Package pl.matsuo.core.util.function

Class FunctionalUtil

java.lang.Object

pl.matsuo.core.util.function.FunctionalUtil

public class FunctionalUtil
extends Object

Functional programming utils.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FunctionalUtil.AccessProvider<E>	Objects provide access to some element.

Field Summary

Fields

Modifier and Type	Field	Description
static final Consumer<Exception>	ignoringExConsumer	Consumer of exception that logs error.
static final Consumer<Exception>	runtimeExConsumer	Consumer that throws RuntimeException with passed exception as root cause.

Constructor Summary

Constructors

Constructor	Description
FunctionalUtil()

Method Summary

Modifier and Type	Method	Description
static <E> FunctionalUtil.AccessProvider<E>	access(Object object, Field field)	Create access provider from field on object.
static <E> FunctionalUtil.AccessProvider<E>	access(Supplier<E> getter, Consumer<E> setter)	Create access provider from getter/setter pair.
static <E> List<E>	collectList(Supplier<Boolean> condition, Supplier<E> getter)	Collect elements returned by getter until condition is true;
static <E> Consumer<E>	compose(Consumer<? super E>... parts)	Create consumer that invokes list of inner consumers.
static <E> E	either(boolean what, Supplier<E> ifTrue, Supplier<E> ifFalse)	Invoke ifTrue or ifFalse depending on what parameter.
static void	ignoreEx(ThrowingExceptionsRunnable throwsExceptions)	Invoke runnable and ignore exceptions.
static <E> E	ignoreEx(ThrowingExceptionsSupplier<E> throwsExceptions)	Invoke supplier and return null on exception.
static void	processEx(ThrowingExceptionsRunnable throwsExceptions, Consumer<Exception> processEx)	Invoke runnable with exception handler.
static <E> E	processEx(ThrowingExceptionsSupplier<E> throwsExceptions, Function<Exception,E> processEx)	Invoke supplier with exception handler.
static void	repeat(Supplier<Boolean> condition, Runnable exec)	Repeat runnable invocations until condition is true.
static void	runtimeEx(ThrowingExceptionsRunnable throwsExceptions)	Invoke runnable and throw RuntimeException on exception.
static void	runtimeEx(ThrowingExceptionsRunnable throwsExceptions, Consumer<Exception> processEx)	Invoke runnable with exception handler.
static <E> E	runtimeEx(ThrowingExceptionsSupplier<E> throwsExceptions)	Invoke supplier and throw RuntimeException on exception.
static <E, F> F	transform(E object, Function<E,F> invoke)	Return function invocation result with object as parameter.
static <E, F> void	with(E object, F object2, BiConsumer<E,F> invoke)	Invoke consumer with two objects as parameters.
static <E> E	with(E object, Consumer<E> invoke)	Invoke consumer with object as parameter.

Methods inherited from class java.lang.Object

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

Field Details

ignoringExConsumer

public static final Consumer<Exception> ignoringExConsumer

Consumer of exception that logs error.

runtimeExConsumer

public static final Consumer<Exception> runtimeExConsumer

Consumer that throws RuntimeException with passed exception as root cause.

Constructor Details

FunctionalUtil

public FunctionalUtil()

Method Details

access

public static <E> FunctionalUtil.AccessProvider<E> access(Supplier<E> getter,
 Consumer<E> setter)

Create access provider from getter/setter pair.

access

public static <E> FunctionalUtil.AccessProvider<E> access(Object object,
 Field field)

Create access provider from field on object.

with

public static <E> E with(E object,
 Consumer<E> invoke)

Invoke consumer with object as parameter.

transform

public static <E,
F> F transform(E object,
 Function<E,F> invoke)

Return function invocation result with object as parameter.

with

public static <E,
F> void with(E object,
 F object2,
 BiConsumer<E,F> invoke)

Invoke consumer with two objects as parameters.

ignoreEx

public static <E> E ignoreEx(ThrowingExceptionsSupplier<E> throwsExceptions)

Invoke supplier and return null on exception.

ignoreEx

public static void ignoreEx(ThrowingExceptionsRunnable throwsExceptions)

Invoke runnable and ignore exceptions.

runtimeEx

public static <E> E runtimeEx(ThrowingExceptionsSupplier<E> throwsExceptions)

Invoke supplier and throw RuntimeException on exception.

runtimeEx

public static void runtimeEx(ThrowingExceptionsRunnable throwsExceptions)

Invoke runnable and throw RuntimeException on exception.

runtimeEx

public static void runtimeEx(ThrowingExceptionsRunnable throwsExceptions,
 Consumer<Exception> processEx)

Invoke runnable with exception handler.

processEx

public static <E> E processEx(ThrowingExceptionsSupplier<E> throwsExceptions,
 Function<Exception,E> processEx)

Invoke supplier with exception handler.

processEx

public static void processEx(ThrowingExceptionsRunnable throwsExceptions,
 Consumer<Exception> processEx)

Invoke runnable with exception handler.

compose

public static <E> Consumer<E> compose(Consumer<? super E>... parts)

Create consumer that invokes list of inner consumers.

either

public static <E> E either(boolean what,
 Supplier<E> ifTrue,
 Supplier<E> ifFalse)

Invoke ifTrue or ifFalse depending on what parameter.

repeat

public static void repeat(Supplier<Boolean> condition,
 Runnable exec)

Repeat runnable invocations until condition is true.

collectList

public static <E> List<E> collectList(Supplier<Boolean> condition,
 Supplier<E> getter)

Collect elements returned by getter until condition is true;