Package com.pivovarit.function

Interface ThrowingFunction<T,R,E extends Exception>

Type Parameters:
T - the type of the input to the function
R - the type of the result of the function
E - the type of the thrown checked exception
All Known Subinterfaces:
ThrowingUnaryOperator<T,E>
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface ThrowingFunction<T,R,E extends Exception>
Represents a function that accepts one argument and returns a value; Function might throw a checked exception instance.
Author:
Grzegorz Piwowarek

  • Method Details

    • apply

      R apply(T arg) throws E
      Throws:
      E

    • lifted

      static <T, R> Function<T,Optional<R>> lifted(ThrowingFunction<T,R,?> f)
      Returns a new Function instance which wraps a result of the given function in an Optional, returning an empty Optional in case of a checked exception
      Type Parameters:
      T - type of the argument to the function
      R - type of the result of the function
      Parameters:
      f - operation throwing checked exception
      Returns:
      a Function that returns the result of the given function as an Optional instance.

    • unchecked

      static <T, R> Function<T,R> unchecked(ThrowingFunction<T,R,?> f)
      Returns a new Function instance which rethrows the checked exception using the Sneaky Throws pattern
      Type Parameters:
      T - type of the argument to the function
      R - type of the result of the function
      Parameters:
      f - operation throwing checked exception
      Returns:
      Function instance that rethrows the checked exception using the Sneaky Throws pattern

    • sneaky

      static <T1, R> Function<T1,R> sneaky(ThrowingFunction<? super T1,? extends R,?> function)
      Returns a new Function instance which rethrows the checked exception using the Sneaky Throws pattern
      Type Parameters:
      T1 - type of the argument to the function
      R - type of the result of the function
      Parameters:
      function - operation throwing checked exception
      Returns:
      Function instance that rethrows the checked exception using the Sneaky Throws pattern

    • compose

      default <V> ThrowingFunction<V,R,E> compose(ThrowingFunction<? super V,? extends T,? extends E> before)

    • andThen

      default <V> ThrowingFunction<T,V,E> andThen(ThrowingFunction<? super R,? extends V,? extends E> after)

    • lift

      default Function<T,Optional<R>> lift()

    • uncheck

      default Function<T,R> uncheck()