Class Validation.FailProjection<E,T>

java.lang.Object
fj.data.Validation.FailProjection<E,T>
All Implemented Interfaces:
Iterable<E>
Enclosing class:
Validation<E,T>
public static final class Validation.FailProjection<E,T> extends Object implements Iterable<E>
A failing projection of a validation.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private final Validation<E,T>
    v
     

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    FailProjection(Validation<E,T> v)
     

  • Method Summary

    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,Boolean> f)
    Returns false if this is a success or returns the result of the application of the given function to the failing value.
    E
    failE(F0<String> err)
    Returns the failing value or fails with the given error message.
    E
    failE(String err)
    Returns the failing value or fails with the given error message.
    <A> Option<Validation<E,A>>
    filter(F<E,Boolean> f)
    Returns None if this is a success or if the given predicate p does not hold for the failing value, otherwise, returns a fail in Some.
    boolean
    forall(F<E,Boolean> f)
    Returns true 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.
    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 in Some if there is one, otherwise None.
    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.

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface Iterable

    forEach, spliterator

  • Field Details

  • Constructor Details

    • FailProjection

      private FailProjection(Validation<E,T> v)

  • Method Details

    • validation

      public Validation<E,T> validation()
      Returns the underlying validation.
      Returns:
      The underlying validation.

    • failE

      public E failE(F0<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.

    • failE

      public E failE(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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • filter

      public <A> Option<Validation<E,A>> filter(F<E,Boolean> f)
      Returns None if this is a success or if the given predicate p does not hold for the failing value, otherwise, returns a fail in Some.
      Parameters:
      f - The predicate function to test on this failing value.
      Returns:
      None if this is a success or if the given predicate p does not hold for the failing value, otherwise, returns a fail in Some.

    • 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.

    • forall

      public boolean forall(F<E,Boolean> f)
      Returns true 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.

    • exists

      public boolean exists(F<E,Boolean> f)
      Returns false 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.

    • 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.

    • toOption

      public Option<E> toOption()
      Returns the failing value in Some if there is one, otherwise None.
      Returns:
      The failing value in Some if there is one, otherwise None.

    • 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.

    • 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.

    • iterator

      public Iterator<E> iterator()
      Returns an iterator for this projection. This method exists to permit the use in a for-each loop.
      Specified by:
      iterator in interface Iterable<E>
      Returns:
      A iterator for this projection.