Vavr 0.10.6 · io.vavr.CheckedFunction1 · APIdia, the JavaDoc alternative

Modifier and Type	Field and Description
public static final long	serialVersionUID The serial version uid.

Method Summary

Modifier and Type	Method and Description
public default < return type of after V> CheckedFunction1<T1, V>	Returns: a function composed of this and after andThen(CheckedFunction1<? super R, ? extends V> the function applied after this after) Returns a composed function that first applies this CheckedFunction1 to the given argument and then applies CheckedFunction1 `after` to the result.
public R	Returns: the result of function application apply(T1 argument 1 t1) Applies this function to one argument and returns the result.
public default int	Returns: an int value >= 0 arity() Returns the number of function arguments.
public default < argument type of before V> CheckedFunction1<V, R>	Returns: a function composed of before and this compose(CheckedFunction1<? super V, ? extends T1> the function applied before this before) Returns a composed function that first applies the CheckedFunction1 `before` the given argument and then applies this CheckedFunction1 to the result.
public static < generic parameter type 1 of the resulting function T1, the result type R> CheckedFunction1<T1, R>	Returns: a function always returning the given value constant(R the value to be returned value) Returns a function that always returns the constant value that you give in parameter.
public default CheckedFunction1<T1, R>	Returns: a curried function equivalent to this. curried() Returns a curried version of this function.
public static < argument type (and return type) of the identity function T> CheckedFunction1<T, T>	Returns: the identity CheckedFunction1 identity() Returns the identity CheckedFunction1, i.e. the function that returns its input.
public default boolean	Returns: true, if this function is memoizing, false otherwise isMemoized() Checks if this function is memoizing (= caching) computed values.
public static < 1st argument T1, return type R> Function1<T1, Option<R>>	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. lift(CheckedFunction1<? super T1, ? extends R> a function that is not defined for all values of the domain (e.g. by throwing) partialFunction) Lifts the given `partialFunction` into a total function that returns an `Option` result.
public static < 1st argument T1, return type R> Function1<T1, Try<R>>	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. liftTry(CheckedFunction1<? super T1, ? extends R> a function that is not defined for all values of the domain (e.g. by throwing) partialFunction) Lifts the given `partialFunction` into a total function that returns an `Try` result.
public default CheckedFunction1<T1, R>	Returns: a memoizing function equivalent to this. memoized() Returns a memoizing version of this function, which computes the return value for given arguments only one time.
public static < 1st argument T1, return type R> CheckedFunction1<T1, R>	Returns: the given `f` instance as narrowed type `CheckedFunction1<T1, R>` narrow(CheckedFunction1<? super T1, ? extends R> A `CheckedFunction1` f) Narrows the given `CheckedFunction1<?`
public static < 1st argument T1, return type R> CheckedFunction1<T1, R>	Returns: a `CheckedFunction1` of(CheckedFunction1<T1, R> (typically) a method reference, e.g. `Type::method` methodReference) Creates a `CheckedFunction1` based on method reference lambda expression
public default Function1<T1, R>	Returns: a function composed of this and recover recover(Function<? super Throwable, ? extends Function<? super T1, ? extends R>> the function applied in case of throwable recover) Return a composed function that first applies this CheckedFunction1 to the given arguments and in case of throwable try to get value from `recover` function with same arguments and throwable information.
public default CheckedFunction1<T1, R>	Returns: a reversed function equivalent to this. reversed() Returns a reversed version of this function.
public default CheckedFunction1<Tuple1<T1>, R>	Returns: a tupled function equivalent to this. tupled() Returns a tupled version of this function.
public default Function1<T1, R>	Returns: a new Function1 that throws a `Throwable`. unchecked() Returns an unchecked function that will sneaky throw if an exceptions occurs when applying the function.

serialVersionUID	back to summary
public static final long serialVersionUID The serial version uid.

Method Detail

andThen back to summary

andThen	back to summary
public default <V> CheckedFunction1<T1, V> andThen(CheckedFunction1<? super R, ? extends V> after) Returns a composed function that first applies this CheckedFunction1 to the given argument and then applies CheckedFunction1 `after` to the result. Parameters <V> return type of after after:CheckedFunction1<? super R, ? extends V> the function applied after this Returns:CheckedFunction1<T1, V> a function composed of this and after Exceptions NullPointerException: if after is null

public default <V> CheckedFunction1<T1, V> andThen(CheckedFunction1<? super R, ? extends V> after)

Returns a composed function that first applies this CheckedFunction1 to the given argument and then applies CheckedFunction1 after to the result.

Parameters

<V>: return type of after
after:CheckedFunction1<? super R, ? extends V>: the function applied after this

Returns:CheckedFunction1<T1, V>

a function composed of this and after

Exceptions

NullPointerException:: if after is null

apply	back to summary
public R apply(T1 t1) throws Throwable Applies this function to one argument and returns the result. Parameters t1:T1 argument 1 Returns:R the result of function application Exceptions Throwable: if something goes wrong applying this function to the given arguments

apply

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public R apply(T1 t1) throws Throwable

Applies this function to one argument and returns the result.

