception> u.OptionalFloat mapToFloatIfNotNull(Try.ToFloatFunction<? super T,E> mapper)
                                                                    throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

mapToDoubleIfNotNull

public <E extends java.lang.Exception> u.OptionalDouble mapToDoubleIfNotNull(Try.ToDoubleFunction<? super T,E> mapper)
                                                                      throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

flatMap

public <U,E extends java.lang.Exception> u.Nullable<U> flatMap(Try.Function<? super T,u.Nullable<U>,E> mapper)
                                                        throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

flatMapIfNotNull

public <U,E extends java.lang.Exception> u.Nullable<U> flatMapIfNotNull(Try.Function<? super T,u.Nullable<U>,E> mapper)
                                                                 throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

or

public <E extends java.lang.Exception> u.Nullable<T> or(Try.Supplier<u.Nullable<? extends T>,E> supplier)
                                                 throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

orIfNull

public <E extends java.lang.Exception> u.Nullable<T> orIfNull(Try.Supplier<u.Nullable<? extends T>,E> supplier)
                                                       throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

orNull

public T orNull()

orElse

public T orElse(T other)

orElseGet

public <E extends java.lang.Exception> T orElseGet(Try.Supplier<? extends T,E> other)
                                            throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

orElseThrow

public T orElseThrow()
              throws java.util.NoSuchElementException

Throws:

java.util.NoSuchElementException

orElseThrow

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

Throws:

X extends java.lang.Throwable

orElseIfNull

public T orElseIfNull(T other)

orElseGetIfNull

public <E extends java.lang.Exception> T orElseGetIfNull(Try.Supplier<? extends T,E> other)
                                                  throws E extends java.lang.Exception

Throws:

E extends java.lang.Exception

orElseThrowIfNull

public T orElseThrowIfNull()
                    throws java.util.NoSuchElementException

Throws:

java.util.NoSuchElementException

orElseThrowIfNull

public <X extends java.lang.Throwable> T orElseThrowIfNull(Supplier<? extends X> exceptionSupplier)
                                                    throws X extends java.lang.Throwable

Throws:

X extends java.lang.Throwable

stream

public Stream<T> stream()

streamIfNotNull

public Stream<T> streamIfNotNull()

toList

public java.util.List<T> toList()

toListIfNotNull

public java.util.List<T> toListIfNotNull()

toSet

public java.util.Set<T> toSet()

toSetIfNotNull

public java.util.Set<T> toSetIfNotNull()

toImmutableList

public ImmutableList<T> toImmutableList()

toImmutableListIfNotNull

public ImmutableList<T> toImmutableListIfNotNull()

toImmutableSet

public ImmutableSet<T> toImmutableSet()

toImmutableSetIfNotNull

public ImmutableSet<T> toImmutableSetIfNotNull()

toOptional

public u.Optional<T> toOptional()

toJdkOptional

public java.util.Optional<T> toJdkOptional()

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object