Class Lazy<T>

java.lang.Object

net.minecraftforge.gradleutils.shared.Lazy<T>

Type Parameters:

T - The type of result

All Implemented Interfaces:

Callable<T>, Supplier<T>

Direct Known Subclasses:

Lazy.Actionable

public class Lazy<T>
extends Object
implements Supplier<T>, Callable<T>

This is a simple implementation of a Lazy value, primarily aimed for use in Java code.

See Also:

• Lazy.Actionable

API Note:

This lazy implementation uses Groovy's closures instead of typical suppliers or callables, as the closure API allows chaining via Closure.compose(Closure) and Closure.andThen(Closure). They can still be created using callables.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	Lazy.Actionable<T>	Represents a lazily computed value with the ability to optionally work with it using ifPresent(Action) and safely mutate it using Lazy.Actionable.map(Action).

Field Summary

Fields

Modifier and Type	Field	Description
protected final Closure<T>	closure	The closure that will provide the value for this lazy.
protected T	value	The value of this lazy, will be null if it has not yet been computed with get().

Method Summary

Modifier and Type	Method	Description
static <T> Lazy.Actionable<T>	actionable(Closure<T> closure)	Creates an actionable lazy of the given closure.
static <T> Lazy.Actionable<T>	actionable(Callable<T> callable)	Creates an actionable lazy of the given callable.
T	call()
T	get()	Gets (and resolves if absent) this lazy value.
final void	ifPresent(Action<? super T> action)	Runs the given action on this lazy value if it is present.
boolean	isPresent()	Checks if this lazy value is present.
static <T> Lazy<T>	simple(Closure<T> closure)	Creates a simple lazy of the given closure.
static <T> Lazy<T>	simple(Callable<T> callable)	Creates a simple lazy of the given callable.

Methods inherited from class java.lang.Object

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

Field Details

closure

protected final Closure<T> closure

The closure that will provide the value for this lazy.

value

@Nullable
protected T value

The value of this lazy, will be null if it has not yet been computed with get().

Method Details

simple

public static <T> Lazy<T> simple(Callable<T> callable)

Creates a simple lazy of the given callable.

Type Parameters:

T - The return type of the callable

Parameters:

callable - The callable to use

Returns:

The lazy value

simple

public static <T> Lazy<T> simple(Closure<T> closure)

Creates a simple lazy of the given closure.

Type Parameters:

T - The return type of the closure

Parameters:

closure - The callable to use

Returns:

The lazy value

actionable

public static <T> Lazy.Actionable<T> actionable(Callable<T> callable)

Creates an actionable lazy of the given callable.

Type Parameters:

T - The return type of the callable

Parameters:

callable - The callable to use

Returns:

The lazy value

actionable

public static <T> Lazy.Actionable<T> actionable(Closure<T> closure)

Creates an actionable lazy of the given closure.

Type Parameters:

T - The return type of the closure

Parameters:

closure - The callable to use

Returns:

The lazy value

isPresent

public boolean isPresent()

Checks if this lazy value is present. It is not a requirement that the value has to be resolved.

For simple lazies, it is simply a check if the value has been resolved. See Lazy.Actionable.isPresent() for actionable lazies.

Returns:

If this lazy is present

ifPresent

public final void ifPresent(Action<? super T> action)

Runs the given action on this lazy value if it is present.

Parameters:

action - The action to run

See Also:

• isPresent()

get

public T get()

Gets (and resolves if absent) this lazy value.

Specified by:

get in interface Supplier<T>

Returns:

The value

call

public T call()

Specified by:

call in interface Callable<T>