T1
- argument 1 of the functionT2
- argument 2 of the functionT3
- argument 3 of the functionT4
- argument 4 of the functionR
- return type of the function@FunctionalInterface public interface CheckedFunction4<T1,T2,T3,T4,R> extends λ<R>
λ.Memoized
Modifier and Type | Field and Description |
---|---|
static long |
serialVersionUID
The serial version uid.
|
Modifier and Type | Method and Description |
---|---|
default <V> CheckedFunction4<T1,T2,T3,T4,V> |
andThen(CheckedFunction1<? super R,? extends V> after)
Returns a composed function that first applies this CheckedFunction4 to the given argument and then applies
CheckedFunction1
after to the result. |
default CheckedFunction3<T2,T3,T4,R> |
apply(T1 t1)
Applies this function partially to one argument.
|
default CheckedFunction2<T3,T4,R> |
apply(T1 t1,
T2 t2)
Applies this function partially to two arguments.
|
default CheckedFunction1<T4,R> |
apply(T1 t1,
T2 t2,
T3 t3)
Applies this function partially to three arguments.
|
R |
apply(T1 t1,
T2 t2,
T3 t3,
T4 t4)
Applies this function to 4 arguments and returns the result.
|
default int |
arity() |
static <T1,T2,T3,T4,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,CheckedFunction1<T4,R>>>> |
curried()
Returns a curried version of this function.
|
static <T1,T2,T3,T4,R> |
lift(CheckedFunction4<? super T1,? super T2,? super T3,? super T4,? extends R> partialFunction)
Lifts the given
partialFunction into a total function that returns an Option result. |
static <T1,T2,T3,T4,R> |
liftTry(CheckedFunction4<? super T1,? super T2,? super T3,? super T4,? extends R> partialFunction)
Lifts the given
partialFunction into a total function that returns an Try result. |
default CheckedFunction4<T1,T2,T3,T4,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,R> |
of(CheckedFunction4<T1,T2,T3,T4,R> methodReference)
|
default Function4<T1,T2,T3,T4,R> |
recover(Function<? super Throwable,? extends Function4<? super T1,? super T2,? super T3,? super T4,? extends R>> recover)
Return a composed function that first applies this CheckedFunction4 to the given arguments and in case of throwable
try to get value from
recover function with same arguments and throwable information. |
default CheckedFunction4<T4,T3,T2,T1,R> |
reversed()
Returns a reversed version of this function.
|
default CheckedFunction1<Tuple4<T1,T2,T3,T4>,R> |
tupled()
Returns a tupled version of this function.
|
default Function4<T1,T2,T3,T4,R> |
unchecked()
Return unchecked function that will return this CheckedFunction4 result in correct case and throw exception
wrapped by
IllegalStateException in case of throwable. |
default Function4<T1,T2,T3,T4,R> |
unchecked(Function<? super Throwable,? extends RuntimeException> exceptionMapper)
Return unchecked function that will return this CheckedFunction4 result in correct case and throw runtime exception
wrapped by
exceptionMapper in case of throwable |
isMemoized
static final long serialVersionUID
static <T1,T2,T3,T4,R> CheckedFunction4<T1,T2,T3,T4,R> of(CheckedFunction4<T1,T2,T3,T4,R> methodReference)
CheckedFunction4
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
R
- return typeT1
- 1st argumentT2
- 2nd argumentT3
- 3rd argumentT4
- 4th argumentmethodReference
- (typically) a method reference, e.g. Type::method
CheckedFunction4
static <T1,T2,T3,T4,R> Function4<T1,T2,T3,T4,Option<R>> lift(CheckedFunction4<? super T1,? super T2,? super T3,? super T4,? extends R> partialFunction)
partialFunction
into a total function that returns an Option
result.R
- return typeT1
- 1st argumentT2
- 2nd argumentT3
- 3rd argumentT4
- 4th argumentpartialFunction
- a function that is not defined for all values of the domain (e.g. by throwing)partialFunction
and returns Some(result)
if the function is defined for the given arguments, and None
otherwise.static <T1,T2,T3,T4,R> Function4<T1,T2,T3,T4,Try<R>> liftTry(CheckedFunction4<? super T1,? super T2,? super T3,? super T4,? extends R> partialFunction)
partialFunction
into a total function that returns an Try
result.R
- return typeT1
- 1st argumentT2
- 2nd argumentT3
- 3rd argumentT4
- 4th argumentpartialFunction
- a function that is not defined for all values of the domain (e.g. by throwing)partialFunction
and returns Success(result)
if the function is defined for the given arguments, and Failure(throwable)
otherwise.R apply(T1 t1, T2 t2, T3 t3, T4 t4) throws Throwable
t1
- argument 1t2
- argument 2t3
- argument 3t4
- argument 4Throwable
- if something goes wrong applying this function to the given argumentsdefault CheckedFunction3<T2,T3,T4,R> apply(T1 t1)
t1
- argument 1default CheckedFunction2<T3,T4,R> apply(T1 t1, T2 t2)
t1
- argument 1t2
- argument 2default CheckedFunction1<T4,R> apply(T1 t1, T2 t2, T3 t3)
t1
- argument 1t2
- argument 2t3
- argument 3default int arity()
static <T1,T2,T3,T4,R> CheckedFunction4<T1,T2,T3,T4,R> constant(R value)
T1
- generic parameter type 1 of the resulting functionT2
- generic parameter type 2 of the resulting functionT3
- generic parameter type 3 of the resulting functionT4
- generic parameter type 4 of the resulting functionR
- the result typevalue
- the value to be returneddefault Function1<T1,Function1<T2,Function1<T3,CheckedFunction1<T4,R>>>> curried()
λ
default CheckedFunction1<Tuple4<T1,T2,T3,T4>,R> tupled()
λ
default CheckedFunction4<T4,T3,T2,T1,R> reversed()
λ
default CheckedFunction4<T1,T2,T3,T4,R> memoized()
λ
Please note that memoizing functions do not permit null
as single argument or return value.
default Function4<T1,T2,T3,T4,R> recover(Function<? super Throwable,? extends Function4<? super T1,? super T2,? super T3,? super T4,? extends R>> recover)
recover
function with same arguments and throwable information.recover
- the function applied in case of throwableNullPointerException
- if recover is nulldefault Function4<T1,T2,T3,T4,R> unchecked(Function<? super Throwable,? extends RuntimeException> exceptionMapper)
exceptionMapper
in case of throwableexceptionMapper
- the function that convert function Throwable
into subclass of RuntimeException
RuntimeException
issued by the given exceptionMapper
in the case of a failuredefault Function4<T1,T2,T3,T4,R> unchecked()
IllegalStateException
in case of throwable.IllegalStateException
in the case of a failuredefault <V> CheckedFunction4<T1,T2,T3,T4,V> andThen(CheckedFunction1<? super R,? extends V> after)
after
to the result.V
- return type of afterafter
- the function applied after thisNullPointerException
- if after is nullCopyright © 2016. All Rights Reserved.