Parameters

t1:T1: argument 1

Returns:R

the result of function application

Exceptions

Throwable:: if something goes wrong applying this function to the given arguments

arity	back to summary
public default int arity() Returns the number of function arguments. Returns:int an int value >= 0 See Also Arity

arity

back to summary

public default int arity()

Returns the number of function arguments.

Returns:int: an int value >= 0
See Also: Arity

compose back to summary

compose	back to summary
public default <V> CheckedFunction1<V, R> compose(CheckedFunction1<? super V, ? extends T1> before) Returns a composed function that first applies the CheckedFunction1 `before` the given argument and then applies this CheckedFunction1 to the result. Parameters <V> argument type of before before:CheckedFunction1<? super V, ? extends T1> the function applied before this Returns:CheckedFunction1<V, R> a function composed of before and this Exceptions NullPointerException: if before is null

public default <V> CheckedFunction1<V, R> compose(CheckedFunction1<? super V, ? extends T1> before)

Returns a composed function that first applies the CheckedFunction1 before the given argument and then applies this CheckedFunction1 to the result.

Parameters

<V>: argument type of before
before:CheckedFunction1<? super V, ? extends T1>: the function applied before this

Returns:CheckedFunction1<V, R>

a function composed of before and this

Exceptions

NullPointerException:: if before is null

constant	back to summary
public static <T1, R> CheckedFunction1<T1, R> constant(R value) Returns a function that always returns the constant value that you give in parameter. Parameters <T1> generic parameter type 1 of the resulting function <R> the result type value:R the value to be returned Returns:CheckedFunction1<T1, R> a function always returning the given value

constant

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public static <T1, R> CheckedFunction1<T1, R> constant(R value)

Returns a function that always returns the constant value that you give in parameter.

Parameters

<T1>: generic parameter type 1 of the resulting function
<R>: the result type
value:R: the value to be returned

Returns:CheckedFunction1<T1, R>

a function always returning the given value

curried	back to summary
public default CheckedFunction1<T1, R> curried() Returns a curried version of this function. Returns:CheckedFunction1<T1, R> a curried function equivalent to this.

curried

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public default CheckedFunction1<T1, R> curried()

Returns a curried version of this function.

Returns:CheckedFunction1<T1, R>: a curried function equivalent to this.

identity	back to summary
public static <T> CheckedFunction1<T, T> identity() Returns the identity CheckedFunction1, i.e. the function that returns its input. Parameters <T> argument type (and return type) of the identity function Returns:CheckedFunction1<T, T> the identity CheckedFunction1

identity

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public static <T> CheckedFunction1<T, T> identity()

Returns the identity CheckedFunction1, i.e. the function that returns its input.

Parameters

<T>: argument type (and return type) of the identity function

Returns:CheckedFunction1<T, T>

the identity CheckedFunction1

isMemoized	back to summary
public default boolean isMemoized() Checks if this function is memoizing (= caching) computed values. Returns:boolean true, if this function is memoizing, false otherwise

isMemoized

back to summary

public default boolean isMemoized()

Checks if this function is memoizing (= caching) computed values.

Returns:boolean: true, if this function is memoizing, false otherwise

lift back to summary

lift	back to summary
public static <T1, R> Function1<T1, Option<R>> lift(CheckedFunction1<? super T1, ? extends R> partialFunction) Lifts the given `partialFunction` into a total function that returns an `Option` result. Parameters <T1> 1st argument <R> return type partialFunction:CheckedFunction1<? super T1, ? extends R> a function that is not defined for all values of the domain (e.g. by throwing) Returns:Function1<T1, Option<R>> 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. Annotations @SuppressWarnings:RedundantTypeArguments

public static <T1, R> Function1<T1, Option<R>> lift(CheckedFunction1<? super T1, ? extends R> partialFunction)

Lifts the given partialFunction into a total function that returns an Option result.

Parameters

<T1>: 1st argument
<R>: return type
partialFunction:CheckedFunction1<? super T1, ? extends R>: a function that is not defined for all values of the domain (e.g. by throwing)

Returns:Function1<T1, Option<R>>

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.

Annotations

@SuppressWarnings:RedundantTypeArguments

liftTry back to summary

liftTry	back to summary
public static <T1, R> Function1<T1, Try<R>> liftTry(CheckedFunction1<? super T1, ? extends R> partialFunction) Lifts the given `partialFunction` into a total function that returns an `Try` result. Parameters <T1> 1st argument <R> return type partialFunction:CheckedFunction1<? super T1, ? extends R> a function that is not defined for all values of the domain (e.g. by throwing) Returns:Function1<T1, Try<R>> 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.

public static <T1, R> Function1<T1, Try<R>> liftTry(CheckedFunction1<? super T1, ? extends R> partialFunction)

Lifts the given partialFunction into a total function that returns an Try result.

