Interface ThrowingFunction<T,R,E extends Throwable>
- Type Parameters:
T
- the type of the input to the functionR
- the type of the result of the functionE
- the type of exception that the function throws
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
Represents a function that accepts one argument and produces a result.
This is a functional interface
whose functional method is apply(Object)
.
- Since:
- 1.1.0
- Author:
- James Kleeh
-
Method Summary
Modifier and TypeMethodDescriptiondefault <V> ThrowingFunction<T,
V, E> Returns a composed function that first applies this function to its input, and then applies theafter
function to the result.Applies this function to the given argument.default <V> ThrowingFunction<V,
R, E> Returns a composed function that first applies thebefore
function to its input, and then applies this function to the result.static <T,
E extends Throwable>
ThrowingFunction<T,T, E> identity()
Returns a function that always returns its input argument.
-
Method Details
-
apply
Applies this function to the given argument.- Parameters:
t
- the function argument- Returns:
- the function result
- Throws:
E
- The exception to throw when something goes wrong
-
compose
Returns a composed function that first applies thebefore
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 thebefore
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
Returns a composed function that first applies this function to its input, and then applies theafter
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 theafter
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:
-
identity
Returns a function that always returns its input argument.- Type Parameters:
T
- the type of the input and output objects to the functionE
- the type of the exception the function throws- Returns:
- a function that always returns its input argument
-