Package io.github.xrickastley.sevenelements.util

Class ClassInstanceUtil

java.lang.Object

io.github.xrickastley.sevenelements.util.ClassInstanceUtil

public final class ClassInstanceUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
ClassInstanceUtil()

Method Summary

Modifier and Type	Method	Description
static <T> T	cast(Object instance)
static <T> T	castOrNull(Object instance, Class<T> castClass)	Casts the provided instance into an instance of T if it's an instance of T.
static <T, R> void	ifPresentMapped(T instance, Function<T,R> mapper, Consumer<R> ifNonNull)	If instance isn't null and mapper.apply(instance) isn't null, calls the ifNonNull consumer with the mapped value obtained from mapper.apply(instance).
static <T, R> R	mapOrNull(T instance, Function<T,R> mapper)	Maps the provided instance into R if it isn't null.

Methods inherited from class java.lang.Object

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

Constructor Details

ClassInstanceUtil

public ClassInstanceUtil()

Method Details

cast

public static <T> T cast(Object instance)

castOrNull

@Nullable
public static <T> T castOrNull(Object instance,
 Class<T> castClass)

Casts the provided instance into an instance of T if it's an instance of T.

Type Parameters:

T - The type of the instance.

Parameters:

instance - The object to cast into an instance of T

castClass - The target class of the cast.

Returns:

instance as an instance of T, null otherwise.

mapOrNull

@Nullable
public static <T,
R> R mapOrNull(@Nullable
 T instance,
 Function<T,R> mapper)

Maps the provided instance into R if it isn't null.

Type Parameters:

T - The type of the instance.

R - The type of the result.

Parameters:

instance - The instance of T to map if it isn't null.

mapper - The mapper to apply if instance isn't null

Returns:

R if instance isn't null, null otherwise.

ifPresentMapped

public static <T,
R> void ifPresentMapped(@Nullable
 T instance,
 Function<T,R> mapper,
 Consumer<R> ifNonNull)

If instance isn't null and mapper.apply(instance) isn't null, calls the ifNonNull consumer with the mapped value obtained from mapper.apply(instance).

Type Parameters:

T - The type of the instance.

R - The type of the result.

Parameters:

instance - The instance of T to map if it isn't null.

mapper - The mapper to apply if instance isn't null

ifNonNull - The consumer to call if the result of mapping the instance with mapper isn't null.