Uses of Interface
javaslang.control.Validation

Packages that use Validation

Package	Description
javaslang	The javaslang package contains core types like λ, Lazy and Tuple.
javaslang.control	Control structures like the disjoint union type Either, the optional value type Option and Try for exception handling.

Uses of Validation in javaslang

Methods in javaslang that return Validation

Modifier and Type	Method and Description
default <U> Validation<T,U>	Value.toInvalid(Supplier<? extends U> valueSupplier) Converts this to a Validation.
default <U> Validation<T,U>	Value.toInvalid(U value) Converts this to a Validation.
default <E> Validation<E,T>	Value.toValid(E error) Converts this to a Validation.
default <E> Validation<E,T>	Value.toValid(Supplier<? extends E> errorSupplier) Converts this to a Validation.
default <L> Validation<L,T>	Value.toValidation(L invalid) Converts this to an Validation.
default <L> Validation<L,T>	Value.toValidation(Supplier<? extends L> invalidSupplier) Converts this to an Validation.

Uses of Validation in javaslang.control

Classes in javaslang.control that implement Validation

Modifier and Type	Class and Description
static class	Validation.Invalid<E,T> An invalid Validation
static class	Validation.Valid<E,T> A valid Validation

Methods in javaslang.control that return Validation

Modifier and Type	Method and Description
<R> Validation<List<E>,R>	Validation.Builder.ap(Function2<T1,T2,R> f)
<R> Validation<List<E>,R>	Validation.Builder3.ap(Function3<T1,T2,T3,R> f)
<R> Validation<List<E>,R>	Validation.Builder4.ap(Function4<T1,T2,T3,T4,R> f)
<R> Validation<List<E>,R>	Validation.Builder5.ap(Function5<T1,T2,T3,T4,T5,R> f)
<R> Validation<List<E>,R>	Validation.Builder6.ap(Function6<T1,T2,T3,T4,T5,T6,R> f)
<R> Validation<List<E>,R>	Validation.Builder7.ap(Function7<T1,T2,T3,T4,T5,T6,T7,R> f)
<R> Validation<List<E>,R>	Validation.Builder8.ap(Function8<T1,T2,T3,T4,T5,T6,T7,T8,R> f)
default <U> Validation<List<E>,U>	Validation.ap(Validation<List<E>,? extends Function<? super T,? extends U>> validation)
default <E2,T2> Validation<E2,T2>	Validation.bimap(Function<? super E,? extends E2> errorMapper, Function<? super T,? extends T2> valueMapper) Whereas map only performs a mapping on a valid Validation, and mapError performs a mapping on an invalid Validation, bimap allows you to provide mapping actions for both, and will give you the result based on what type of Validation this is.
default <U> Validation<E,U>	Validation.flatMap(Function<? super T,? extends Validation<E,? extends U>> mapper)
static <E,T> Validation<E,T>	Validation.fromEither(Either<E,T> either) Creates a Validation of an Either.
static <E,T> Validation<E,T>	Validation.invalid(E error) Creates an Validation.Invalid that contains the given error.
default <U> Validation<U,T>	Validation.leftMap(Function<? super E,? extends U> f) Deprecated. replaced by mapError(Function)
default <U> Validation<E,U>	Validation.map(Function<? super T,? extends U> f)
default <U> Validation<U,T>	Validation.mapError(Function<? super E,? extends U> f) Applies a function f to the error of this Validation if this is an Invalid.
static <E,T> Validation<E,T>	Validation.narrow(Validation<? extends E,? extends T> validation) Narrows a widened Validation<? extends E, ? extends T> to Validation<E, T> by performing a type-safe cast.
default Validation<E,T>	Validation.orElse(Supplier<Validation<? extends E,? extends T>> supplier) Returns this Validation if it is valid, otherwise return the result of evaluating supplier.
default Validation<E,T>	Validation.orElse(Validation<? extends E,? extends T> other) Returns this Validation if it is valid, otherwise return the alternative.
default Validation<E,T>	Validation.peek(Consumer<? super T> action)
static <E,T> Validation<List<E>,Seq<T>>	Validation.sequence(Iterable<? extends Validation<List<E>,T>> values) Reduces many Validation instances into a single Validation by transforming an Iterable<Validation<? extends T>> into a Validation<Seq<T>>.
default Validation<T,E>	Validation.swap() Flip the valid/invalid values for this Validation.
static <E,T> Validation<E,T>	Validation.valid(T value) Creates a Validation.Valid that contains the given value.

Methods in javaslang.control that return types with arguments of type Validation

Modifier and Type	Method and Description
default Option<Validation<E,T>>	Validation.filter(Predicate<? super T> predicate)

