org.apache.drill.common.util.function

Interface CheckedFunction<T,R,E extends Throwable>

Type Parameters:

T - function argument type

R - function result type

E - exception type

All Superinterfaces:

Function<T,R>

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 CheckedFunction<T,R,E extends Throwable>
extends Function<T,R>

Extension of Function that allows to throw checked exception.

Method Summary

Modifier and Type	Method and Description
default R	apply(T t) Overrides Function.apply(Object) method to allow calling functions that throw checked exceptions.
R	applyAndThrow(T t) Applies function to the given argument.

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Method Detail

apply

default R apply(T t)

Overrides Function.apply(Object) method to allow calling functions that throw checked exceptions. Is useful when used in methods that accept Function. For example: Map.computeIfAbsent(Object, Function).

Specified by:

apply in interface Function<T,R>

Parameters:

t - the function argument

Returns:

the function result

applyAndThrow

R applyAndThrow(T t)
         throws E extends Throwable

Applies function to the given argument.

Parameters:

t - the function argument

Returns:

the function result

Throws:

E - exception in case of errors

E extends Throwable