Type Parameters:

T1 - argument 1 of the function

T2 - argument 2 of the function

T3 - argument 3 of the function

T4 - argument 4 of the function

T5 - argument 5 of the function

T6 - argument 6 of the function

T7 - argument 7 of the function

T8 - argument 8 of the function

R - return type of the function

All Superinterfaces:

java.io.Serializable

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R>
extends java.io.Serializable
```
Represents a function with 8 arguments.

Field Summary

Fields
Modifier and Type Field Description

static long serialVersionUID
The serial version uid.

Method Summary

Modifier and Type	Method	Description
`default <V> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,V>`	`andThen(CheckedFunction1<? super R,? extends V> after)`	Returns a composed function that first applies this CheckedFunction8 to the given argument and then applies CheckedFunction1 `after` to the result.
`default CheckedFunction7<T2,T3,T4,T5,T6,T7,T8,R>`	`apply(T1 t1)`	Applies this function partially to one argument.
`default CheckedFunction6<T3,T4,T5,T6,T7,T8,R>`	`apply(T1 t1, T2 t2)`	Applies this function partially to two arguments.
`default CheckedFunction5<T4,T5,T6,T7,T8,R>`	`apply(T1 t1, T2 t2, T3 t3)`	Applies this function partially to three arguments.
`default CheckedFunction4<T5,T6,T7,T8,R>`	`apply(T1 t1, T2 t2, T3 t3, T4 t4)`	Applies this function partially to 4 arguments.
`default CheckedFunction3<T6,T7,T8,R>`	`apply(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5)`	Applies this function partially to 5 arguments.
`default CheckedFunction2<T7,T8,R>`	`apply(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6)`	Applies this function partially to 6 arguments.
`default CheckedFunction1<T8,R>`	`apply(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7)`	Applies this function partially to 7 arguments.
`R`	`apply(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8)`	Applies this function to 8 arguments and returns the result.
`default int`	`arity()`	Returns the number of function arguments.
`static <T1,T2,T3,T4,T5,T6,T7,T8,R> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R>`	`constant(R value)`	Returns a function that always returns the constant value that you give in parameter.
`default Function1<T1,Function1<T2,Function1<T3,Function1<T4,Function1<T5,Function1<T6,Function1<T7,CheckedFunction1<T8,R>>>>>>>>`	`curried()`	Returns a curried version of this function.
`default boolean`	`isMemoized()`	Checks if this function is memoizing (= caching) computed values.
`static <T1,T2,T3,T4,T5,T6,T7,T8,R> Function8<T1,T2,T3,T4,T5,T6,T7,T8,Option<R>>`	`lift(CheckedFunction8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R> partialFunction)`	Lifts the given `partialFunction` into a total function that returns an `Option` result.
`static <T1,T2,T3,T4,T5,T6,T7,T8,R> Function8<T1,T2,T3,T4,T5,T6,T7,T8,Try<R>>`	`liftTry(CheckedFunction8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R> partialFunction)`	Lifts the given `partialFunction` into a total function that returns an `Try` result.
`default CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R>`	`memoized()`	Returns a memoizing version of this function, which computes the return value for given arguments only one time.
`static <T1,T2,T3,T4,T5,T6,T7,T8,R> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R>`	`narrow(CheckedFunction8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R> f)`	Narrows the given `CheckedFunction8<? super T1, ? super T2, ? super T3, ? super T4, ? super T5, ? super T6, ? super T7, ? super T8, ? extends R>` to `CheckedFunction8<T1, T2, T3, T4, T5, T6, T7, T8, R>`
`static <T1,T2,T3,T4,T5,T6,T7,T8,R> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R>`	`of(CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R> methodReference)`	Creates a `CheckedFunction8` based on method reference lambda expression Examples (w.l.o.g.
`default Function8<T1,T2,T3,T4,T5,T6,T7,T8,R>`	`recover(java.util.function.Function<? super java.lang.Throwable,? extends Function8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R>> recover)`	Return a composed function that first applies this CheckedFunction8 to the given arguments and in case of throwable try to get value from `recover` function with same arguments and throwable information.
`default CheckedFunction8<T8,T7,T6,T5,T4,T3,T2,T1,R>`	`reversed()`	Returns a reversed version of this function.
`default CheckedFunction1<Tuple8<T1,T2,T3,T4,T5,T6,T7,T8>,R>`	`tupled()`	Returns a tupled version of this function.
`default Function8<T1,T2,T3,T4,T5,T6,T7,T8,R>`	`unchecked()`	Returns an unchecked function that will sneaky throw if an exceptions occurs when applying the function.

Field Detail
- serialVersionUID
```
static final long serialVersionUID
```
  The serial version uid.
  
  See Also:
  
  Constant Field Values

Method Detail

constant
```
static <T1,T2,T3,T4,T5,T6,T7,T8,R> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R> constant(R value)
```
Returns a function that always returns the constant value that you give in parameter.

Type Parameters:

T1 - generic parameter type 1 of the resulting function

T2 - generic parameter type 2 of the resulting function

T3 - generic parameter type 3 of the resulting function

