Package net.minecraft.util

Class Nullables

java.lang.Object
net.minecraft.util.Nullables
public class Nullables extends Object
Contains utility methods that accept or return nullable values.
Mappings:
Namespace Name
official x
intermediary net/minecraft/class_8144
named net/minecraft/util/Nullables

  • Constructor Summary

    Constructors
    Constructor
    Description
    Nullables()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static <T> T
    getFirst(Collection<T> collection)
    Returns the first element of collection, or null if it is empty.
    static <T> T
    getFirstOrElse(Collection<T> collection, T defaultValue)
    Returns the first element of collection, or defaultValue if it is empty.
    static <T> T
    getFirstOrElseGet(Collection<T> collection, Supplier<T> getter)
    Returns the first element of collection, or getter.get() if it is empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable boolean[] array)
    Returns whether array is null or empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable byte[] array)
    Returns whether array is null or empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable char[] array)
    Returns whether array is null or empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable double[] array)
    Returns whether array is null or empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable float[] array)
    Returns whether array is null or empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable int[] array)
    Returns whether array is null or empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable long[] array)
    Returns whether array is null or empty.
    static boolean
    isEmpty(@org.jetbrains.annotations.Nullable short[] array)
    Returns whether array is null or empty.
    static <T> boolean
    isEmpty(@Nullable T[] array)
    Returns whether array is null or empty.
    static <T, R> R
    map(T value, Function<T,R> mapper)
    Returns the value with mapper applied if the value is not null, otherwise null.
    static <T, R> R
    mapOrElse(T value, Function<T,R> mapper, R other)
    Returns the value with mapper applied if the value is not null, otherwise other.
    static <T, R> R
    mapOrElseGet(T value, Function<T,R> mapper, Supplier<R> getter)
    Returns the value with mapper applied if the value is not null, otherwise getter.get().

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Nullables

      public Nullables()

  • Method Details

    • map

      @Nullable public static <T, R> R map(@Nullable T value, Function<T,R> mapper)
      Returns the value with mapper applied if the value is not null, otherwise null.

      This is the nullable equivalent to Optional.map(java.util.function.Function<? super T, ? extends U>).

      Returns:
      the value with mapper applied if the value is not null, otherwise null
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a(Ljava/lang/Object;Ljava/util/function/Function;)Ljava/lang/Object;
      intermediary method_49077 Lnet/minecraft/class_8144;method_49077(Ljava/lang/Object;Ljava/util/function/Function;)Ljava/lang/Object;
      named map Lnet/minecraft/util/Nullables;map(Ljava/lang/Object;Ljava/util/function/Function;)Ljava/lang/Object;

    • mapOrElse

      public static <T, R> R mapOrElse(@Nullable T value, Function<T,R> mapper, R other)
      Returns the value with mapper applied if the value is not null, otherwise other.

      This is the nullable equivalent to Optional.map(java.util.function.Function<? super T, ? extends U>) chained with Optional.orElse(T).

      Returns:
      the value with mapper applied if the value is not null, otherwise other
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a(Ljava/lang/Object;Ljava/util/function/Function;Ljava/lang/Object;)Ljava/lang/Object;
      intermediary method_49078 Lnet/minecraft/class_8144;method_49078(Ljava/lang/Object;Ljava/util/function/Function;Ljava/lang/Object;)Ljava/lang/Object;
      named mapOrElse Lnet/minecraft/util/Nullables;mapOrElse(Ljava/lang/Object;Ljava/util/function/Function;Ljava/lang/Object;)Ljava/lang/Object;

    • mapOrElseGet

      public static <T, R> R mapOrElseGet(@Nullable T value, Function<T,R> mapper, Supplier<R> getter)
      Returns the value with mapper applied if the value is not null, otherwise getter.get().

      This is the nullable equivalent to Optional.map(java.util.function.Function<? super T, ? extends U>) chained with Optional.orElseGet(java.util.function.Supplier<? extends T>).

