Package it.unimi.dsi.fastutil.objects

Class Reference2ObjectFunctions

java.lang.Object
it.unimi.dsi.fastutil.objects.Reference2ObjectFunctions
public final class Reference2ObjectFunctions
extends java.lang.Object
A class providing static methods and objects that do useful things with type-specific functions.
See Also:
Function, Collections

  • Nested Class Summary

    Nested Classes
    Modifier and Type Class Description
    static class  Reference2ObjectFunctions.EmptyFunction<K,​V>
    An immutable class representing an empty type-specific function.
    static class  Reference2ObjectFunctions.Singleton<K,​V>
    An immutable class representing a type-specific singleton function.
    static class  Reference2ObjectFunctions.SynchronizedFunction<K,​V>
    A synchronized wrapper class for functions.
    static class  Reference2ObjectFunctions.UnmodifiableFunction<K,​V>
    An unmodifiable wrapper class for functions.

  • Field Summary

    Fields
    Modifier and Type Field Description
    static Reference2ObjectFunctions.EmptyFunction EMPTY_FUNCTION
    An empty type-specific function (immutable).

  • Method Summary

    Modifier and Type Method Description
    static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> singleton​(K key, V value)
    Returns a type-specific immutable function containing only the specified pair.
    static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> synchronize​(it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> f)
    Returns a synchronized type-specific function backed by the given type-specific function.
    static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> synchronize​(it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> f, java.lang.Object sync)
    Returns a synchronized type-specific function backed by the given type-specific function, using an assigned object to synchronize.
    static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> unmodifiable​(it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<? extends K,​? extends V> f)
    Returns an unmodifiable type-specific function backed by the given type-specific function.

    Methods inherited from class java.lang.Object

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

  • Field Details

  • Method Details

    • singleton

      public static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> singleton​(K key, V value)
      Returns a type-specific immutable function containing only the specified pair. The returned function is serializable and cloneable.

      Note that albeit the returned function is immutable, its default return value may be changed.

      Parameters:
      key - the only key of the returned function.
      value - the only value of the returned function.
      Returns:
      a type-specific immutable function containing just the pair &lt;key,value&gt;.

    • synchronize

      public static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> synchronize​(it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> f)
      Returns a synchronized type-specific function backed by the given type-specific function.
      Parameters:
      f - the function to be wrapped in a synchronized function.
      Returns:
      a synchronized view of the specified function.
      See Also:
      Collections.synchronizedMap(java.util.Map)

    • synchronize

      public static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> synchronize​(it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> f, java.lang.Object sync)
      Returns a synchronized type-specific function backed by the given type-specific function, using an assigned object to synchronize.
      Parameters:
      f - the function to be wrapped in a synchronized function.
      sync - an object that will be used to synchronize the access to the function.
      Returns:
      a synchronized view of the specified function.
      See Also:
      Collections.synchronizedMap(java.util.Map)

    • unmodifiable

      public static <K,​ V> it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<K,​V> unmodifiable​(it.unimi.dsi.fastutil.objects.Reference2ObjectFunction<? extends K,​? extends V> f)
      Returns an unmodifiable type-specific function backed by the given type-specific function.
      Parameters:
      f - the function to be wrapped in an unmodifiable function.
      Returns:
      an unmodifiable view of the specified function.
      See Also:
      Collections.unmodifiableMap(java.util.Map)