T4 - generic parameter type 4 of the resulting function

T5 - generic parameter type 5 of the resulting function

T6 - generic parameter type 6 of the resulting function

T7 - generic parameter type 7 of the resulting function

T8 - generic parameter type 8 of the resulting function

R - the result type

Parameters:

value - the value to be returned

Returns:

a function always returning the given value

of

static <T1,T2,T3,T4,T5,T6,T7,T8,R> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R> of(CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R> methodReference)

Creates a CheckedFunction8 based on

Examples (w.l.o.g. referring to Function1):

// using a lambda expression
 Function1<Integer, Integer> add1 = Function1.of(i -> i + 1);

 // using a method reference (, e.g. Integer method(Integer i) { return i + 1; })
 Function1<Integer, Integer> add2 = Function1.of(this::method);

 // using a lambda reference
 Function1<Integer, Integer> add3 = Function1.of(add1::apply);

Caution: Reflection loses type information of lambda references.

// type of a lambda expression
 Type<?, ?> type1 = add1.getType(); // (Integer) -> Integer

 // type of a method reference
 Type<?, ?> type2 = add2.getType(); // (Integer) -> Integer

 // type of a lambda reference
 Type<?, ?> type3 = add3.getType(); // (Object) -> Object

Type Parameters:: R - return type; T1 - 1st argument; T2 - 2nd argument; T3 - 3rd argument; T4 - 4th argument; T5 - 5th argument; T6 - 6th argument; T7 - 7th argument; T8 - 8th argument
Parameters:: methodReference - (typically) a method reference, e.g. Type::method
Returns:: a CheckedFunction8

lift
```
static <T1,T2,T3,T4,T5,T6,T7,T8,R> Function8<T1,T2,T3,T4,T5,T6,T7,T8,Option<R>> lift(CheckedFunction8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R> partialFunction)
```
Lifts the given partialFunction into a total function that returns an Option result.

Type Parameters:

R - return type

T1 - 1st argument

T2 - 2nd argument

T3 - 3rd argument

T4 - 4th argument

T5 - 5th argument

T6 - 6th argument

T7 - 7th argument

T8 - 8th argument

Parameters:

partialFunction - a function that is not defined for all values of the domain (e.g. by throwing)

Returns:

a function that applies arguments to the given partialFunction and returns Some(result) if the function is defined for the given arguments, and None otherwise.

liftTry
```
static <T1,T2,T3,T4,T5,T6,T7,T8,R> Function8<T1,T2,T3,T4,T5,T6,T7,T8,Try<R>> liftTry(CheckedFunction8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R> partialFunction)
```
Lifts the given partialFunction into a total function that returns an Try result.

Type Parameters:

R - return type

T1 - 1st argument

T2 - 2nd argument

T3 - 3rd argument

T4 - 4th argument

T5 - 5th argument

T6 - 6th argument

T7 - 7th argument

T8 - 8th argument

Parameters:

partialFunction - a function that is not defined for all values of the domain (e.g. by throwing)

Returns:

a function that applies arguments to the given partialFunction and returns Success(result) if the function is defined for the given arguments, and Failure(throwable) otherwise.

narrow
```
static <T1,T2,T3,T4,T5,T6,T7,T8,R> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R> narrow(CheckedFunction8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R> f)
```
Narrows the given CheckedFunction8<? super T1, ? super T2, ? super T3, ? super T4, ? super T5, ? super T6, ? super T7, ? super T8, ? extends R> to CheckedFunction8<T1, T2, T3, T4, T5, T6, T7, T8, R>

Type Parameters:

R - return type

T1 - 1st argument

T2 - 2nd argument

T3 - 3rd argument

T4 - 4th argument

T5 - 5th argument

T6 - 6th argument

T7 - 7th argument

T8 - 8th argument

Parameters:

f - A CheckedFunction8

Returns:

the given f instance as narrowed type CheckedFunction8<T1, T2, T3, T4, T5, T6, T7, T8, R>

apply
```
R apply(T1 t1,
        T2 t2,
        T3 t3,
        T4 t4,
        T5 t5,
        T6 t6,
        T7 t7,
        T8 t8)
 throws java.lang.Throwable
```
Applies this function to 8 arguments and returns the result.

Parameters:

t1 - argument 1

t2 - argument 2

t3 - argument 3

t4 - argument 4

t5 - argument 5

t6 - argument 6

t7 - argument 7

t8 - argument 8

Returns:

the result of function application

Throws:

java.lang.Throwable - if something goes wrong applying this function to the given arguments

apply
```
default CheckedFunction7<T2,T3,T4,T5,T6,T7,T8,R> apply(T1 t1)
```
Applies this function partially to one argument.

Parameters:

t1 - argument 1

Returns:

a partial application of this function

apply

default CheckedFunction6<T3,T4,T5,T6,T7,T8,R> apply(T1 t1,
                                                                                        T2 t2)

Applies this function partially to two arguments.

Parameters:: t1 - argument 1; t2 - argument 2
Returns:: a partial application of this function

apply

default CheckedFunction5<T4,T5,T6,T7,T8,R> apply(T1 t1,
                                                                               T2 t2,
                                                                               T3 t3)

Applies this function partially to three arguments.

Parameters:: t1 - argument 1; t2 - argument 2; t3 - argument 3
Returns:: a partial application of this function

