Module powerunit.exceptions

Package ch.powerunit.extensions.exceptions

Interface LongFunctionWithException<R,E extends Exception>

Type Parameters:

R - the type of the result of the function

E - the type of the potential exception of the function

All Superinterfaces:

ExceptionHandlerSupport<R,E>, ObjectReturnExceptionHandlerSupport<LongFunction<R>,LongFunction<Optional<R>>,LongFunction<CompletionStage<R>>,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 LongFunctionWithException<R,E extends Exception>
extends ObjectReturnExceptionHandlerSupport<LongFunction<R>,LongFunction<Optional<R>>,LongFunction<CompletionStage<R>>,R>

Represents a function that accepts a long-valued argument, may throw exception and produces a result. This is the long-consuming primitive specialization for FunctionWithException.

General contract

• R apply(long value) throws E - The functional method.
• uncheck - Return a LongFunction<R>
• lift - Return a LongFunction<Optional<R>>
• ignore - Return a LongFunction<R>

See Also:

LongFunction

Method Summary

Modifier and Type	Method	Description
R	apply(long value)	Applies this function to the given argument.
static <R,E extends Exception> LongFunctionWithException<R,E>	failing(Supplier<E> exceptionBuilder)	Returns a function that always throw exception.
default LongFunction<R>	ignore()	Converts this LongFunctionWithException to a lifted LongFunction returning null in case of exception.
static <R,E extends Exception> LongFunction<R>	ignored(LongFunctionWithException<R,E> function)	Converts a LongFunctionWithException to a lifted LongFunction returning null in case of exception.
default LongFunction<Optional<R>>	lift()	Converts this LongFunctionWithException to a lifted LongFunction using Optional as return value.
static <R,E extends Exception> LongFunction<Optional<R>>	lifted(LongFunctionWithException<R,E> function)	Converts a LongFunctionWithException to a lifted Function using Optional as return value.
default LongFunction<CompletionStage<R>>	stage()	Convert this LongFunctionWithException to a lifted LongFunction returning CompletionStage as return value.
static <R,E extends Exception> LongFunction<CompletionStage<R>>	staged(LongFunctionWithException<R,E> function)	Convert this LongFunctionWithException to a lifted LongFunction return CompletionStage as return value.
default LongFunction<R>	uncheck()	Converts this LongFunctionWithException to a LongFunction that wraps exception to RuntimeException.
static <R,E extends Exception> LongFunction<R>	unchecked(LongFunctionWithException<R,E> function)	Converts a FunctionWithException to a LongFunction that wraps to RuntimeException.
static <R,E extends Exception> LongFunction<R>	unchecked(LongFunctionWithException<R,E> function, Function<Exception,RuntimeException> exceptionMapper)	Converts a LongFunctionWithException to a LongFunction that wraps exception to RuntimeException by using the provided mapping function.

Methods inherited from interface ch.powerunit.extensions.exceptions.ExceptionHandlerSupport

exceptionMapper, exceptionMapperFor

Methods inherited from interface ch.powerunit.extensions.exceptions.ObjectReturnExceptionHandlerSupport

notThrowingHandler, staged, throwingHandler, unchecked

Method Detail

apply

R apply(long value)
 throws E extends Exception

Applies this function to the given argument.

Parameters:

value - the function argument

Returns:

the function result

Throws:

E - any exception

E extends Exception

See Also:

LongFunction.apply(long)

uncheck

default LongFunction<R> uncheck()

Converts this LongFunctionWithException to a LongFunction that wraps exception to RuntimeException.

Specified by:

uncheck in interface ExceptionHandlerSupport<R,E extends Exception>

Specified by:

uncheck in interface ObjectReturnExceptionHandlerSupport<LongFunction<R>,LongFunction<Optional<R>>,LongFunction<CompletionStage<R>>,R>

Returns:

the unchecked function

See Also:

unchecked(LongFunctionWithException), unchecked(LongFunctionWithException, Function)

lift

default LongFunction<Optional<R>> lift()

Converts this LongFunctionWithException to a lifted LongFunction using Optional as return value.