Parameters

<T1>: 1st argument
<R>: return type
partialFunction:CheckedFunction1<? super T1, ? extends R>: a function that is not defined for all values of the domain (e.g. by throwing)

Returns:Function1<T1, Try<R>>

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.

memoized back to summary

memoized	back to summary
public default CheckedFunction1<T1, 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:CheckedFunction1<T1, R> a memoizing function equivalent to this.

public default CheckedFunction1<T1, 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:CheckedFunction1<T1, R>: a memoizing function equivalent to this.

narrow back to summary

narrow	back to summary
public static <T1, R> CheckedFunction1<T1, R> narrow(CheckedFunction1<? super T1, ? extends R> f) Narrows the given `CheckedFunction1<? super T1, ? extends R>` to `CheckedFunction1<T1, R>` Parameters <T1> 1st argument <R> return type f:CheckedFunction1<? super T1, ? extends R> A `CheckedFunction1` Returns:CheckedFunction1<T1, R> the given `f` instance as narrowed type `CheckedFunction1<T1, R>` Annotations @SuppressWarnings:unchecked

public static <T1, R> CheckedFunction1<T1, R> narrow(CheckedFunction1<? super T1, ? extends R> f)

Narrows the given CheckedFunction1<? super T1, ? extends R> to CheckedFunction1<T1, R>

Parameters

<T1>: 1st argument
<R>: return type
f:CheckedFunction1<? super T1, ? extends R>: A CheckedFunction1

Returns:CheckedFunction1<T1, R>

the given f instance as narrowed type CheckedFunction1<T1, R>

Annotations

@SuppressWarnings:unchecked

of back to summary

of	back to summary
public static <T1, R> CheckedFunction1<T1, R> of(CheckedFunction1<T1, R> methodReference) Creates a `CheckedFunction1` based on method reference lambda expression 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` Parameters <T1> 1st argument <R> return type methodReference:CheckedFunction1<T1, R> (typically) a method reference, e.g. `Type::method` Returns:CheckedFunction1<T1, R> a `CheckedFunction1`

public static <T1, R> CheckedFunction1<T1, R> of(CheckedFunction1<T1, R> methodReference)

Creates a CheckedFunction1 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

Parameters

<T1>: 1st argument
<R>: return type
methodReference:CheckedFunction1<T1, R>: (typically) a method reference, e.g. Type::method

Returns:CheckedFunction1<T1, R>

a CheckedFunction1

recover back to summary

recover	back to summary
public default Function1<T1, R> recover(Function<? super Throwable, ? extends Function<? super T1, ? extends R>> recover) Return a composed function that first applies this CheckedFunction1 to the given arguments and in case of throwable try to get value from `recover` function with same arguments and throwable information. Parameters recover:Function<? super Throwable, ? extends Function<? super T1, ? extends R>> the function applied in case of throwable Returns:Function1<T1, R> a function composed of this and recover Exceptions NullPointerException: if recover is null

public default Function1<T1, R> recover(Function<? super Throwable, ? extends Function<? super T1, ? extends R>> recover)

Return a composed function that first applies this CheckedFunction1 to the given arguments and in case of throwable try to get value from recover function with same arguments and throwable information.

Parameters

recover:Function<? super Throwable, ? extends Function<? super T1, ? extends R>>: the function applied in case of throwable

Returns:Function1<T1, R>

a function composed of this and recover

Exceptions

NullPointerException:: if recover is null

reversed	back to summary
public default CheckedFunction1<T1, R> reversed() Returns a reversed version of this function. This may be useful in a recursive context. Returns:CheckedFunction1<T1, R> a reversed function equivalent to this.

reversed

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public default CheckedFunction1<T1, R> reversed()

Returns a reversed version of this function. This may be useful in a recursive context.

Returns:CheckedFunction1<T1, R>: a reversed function equivalent to this.

tupled	back to summary
public default CheckedFunction1<Tuple1<T1>, R> tupled() Returns a tupled version of this function. Returns:CheckedFunction1<Tuple1<T1>, R> a tupled function equivalent to this.

tupled

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public default CheckedFunction1<Tuple1<T1>, R> tupled()

Returns a tupled version of this function.

Returns:CheckedFunction1<Tuple1<T1>, R>: a tupled function equivalent to this.

unchecked back to summary

unchecked	back to summary
public default Function1<T1, R> unchecked() Returns an unchecked function that will sneaky throw if an exceptions occurs when applying the function. Returns:Function1<T1, R> a new Function1 that throws a `Throwable`.

public default Function1<T1, R> unchecked()

Returns an unchecked function that will sneaky throw if an exceptions occurs when applying the function.

Returns:Function1<T1, R>: a new Function1 that throws a Throwable.

public Interface CheckedFunction1<T1, R>

Field Summary

Method Summary

Field Detail

Method Detail