Package com.helger.commons.functional

Interface IThrowingFunction<T,R,EXTYPE extends Throwable>

Type Parameters:
T - the type of the input to the function
R - the type of the result of the function
EXTYPE - exception type
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 IThrowingFunction<T,R,EXTYPE extends Throwable>
Represents a function that accepts one argument and produces a result and may throw an Exception.

This is a functional interface whose functional method is apply(Object).

Since:
8.3.1

  • Method Summary

    Modifier and Type
    Method
    Description
    default <V> IThrowingFunction<T,V,EXTYPE>
    andThen(IThrowingFunction<? super R,? extends V,? extends EXTYPE> after)
    Returns a composed function that first applies this function to its input, and then applies the after function to the result.
    R
    apply(T t)
    Applies this function to the given argument.
    default <V> IThrowingFunction<V,R,EXTYPE>
    compose(IThrowingFunction<? super V,? extends T,? extends EXTYPE> before)
    Returns a composed function that first applies the before function to its input, and then applies this function to the result.

  • Method Details

    • apply

      R apply(T t) throws EXTYPE
      Applies this function to the given argument.
      Parameters:
      t - the function argument
      Returns:
      the function result
      Throws:
      EXTYPE - In case it is needed

    • compose

      @Nonnull default <V> IThrowingFunction<V,R,EXTYPE> compose(@Nonnull IThrowingFunction<? super V,? extends T,? extends EXTYPE> before)
      Returns a composed function that first applies the before function to its input, and then applies this function to the result. If evaluation of either function throws an exception, it is relayed to the caller of the composed function.
      Type Parameters:
      V - the type of input to the before function, and to the composed function
      Parameters:
      before - the function to apply before this function is applied
      Returns:
      a composed function that first applies the before function and then applies this function
      Throws:
      NullPointerException - if before is null
      See Also:

    • andThen

      @Nonnull default <V> IThrowingFunction<T,V,EXTYPE> andThen(@Nonnull IThrowingFunction<? super R,? extends V,? extends EXTYPE> after)
      Returns a composed function that first applies this function to its input, and then applies the after function to the result. If evaluation of either function throws an exception, it is relayed to the caller of the composed function.
      Type Parameters:
      V - the type of output of the after function, and of the composed function
      Parameters:
      after - the function to apply after this function is applied
      Returns:
      a composed function that first applies this function and then applies the after function
      Throws:
      NullPointerException - if after is null
      See Also: