uk.kludje.fn.function

Interface ULongSupplier

All Superinterfaces:

java.util.function.LongSupplier

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
 @Generated(value="uk.kludje.annotation.processor.UncheckedFunctionalInterfaceProcessor")
public interface ULongSupplier
extends java.util.function.LongSupplier

TLDR; IMPLEMENT long $getAsLong() throws Throwable USING A LAMBDA; INVOKE long getAsLong().

A functional interface for handling checked exceptions. See parent type for interface intent.

long getAsLong() invokes long $getAsLong() and throws anything thrown by long $getAsLong().

General example using java.lang.Runnable that reduces 11 lines to a single line. Call someMethodThatThrowsException in throwsNothing:

 public void someMethodThatThrowsException() throws IOException {
   // I/O functionality
 }

 public void throwsNothing(Runnable r) {
   r.run();
 }
 

Before:

 public void yourMethod() throws IOException {
   try {
     throwsNothing(() -> {
       try {
         someMethodThatThrowsException();
       } catch (IOException e) {
         throw new SomeWrapperException(e);
       }
     });
   } catch(SomeWrapperException w) {
     throw (IOException) w.getCause();
   }
 }
 

After:

 public void yourMethod() throws IOException {
   throwsNothing((URunnable) this::someMethodThatThrowsException);
 }
 

Method public static ULongSupplier asULongSupplier(ULongSupplier t) provides a convenience method for manufacturing types as an alternative to casting.

Method Summary

Modifier and Type	Method and Description
long	$getAsLong()
static ULongSupplier	asULongSupplier(ULongSupplier t)
default long	getAsLong()

Method Detail

getAsLong

default long getAsLong()

Specified by:

getAsLong in interface java.util.function.LongSupplier

$getAsLong

long $getAsLong()
         throws java.lang.Throwable

Throws:

java.lang.Throwable

asULongSupplier

static ULongSupplier asULongSupplier(ULongSupplier t)