Package fj.data
Class Validation.FailProjection<E,T>
- java.lang.Object
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- fj.data.Validation.FailProjection<E,T>
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- All Implemented Interfaces:
java.lang.Iterable<E>
- Enclosing class:
- Validation<E,T>
public static final class Validation.FailProjection<E,T> extends java.lang.Object implements java.lang.Iterable<E>
A failing projection of a validation.
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Field Summary
Fields Modifier and Type Field Description private Validation<E,T>
v
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Constructor Summary
Constructors Modifier Constructor Description private
FailProjection(Validation<E,T> v)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description <A> Validation<A,T>
apply(Validation<F<E,A>,T> v)
Function application on the failing value.<A> Validation<A,T>
bind(F<E,Validation<A,T>> f)
Binds the given function across this validation's failing value if it has one.boolean
exists(F<E,java.lang.Boolean> f)
Returnsfalse
if this is a success or returns the result of the application of the given function to the failing value.E
failE(F0<java.lang.String> err)
Returns the failing value or fails with the given error message.E
failE(java.lang.String err)
Returns the failing value or fails with the given error message.<A> Option<Validation<E,A>>
filter(F<E,java.lang.Boolean> f)
ReturnsNone
if this is a success or if the given predicatep
does not hold for the failing value, otherwise, returns a fail inSome
.boolean
forall(F<E,java.lang.Boolean> f)
Returnstrue
if this is a success or returns the result of the application of the given function to the failing value.Unit
foreach(F<E,Unit> f)
Executes a side-effect on the failing value if there is one.void
foreachDoEffect(Effect1<E> f)
Executes a side-effect on the failing value if there is one.java.util.Iterator<E>
iterator()
Returns an iterator for this projection.<A> Validation<A,T>
map(F<E,A> f)
Maps the given function across the failing side of this validation.E
on(F<T,E> f)
The failing value or the application of the given function to the success value.E
orFail(E e)
Returns the failing value or the given value.E
orFail(F0<E> e)
Returns the failing value or the given value.<A> Validation<A,T>
sequence(Validation<A,T> v)
Performs a bind across the validation, but ignores the element value in the function.Array<E>
toArray()
Returns a single element array if this is a failing value, otherwise an empty list.List<E>
toList()
Returns a single element list if this is a failing value, otherwise an empty list.Option<E>
toOption()
Returns the failing value inSome
if there is one, otherwiseNone
.Stream<E>
toStream()
Returns a single element stream if this is a failing value, otherwise an empty list.Validation<E,T>
validation()
Returns the underlying validation.
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Field Detail
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v
private final Validation<E,T> v
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Constructor Detail
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FailProjection
private FailProjection(Validation<E,T> v)
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Method Detail
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validation
public Validation<E,T> validation()
Returns the underlying validation.- Returns:
- The underlying validation.
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failE
public E failE(F0<java.lang.String> err)
Returns the failing value or fails with the given error message.- Parameters:
err
- The error message to fail with.- Returns:
- The failing value.
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failE
public E failE(java.lang.String err)
Returns the failing value or fails with the given error message.- Parameters:
err
- The error message to fail with.- Returns:
- The failing value.
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orFail
public E orFail(F0<E> e)
Returns the failing value or the given value.- Parameters:
e
- The value to return if this is success.- Returns:
- The failing value or the given value.
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orFail
public E orFail(E e)
Returns the failing value or the given value.- Parameters:
e
- The value to return if this is success.- Returns:
- The failing value or the given value.
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on
public E on(F<T,E> f)
The failing value or the application of the given function to the success value.- Parameters:
f
- The function to execute on the success value.- Returns:
- The failing value or the application of the given function to the success value.
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foreach
public Unit foreach(F<E,Unit> f)
Executes a side-effect on the failing value if there is one.- Parameters:
f
- The side-effect to execute.- Returns:
- The unit value.
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foreachDoEffect
public void foreachDoEffect(Effect1<E> f)
Executes a side-effect on the failing value if there is one.- Parameters:
f
- The side-effect to execute.
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map
public <A> Validation<A,T> map(F<E,A> f)
Maps the given function across the failing side of this validation.- Parameters:
f
- The function to map.- Returns:
- A new validation with the function mapped.
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bind
public <A> Validation<A,T> bind(F<E,Validation<A,T>> f)
Binds the given function across this validation's failing value if it has one.- Parameters:
f
- The function to bind across this validation.- Returns:
- A new validation value after binding.
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sequence
public <A> Validation<A,T> sequence(Validation<A,T> v)
Performs a bind across the validation, but ignores the element value in the function.- Parameters:
v
- The validation value to apply in the final join.- Returns:
- A new validation value after the final join.
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filter
public <A> Option<Validation<E,A>> filter(F<E,java.lang.Boolean> f)
ReturnsNone
if this is a success or if the given predicatep
does not hold for the failing value, otherwise, returns a fail inSome
.- Parameters:
f
- The predicate function to test on this failing value.- Returns:
None
if this is a success or if the given predicatep
does not hold for the failing value, otherwise, returns a fail inSome
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apply
public <A> Validation<A,T> apply(Validation<F<E,A>,T> v)
Function application on the failing value.- Parameters:
v
- The validation of the function to apply on the failing value.- Returns:
- The result of function application in validation.
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forall
public boolean forall(F<E,java.lang.Boolean> f)
Returnstrue
if this is a success or returns the result of the application of the given function to the failing value.- Parameters:
f
- The predicate function to test on this failing value.- Returns:
true
if this is a success or returns the result of the application of the given function to the failing value.
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exists
public boolean exists(F<E,java.lang.Boolean> f)
Returnsfalse
if this is a success or returns the result of the application of the given function to the failing value.- Parameters:
f
- The predicate function to test on this failing value.- Returns:
false
if this is a success or returns the result of the application of the given function to the failing value.
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toList
public List<E> toList()
Returns a single element list if this is a failing value, otherwise an empty list.- Returns:
- A single element list if this is a failing value, otherwise an empty list.
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toOption
public Option<E> toOption()
Returns the failing value inSome
if there is one, otherwiseNone
.- Returns:
- The failing value in
Some
if there is one, otherwiseNone
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toArray
public Array<E> toArray()
Returns a single element array if this is a failing value, otherwise an empty list.- Returns:
- A single element array if this is a failing value, otherwise an empty list.
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toStream
public Stream<E> toStream()
Returns a single element stream if this is a failing value, otherwise an empty list.- Returns:
- A single element stream if this is a failing value, otherwise an empty list.
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