apply

default CheckedFunction4<T5,T6,T7,T8,R> apply(T1 t1,
                                                                      T2 t2,
                                                                      T3 t3,
                                                                      T4 t4)

Applies this function partially to 4 arguments.

Parameters:: t1 - argument 1; t2 - argument 2; t3 - argument 3; t4 - argument 4
Returns:: a partial application of this function

apply

default CheckedFunction3<T6,T7,T8,R> apply(T1 t1,
                                                             T2 t2,
                                                             T3 t3,
                                                             T4 t4,
                                                             T5 t5)

Applies this function partially to 5 arguments.

Parameters:: t1 - argument 1; t2 - argument 2; t3 - argument 3; t4 - argument 4; t5 - argument 5
Returns:: a partial application of this function

apply

default CheckedFunction2<T7,T8,R> apply(T1 t1,
                                                    T2 t2,
                                                    T3 t3,
                                                    T4 t4,
                                                    T5 t5,
                                                    T6 t6)

Applies this function partially to 6 arguments.

Parameters:: t1 - argument 1; t2 - argument 2; t3 - argument 3; t4 - argument 4; t5 - argument 5; t6 - argument 6
Returns:: a partial application of this function

apply

default CheckedFunction1<T8,R> apply(T1 t1,
                                           T2 t2,
                                           T3 t3,
                                           T4 t4,
                                           T5 t5,
                                           T6 t6,
                                           T7 t7)

Applies this function partially to 7 arguments.

Parameters:: t1 - argument 1; t2 - argument 2; t3 - argument 3; t4 - argument 4; t5 - argument 5; t6 - argument 6; t7 - argument 7
Returns:: a partial application of this function

arity
```
default int arity()
```
Returns the number of function arguments.

Returns:

an int value >= 0

See Also:

Arity

curried

default Function1<T1,Function1<T2,Function1<T3,Function1<T4,Function1<T5,Function1<T6,Function1<T7,CheckedFunction1<T8,R>>>>>>>> curried()

Returns a curried version of this function.

Returns:: a curried function equivalent to this.

tupled

default CheckedFunction1<Tuple8<T1,T2,T3,T4,T5,T6,T7,T8>,R> tupled()

Returns a tupled version of this function.

Returns:: a tupled function equivalent to this.

reversed
```
default CheckedFunction8<T8,T7,T6,T5,T4,T3,T2,T1,R> reversed()
```
Returns a reversed version of this function. This may be useful in a recursive context.

Returns:

a reversed function equivalent to this.

memoized
```
default CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R> memoized()
```
Returns a memoizing version of this function, which computes the return value for given arguments only one time. On subsequent calls given the same arguments the memoized value is returned.
Please note that memoizing functions do not permit null as single argument or return value.

Returns:

a memoizing function equivalent to this.

isMemoized
```
default boolean isMemoized()
```
Checks if this function is memoizing (= caching) computed values.

Returns:

true, if this function is memoizing, false otherwise

recover
```
default Function8<T1,T2,T3,T4,T5,T6,T7,T8,R> recover(java.util.function.Function<? super java.lang.Throwable,? extends Function8<? super T1,? super T2,? super T3,? super T4,? super T5,? super T6,? super T7,? super T8,? extends R>> recover)
```
Return a composed function that first applies this CheckedFunction8 to the given arguments and in case of throwable try to get value from recover function with same arguments and throwable information.

Parameters:

recover - the function applied in case of throwable

Returns:

a function composed of this and recover

Throws:

java.lang.NullPointerException - if recover is null

unchecked
```
default Function8<T1,T2,T3,T4,T5,T6,T7,T8,R> unchecked()
```
Returns an unchecked function that will sneaky throw if an exceptions occurs when applying the function.

Returns:

a new Function8 that throws a Throwable.

andThen
```
default <V> CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,V> andThen(CheckedFunction1<? super R,? extends V> after)
```
Returns a composed function that first applies this CheckedFunction8 to the given argument and then applies CheckedFunction1 after to the result.

Type Parameters:

V - return type of after

Parameters:

after - the function applied after this

Returns:

a function composed of this and after

Throws:

java.lang.NullPointerException - if after is null

Interface CheckedFunction8<T1,​T2,​T3,​T4,​T5,​T6,​T7,​T8,​R>

Field Summary

Method Summary

Field Detail

serialVersionUID

Method Detail

constant

of

lift

liftTry

narrow

apply

apply

apply

apply

apply

apply

apply

apply

arity

curried

tupled

reversed

memoized

isMemoized

recover

unchecked

andThen

Interface CheckedFunction8<T1,T2,T3,T4,T5,T6,T7,T8,R>