Apache Log4j API 2.22.0 · org.apache.logging.log4j.util.Lazy

Method Summary

Modifier and Type	Method and Description
public default T	get() Implements java.util.function.Supplier.get. Returns the value held by this lazy.
public boolean	isInitialized() Indicates whether this lazy value has been initialized.
public static <T> Lazy<T>	lazy(final Supplier<T> supplier) Creates a strict lazy value using the provided Supplier.
public default <R> Lazy<R>	map(final Function<? super T, ? extends R> function) Creates a new lazy value derived from this lazy value using the provided value mapping function.
public static <T> Lazy<T>	pure(final Supplier<T> supplier) Creates a pure lazy value using the provided Supplier to initialize the value.
public void	set(final T newValue) Sets this lazy value to the provided value.
public T	value() Returns the value held by this lazy.
public static <T> Lazy<T>	value(final T value) Creates a lazy value using the provided constant value.
public static <T> Lazy<T>	weak(final T value) Creates a lazy value using a weak reference to the provided value.

get	back to summary
public default T get() Implements java.util.function.Supplier.get. Returns the value held by this lazy. This may cause the value to initialize if it hasn't been already. Returns:T Doc from java.util.function.Supplier.get. a result Annotations @Override

get

public default T get()

Returns the value held by this lazy. This may cause the value to initialize if it hasn't been already.

Returns:T

Doc from java.util.function.Supplier.get.

a result

Annotations

isInitialized	back to summary
public boolean isInitialized() Indicates whether this lazy value has been initialized.

lazy	back to summary
public static <T> Lazy<T> lazy(final Supplier<T> supplier) Creates a strict lazy value using the provided Supplier. The supplier is guaranteed to only be invoked by at most one thread, and all threads will see the same published value when this returns.

map	back to summary
public default <R> Lazy<R> map(final Function<? super T, ? extends R> function) Creates a new lazy value derived from this lazy value using the provided value mapping function.

pure	back to summary
public static <T> Lazy<T> pure(final Supplier<T> supplier) Creates a pure lazy value using the provided Supplier to initialize the value. The supplier may be invoked more than once, and the return value should be a purely computed value as the result may be a different instance each time. This is useful for building cache tables and other pure computations.

set	back to summary
public void set(final T newValue) Sets this lazy value to the provided value. Exceptions UnsupportedOperationException: if this type of lazy value cannot be updated

set

public void set(final T newValue)

Sets this lazy value to the provided value.

Exceptions

UnsupportedOperationException:: if this type of lazy value cannot be updated

value	back to summary
public T value() Returns the value held by this lazy. This may cause the value to initialize if it hasn't been already.

value	back to summary
public static <T> Lazy<T> value(final T value) Creates a lazy value using the provided constant value.

weak	back to summary
public static <T> Lazy<T> weak(final T value) Creates a lazy value using a weak reference to the provided value.