eu.fthevenet.util.function

Class CheckedLambdas

java.lang.Object

eu.fthevenet.util.function.CheckedLambdas

public final class CheckedLambdas
extends java.lang.Object

A series of methods that wrap functional interfaces that throw checked exceptions inside their standard (non throwing) counterparts, so they can be used with streams or other classes expecting standards functional interfaces and have them acting transparent to the exception thrown within the lambda.

Author:

Frederic Thevenet

Method Summary

Modifier and Type	Method and Description
static <T,E extends java.lang.Exception> java.util.function.Consumer<T>	wrap(CheckedConsumer<T,E> consumer) Wraps a CheckedConsumer inside a Consumer and rethrow the original exception.
static <T,R,E extends java.lang.Exception> java.util.function.Function<T,R>	wrap(CheckedFunction<T,R,E> function) Wraps a CheckedFunction inside a Function and rethrow the original exception.
static <E extends java.lang.Exception> java.lang.Runnable	wrap(CheckedRunnable<E> runnable) Wraps a CheckedRunnable inside a Runnable and rethrow the original exception.
static <T,E extends java.lang.Exception> java.util.function.Supplier<T>	wrap(CheckedSupplier<T,E> supplier) Wraps a CheckedSupplier inside a Supplier and rethrow the original exception.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

wrap

public static <T,E extends java.lang.Exception> java.util.function.Consumer<T> wrap(CheckedConsumer<T,E> consumer)
                                                                             throws E extends java.lang.Exception

Wraps a CheckedConsumer inside a Consumer and rethrow the original exception.

Type Parameters:

T - the type for the consumer's parameter.

E - the type for the checked exception.

Parameters:

consumer - the Consumer to wrap.

Returns:

a Consumer instance.

Throws:

E - the checked exception thrown in the lambda.

E extends java.lang.Exception

wrap

public static <E extends java.lang.Exception> java.lang.Runnable wrap(CheckedRunnable<E> runnable)
                                                               throws E extends java.lang.Exception

Wraps a CheckedRunnable inside a Runnable and rethrow the original exception.

Type Parameters:

E - the type for the checked exception.

Parameters:

runnable - the Runnable to wrap.

Returns:

a Runnable instance.

Throws:

E - the checked exception thrown in the lambda.

E extends java.lang.Exception

wrap

public static <T,E extends java.lang.Exception> java.util.function.Supplier<T> wrap(CheckedSupplier<T,E> supplier)
                                                                             throws E extends java.lang.Exception

Wraps a CheckedSupplier inside a Supplier and rethrow the original exception.

Type Parameters:

T - the type for the supplier's parameter.

E - the type for the checked exception.

Parameters:

supplier - the Supplier to wrap.

Returns:

a Supplier instance.

Throws:

E - the checked exception thrown in the lambda.

E extends java.lang.Exception

wrap

public static <T,R,E extends java.lang.Exception> java.util.function.Function<T,R> wrap(CheckedFunction<T,R,E> function)
                                                                                 throws E extends java.lang.Exception

Wraps a CheckedFunction inside a Function and rethrow the original exception.

Type Parameters:

T - the type for the function's parameter.

R - the return type of the function.

E - the type for the checked exception.

Parameters:

function - the Function to wrap.

Returns:

a Function instance.

Throws:

E - the checked exception thrown in the lambda.

E extends java.lang.Exception