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:
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 groovy.lang.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(groovy.lang.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(org.gradle.api.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(groovy.lang.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 groovy.lang.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(groovy.lang.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(groovy.lang.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(org.gradle.api.Action<? super T> action)
      Runs the given action on this lazy value if it is present.
      Parameters:
      action - The action to run
      See Also:

    • 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>