Methods in javaslang.control with parameters of type Validation

Modifier and Type	Method and Description
default <U> Validation<List<E>,U>	Validation.ap(Validation<List<E>,? extends Function<? super T,? extends U>> validation)
static <E,T1,T2> Validation.Builder<E,T1,T2>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2) Combines two Validations into a Validation.Builder.
static <E,T1,T2> Validation.Builder<E,T1,T2>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2) Combines two Validations into a Validation.Builder.
static <E,T1,T2,T3> Validation.Builder3<E,T1,T2,T3>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3) Combines three Validations into a Validation.Builder3.
static <E,T1,T2,T3> Validation.Builder3<E,T1,T2,T3>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3) Combines three Validations into a Validation.Builder3.
static <E,T1,T2,T3> Validation.Builder3<E,T1,T2,T3>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3) Combines three Validations into a Validation.Builder3.
static <E,T1,T2,T3,T4> Validation.Builder4<E,T1,T2,T3,T4>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4) Combines four Validations into a Validation.Builder4.
static <E,T1,T2,T3,T4> Validation.Builder4<E,T1,T2,T3,T4>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4) Combines four Validations into a Validation.Builder4.
static <E,T1,T2,T3,T4> Validation.Builder4<E,T1,T2,T3,T4>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4) Combines four Validations into a Validation.Builder4.
static <E,T1,T2,T3,T4> Validation.Builder4<E,T1,T2,T3,T4>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4) Combines four Validations into a Validation.Builder4.
static <E,T1,T2,T3,T4,T5> Validation.Builder5<E,T1,T2,T3,T4,T5>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5) Combines five Validations into a Validation.Builder5.
static <E,T1,T2,T3,T4,T5> Validation.Builder5<E,T1,T2,T3,T4,T5>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5) Combines five Validations into a Validation.Builder5.
static <E,T1,T2,T3,T4,T5> Validation.Builder5<E,T1,T2,T3,T4,T5>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5) Combines five Validations into a Validation.Builder5.
static <E,T1,T2,T3,T4,T5> Validation.Builder5<E,T1,T2,T3,T4,T5>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5) Combines five Validations into a Validation.Builder5.
static <E,T1,T2,T3,T4,T5> Validation.Builder5<E,T1,T2,T3,T4,T5>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5) Combines five Validations into a Validation.Builder5.
static <E,T1,T2,T3,T4,T5,T6> Validation.Builder6<E,T1,T2,T3,T4,T5,T6>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6) Combines six Validations into a Validation.Builder6.
static <E,T1,T2,T3,T4,T5,T6> Validation.Builder6<E,T1,T2,T3,T4,T5,T6>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6) Combines six Validations into a Validation.Builder6.
static <E,T1,T2,T3,T4,T5,T6> Validation.Builder6<E,T1,T2,T3,T4,T5,T6>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6) Combines six Validations into a Validation.Builder6.
static <E,T1,T2,T3,T4,T5,T6> Validation.Builder6<E,T1,T2,T3,T4,T5,T6>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6) Combines six Validations into a Validation.Builder6.
static <E,T1,T2,T3,T4,T5,T6> Validation.Builder6<E,T1,T2,T3,T4,T5,T6>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6) Combines six Validations into a Validation.Builder6.
static <E,T1,T2,T3,T4,T5,T6> Validation.Builder6<E,T1,T2,T3,T4,T5,T6>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6) Combines six Validations into a Validation.Builder6.
static <E,T1,T2,T3,T4,T5,T6,T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7) Combines seven Validations into a Validation.Builder7.
static <E,T1,T2,T3,T4,T5,T6,T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7) Combines seven Validations into a Validation.Builder7.
static <E,T1,T2,T3,T4,T5,T6,T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7) Combines seven Validations into a Validation.Builder7.
static <E,T1,T2,T3,T4,T5,T6,T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7) Combines seven Validations into a Validation.Builder7.
static <E,T1,T2,T3,T4,T5,T6,T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7) Combines seven Validations into a Validation.Builder7.
static <E,T1,T2,T3,T4,T5,T6,T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7) Combines seven Validations into a Validation.Builder7.
static <E,T1,T2,T3,T4,T5,T6,T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7) Combines seven Validations into a Validation.Builder7.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
static <E,T1,T2,T3,T4,T5,T6,T7,T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.combine(Validation<E,T1> validation1, Validation<E,T2> validation2, Validation<E,T3> validation3, Validation<E,T4> validation4, Validation<E,T5> validation5, Validation<E,T6> validation6, Validation<E,T7> validation7, Validation<E,T8> validation8) Combines eight Validations into a Validation.Builder8.
<T3> Validation.Builder3<E,T1,T2,T3>	Validation.Builder.combine(Validation<E,T3> v3)
<T4> Validation.Builder4<E,T1,T2,T3,T4>	Validation.Builder3.combine(Validation<E,T4> v4)
<T5> Validation.Builder5<E,T1,T2,T3,T4,T5>	Validation.Builder4.combine(Validation<E,T5> v5)
<T6> Validation.Builder6<E,T1,T2,T3,T4,T5,T6>	Validation.Builder5.combine(Validation<E,T6> v6)
<T7> Validation.Builder7<E,T1,T2,T3,T4,T5,T6,T7>	Validation.Builder6.combine(Validation<E,T7> v7)
<T8> Validation.Builder8<E,T1,T2,T3,T4,T5,T6,T7,T8>	Validation.Builder7.combine(Validation<E,T8> v8)
default <U> Validation.Builder<E,T,U>	Validation.combine(Validation<E,U> validation) Combines two Validations to form a Validation.Builder, which can then be used to perform further combines, or apply a function to it in order to transform the Validation.Builder into a Validation.
static <E,T> Validation<E,T>	Validation.narrow(Validation<? extends E,? extends T> validation) Narrows a widened Validation<? extends E, ? extends T> to Validation<E, T> by performing a type-safe cast.
default Validation<E,T>	Validation.orElse(Validation<? extends E,? extends T> other) Returns this Validation if it is valid, otherwise return the alternative.

Method parameters in javaslang.control with type arguments of type Validation

Modifier and Type	Method and Description
default <U> Validation<E,U>	Validation.flatMap(Function<? super T,? extends Validation<E,? extends U>> mapper)
default Validation<E,T>	Validation.orElse(Supplier<Validation<? extends E,? extends T>> supplier) Returns this Validation if it is valid, otherwise return the result of evaluating supplier.
static <E,T> Validation<List<E>,Seq<T>>	Validation.sequence(Iterable<? extends Validation<List<E>,T>> values) Reduces many Validation instances into a single Validation by transforming an Iterable<Validation<? extends T>> into a Validation<Seq<T>>.