Package it.unimi.dsi.fastutil.chars

Class Char2DoubleFunctions

java.lang.Object
it.unimi.dsi.fastutil.chars.Char2DoubleFunctions
public final class Char2DoubleFunctions
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  Char2DoubleFunctions.EmptyFunction
    An immutable class representing an empty type-specific function.
    static class  Char2DoubleFunctions.PrimitiveFunction
    An adapter for mapping generic total functions to partial primitive functions.
    static class  Char2DoubleFunctions.Singleton
    An immutable class representing a type-specific singleton function.
    static class  Char2DoubleFunctions.SynchronizedFunction
    A synchronized wrapper class for functions.
    static class  Char2DoubleFunctions.UnmodifiableFunction
    An unmodifiable wrapper class for functions.

  • Field Summary

    Fields
    Modifier and Type Field Description
    static Char2DoubleFunctions.EmptyFunction EMPTY_FUNCTION
    An empty type-specific function (immutable).

  • Method Summary

    Modifier and Type Method Description
    static it.unimi.dsi.fastutil.chars.Char2DoubleFunction primitive​(java.util.function.Function<? super java.lang.Character,​? extends java.lang.Double> f)
    Returns a (partial) type-specific function based on the given total generic function.
    static it.unimi.dsi.fastutil.chars.Char2DoubleFunction singleton​(char key, double value)
    Returns a type-specific immutable function containing only the specified pair.
    static it.unimi.dsi.fastutil.chars.Char2DoubleFunction singleton​(java.lang.Character key, java.lang.Double value)
    Returns a type-specific immutable function containing only the specified pair.
    static it.unimi.dsi.fastutil.chars.Char2DoubleFunction synchronize​(it.unimi.dsi.fastutil.chars.Char2DoubleFunction f)
    Returns a synchronized type-specific function backed by the given type-specific function.
    static it.unimi.dsi.fastutil.chars.Char2DoubleFunction synchronize​(it.unimi.dsi.fastutil.chars.Char2DoubleFunction 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 it.unimi.dsi.fastutil.chars.Char2DoubleFunction unmodifiable​(it.unimi.dsi.fastutil.chars.Char2DoubleFunction 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 it.unimi.dsi.fastutil.chars.Char2DoubleFunction singleton​(char key, double 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;.

    • singleton

      public static it.unimi.dsi.fastutil.chars.Char2DoubleFunction singleton​(java.lang.Character key, java.lang.Double 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 it.unimi.dsi.fastutil.chars.Char2DoubleFunction synchronize​(it.unimi.dsi.fastutil.chars.Char2DoubleFunction 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 it.unimi.dsi.fastutil.chars.Char2DoubleFunction synchronize​(it.unimi.dsi.fastutil.chars.Char2DoubleFunction 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 it.unimi.dsi.fastutil.chars.Char2DoubleFunction unmodifiable​(it.unimi.dsi.fastutil.chars.Char2DoubleFunction 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)

    • primitive

      public static it.unimi.dsi.fastutil.chars.Char2DoubleFunction primitive​(java.util.function.Function<? super java.lang.Character,​? extends java.lang.Double> f)
      Returns a (partial) type-specific function based on the given total generic function.

      The returned function contains all keys which are not mapped to null. If the function already is a primitive function, it is returned without changes.

      Warning: If the given function is a “widened” primitive function (e.g. an Int2IntFunction given to Short2ShortFunctions), it still is wrapped into a proxy, decreasing performance.

      Parameters:
      f - the function to be converted to a type-specific function.
      Returns:
      a primitive view of the specified function.
      Throws:
      java.lang.NullPointerException - if f is null.
      Since:
      8.1.0
      See Also:
      Char2DoubleFunctions.PrimitiveFunction