      Returns:
      the value with mapper applied if the value is not null, otherwise getter.get()
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a(Ljava/lang/Object;Ljava/util/function/Function;Ljava/util/function/Supplier;)Ljava/lang/Object;
      intermediary method_49079 Lnet/minecraft/class_8144;method_49079(Ljava/lang/Object;Ljava/util/function/Function;Ljava/util/function/Supplier;)Ljava/lang/Object;
      named mapOrElseGet Lnet/minecraft/util/Nullables;mapOrElseGet(Ljava/lang/Object;Ljava/util/function/Function;Ljava/util/function/Supplier;)Ljava/lang/Object;

    • getFirst

      @Nullable public static <T> T getFirst(Collection<T> collection)
      Returns the first element of collection, or null if it is empty.
      Returns:
      the first element of collection, or null if it is empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a(Ljava/util/Collection;)Ljava/lang/Object;
      intermediary method_49080 Lnet/minecraft/class_8144;method_49080(Ljava/util/Collection;)Ljava/lang/Object;
      named getFirst Lnet/minecraft/util/Nullables;getFirst(Ljava/util/Collection;)Ljava/lang/Object;

    • getFirstOrElse

      public static <T> T getFirstOrElse(Collection<T> collection, T defaultValue)
      Returns the first element of collection, or defaultValue if it is empty.
      Returns:
      the first element of collection, or defaultValue if it is empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a(Ljava/util/Collection;Ljava/lang/Object;)Ljava/lang/Object;
      intermediary method_49081 Lnet/minecraft/class_8144;method_49081(Ljava/util/Collection;Ljava/lang/Object;)Ljava/lang/Object;
      named getFirstOrElse Lnet/minecraft/util/Nullables;getFirstOrElse(Ljava/util/Collection;Ljava/lang/Object;)Ljava/lang/Object;

    • getFirstOrElseGet

      public static <T> T getFirstOrElseGet(Collection<T> collection, Supplier<T> getter)
      Returns the first element of collection, or getter.get() if it is empty.
      Returns:
      the first element of collection, or getter.get() if it is empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a(Ljava/util/Collection;Ljava/util/function/Supplier;)Ljava/lang/Object;
      intermediary method_49082 Lnet/minecraft/class_8144;method_49082(Ljava/util/Collection;Ljava/util/function/Supplier;)Ljava/lang/Object;
      named getFirstOrElseGet Lnet/minecraft/util/Nullables;getFirstOrElseGet(Ljava/util/Collection;Ljava/util/function/Supplier;)Ljava/lang/Object;

    • isEmpty

      public static <T> boolean isEmpty(@Nullable @Nullable T[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([Ljava/lang/Object;)Z
      intermediary method_49089 Lnet/minecraft/class_8144;method_49089([Ljava/lang/Object;)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([Ljava/lang/Object;)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable boolean[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([Z)Z
      intermediary method_49091 Lnet/minecraft/class_8144;method_49091([Z)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([Z)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable byte[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([B)Z
      intermediary method_49083 Lnet/minecraft/class_8144;method_49083([B)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([B)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable char[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([C)Z
      intermediary method_49084 Lnet/minecraft/class_8144;method_49084([C)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([C)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable short[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([S)Z
      intermediary method_49090 Lnet/minecraft/class_8144;method_49090([S)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([S)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable int[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([I)Z
      intermediary method_49087 Lnet/minecraft/class_8144;method_49087([I)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([I)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable long[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([J)Z
      intermediary method_49088 Lnet/minecraft/class_8144;method_49088([J)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([J)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable float[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([F)Z
      intermediary method_49086 Lnet/minecraft/class_8144;method_49086([F)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([F)Z

    • isEmpty

      public static boolean isEmpty(@Nullable @org.jetbrains.annotations.Nullable double[] array)
      Returns whether array is null or empty.
      Returns:
      whether array is null or empty
      Mappings:
      Namespace Name Mixin selector
      official a Lx;a([D)Z
      intermediary method_49085 Lnet/minecraft/class_8144;method_49085([D)Z
      named isEmpty Lnet/minecraft/util/Nullables;isEmpty([D)Z