程序包 net.minecraftforge.fml

类 OptionalMod<T>

java.lang.Object

net.minecraftforge.fml.OptionalMod<T>

public final class OptionalMod<T>
extends Object

字段概要

字段

修饰符和类型	字段	说明
private static final OptionalMod<?>	EMPTY
private final String	modId
private boolean	searched
private T	value

构造器概要

构造器

限定符	构造器	说明
private	OptionalMod(boolean searched)
private	OptionalMod(String modId)

方法概要

修饰符和类型	方法	说明
private static <T> OptionalMod<T>	empty()
boolean	equals(Object obj)
OptionalMod<T>	filter(Predicate<? super T> predicate)	If a mod object is present, and the mod object matches the given predicate, return an OptionalMod describing the value, otherwise return an empty OptionalMod.
<U> Optional<U>	flatMap(Function<? super T,Optional<U>> mapper)	If a value is present, apply the provided Optional-bearing mapping function to it, return that result, otherwise return an empty Optional.
T	get()	If a mod is present in this OptionalMod, returns the value, otherwise throws NoSuchElementException.
String	getModId()
private T	getValue()
int	hashCode()
void	ifPresent(Consumer<? super T> consumer)	If a mod object is present, invoke the specified consumer with the object, otherwise do nothing.
boolean	isPresent()	Return true if there is a mod object present, otherwise false.
<U> Optional<U>	map(Function<? super T,? extends U> mapper)	If a mod object is present, apply the provided mapping function to it, and if the result is non-null, return an Optional describing the result.
static <M> OptionalMod<M>	of(String modId)
T	orElse(T other)	Return the mod object if present, otherwise return other.
T	orElseGet(Supplier<? extends T> other)	Return the mod object if present, otherwise invoke other and return the result of that invocation.
<X extends Throwable> T	orElseThrow(Supplier<? extends X> exceptionSupplier)	Return the contained mod object, if present, otherwise throw an exception to be created by the provided supplier.

从类继承的方法 java.lang.Object

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

字段详细资料

modId

private final String modId

value

private T value

searched

private boolean searched

EMPTY

private static final OptionalMod<?> EMPTY

构造器详细资料

OptionalMod

private OptionalMod(boolean searched)

OptionalMod

private OptionalMod(String modId)

方法详细资料

of

public static <M> OptionalMod<M> of(String modId)

empty

private static <T> OptionalMod<T> empty()

getValue

private T getValue()

get

public T get()

If a mod is present in this OptionalMod, returns the value, otherwise throws NoSuchElementException.

返回:

the modobject held by this OptionalMod

抛出:

NoSuchElementException - if there is no modobject present

另请参阅:

• Optional.isPresent()

getModId

public String getModId()

isPresent

public boolean isPresent()

Return true if there is a mod object present, otherwise false.

返回:

true if there is a mod object present, otherwise false

ifPresent

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

If a mod object is present, invoke the specified consumer with the object, otherwise do nothing.

参数:

consumer - block to be executed if a mod object is present

抛出:

NullPointerException - if mod object is present and consumer is null

filter

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

If a mod object is present, and the mod object matches the given predicate, return an OptionalMod describing the value, otherwise return an empty OptionalMod.

参数:

predicate - a predicate to apply to the mod object, if present

返回:

an OptionalMod describing the value of this OptionalMod if a mod object is present and the mod object matches the given predicate, otherwise an empty OptionalMod

抛出:

NullPointerException - if the predicate is null

map

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

If a mod object is present, apply the provided mapping function to it, and if the result is non-null, return an Optional describing the result. Otherwise return an empty Optional.

类型参数:

U - The type of the result of the mapping function

参数:

mapper - a mapping function to apply to the mod object, if present

返回:

an Optional describing the result of applying a mapping function to the mod object of this OptionalMod, if a mod object is present, otherwise an empty Optional

抛出:

NullPointerException - if the mapping function is null

API Note:

This method supports post-processing on optional values, without the need to explicitly check for a return status.

flatMap

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

If a value is present, apply the provided Optional-bearing mapping function to it, return that result, otherwise return an empty Optional. This method is similar to map(Function), but the provided mapper is one whose result is already an Optional, and if invoked, flatMap does not wrap it with an additional Optional.

类型参数:

U - The type parameter to the Optional returned by

参数:

mapper - a mapping function to apply to the mod object, if present the mapping function

返回:

the result of applying an Optional-bearing mapping function to the value of this Optional, if a value is present, otherwise an empty Optional

抛出:

NullPointerException - if the mapping function is null or returns a null result

orElse

public T orElse(T other)

Return the mod object if present, otherwise return other.

参数:

other - the mod object to be returned if there is no mod object present, may be null

返回:

the mod object, if present, otherwise other

orElseGet

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

Return the mod object if present, otherwise invoke other and return the result of that invocation.

参数:

other - a Supplier whose result is returned if no mod object is present

返回:

the mod object if present otherwise the result of other.get()

抛出:

NullPointerException - if mod object is not present and other is null

orElseThrow

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

Return the contained mod object, if present, otherwise throw an exception to be created by the provided supplier.

类型参数:

X - Type of the exception to be thrown

参数:

exceptionSupplier - The supplier which will return the exception to be thrown

返回:

the present mod object

抛出:

X - if there is no mod object present

NullPointerException - if no mod object is present and exceptionSupplier is null

API Note:

A method reference to the exception constructor with an empty argument list can be used as the supplier. For example, IllegalStateException::new

equals

public boolean equals(Object obj)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object