Specified by:

lift in interface ExceptionHandlerSupport<R,E extends Exception>

Specified by:

lift in interface ObjectReturnExceptionHandlerSupport<LongFunction<R>,LongFunction<Optional<R>>,LongFunction<CompletionStage<R>>,R>

Returns:

the lifted function

See Also:

lifted(LongFunctionWithException)

ignore

default LongFunction<R> ignore()

Converts this LongFunctionWithException to a lifted LongFunction returning null in case of exception.

Specified by:

ignore in interface ExceptionHandlerSupport<R,E extends Exception>

Specified by:

ignore in interface ObjectReturnExceptionHandlerSupport<LongFunction<R>,LongFunction<Optional<R>>,LongFunction<CompletionStage<R>>,R>

Returns:

the function that ignore error

See Also:

ignored(LongFunctionWithException)

stage

default LongFunction<CompletionStage<R>> stage()

Convert this LongFunctionWithException to a lifted LongFunction returning CompletionStage as return value.

Specified by:

stage in interface ObjectReturnExceptionHandlerSupport<LongFunction<R>,LongFunction<Optional<R>>,LongFunction<CompletionStage<R>>,R>

Returns:

the lifted function

See Also:

staged(LongFunctionWithException)

failing

static <R,E extends Exception> LongFunctionWithException<R,E> failing(Supplier<E> exceptionBuilder)

Returns a function that always throw exception.

Type Parameters:

R - the type of the result of the function

E - the type of the exception

Parameters:

exceptionBuilder - the supplier to create the exception

Returns:

a function that always throw exception

unchecked

static <R,E extends Exception> LongFunction<R> unchecked(LongFunctionWithException<R,E> function)

Converts a FunctionWithException to a LongFunction that wraps to RuntimeException.

Type Parameters:

R - the type of the output object to the function

E - the type of the potential exception

Parameters:

function - to be unchecked

Returns:

the unchecked exception

Throws:

NullPointerException - if function is null

See Also:

uncheck(), unchecked(LongFunctionWithException, Function)

unchecked

static <R,E extends Exception> LongFunction<R> unchecked(LongFunctionWithException<R,E> function,
                                                         Function<Exception,RuntimeException> exceptionMapper)

Converts a LongFunctionWithException to a LongFunction that wraps exception to RuntimeException by using the provided mapping function.

Type Parameters:

R - the type of the result of the function

E - the type of the potential exception

Parameters:

function - the be unchecked

exceptionMapper - a function to convert the exception to the runtime exception.

Returns:

the unchecked function

Throws:

NullPointerException - if function or exceptionMapper is null

See Also:

uncheck(), unchecked(LongFunctionWithException)

lifted

static <R,E extends Exception> LongFunction<Optional<R>> lifted(LongFunctionWithException<R,E> function)

Converts a LongFunctionWithException to a lifted Function using Optional as return value.

Type Parameters:

R - the type of the result of the function

E - the type of the potential exception

Parameters:

function - to be lifted

Returns:

the lifted function

Throws:

NullPointerException - if function is null

See Also:

lift()

ignored

static <R,E extends Exception> LongFunction<R> ignored(LongFunctionWithException<R,E> function)

Converts a LongFunctionWithException to a lifted LongFunction returning null in case of exception.

Type Parameters:

R - the type of the result of the function

E - the type of the potential exception

Parameters:

function - to be lifted

Returns:

the lifted function

Throws:

NullPointerException - if function is null

See Also:

ignore()

staged

static <R,E extends Exception> LongFunction<CompletionStage<R>> staged(LongFunctionWithException<R,E> function)

Convert this LongFunctionWithException to a lifted LongFunction return CompletionStage as return value.

Type Parameters:

R - the type of the result of the function

E - the type of the potential exception

Parameters:

function - to be lifted

Returns:

the lifted function

Throws:

NullPointerException - if function is null

See Also:

stage()