Package it.unimi.dsi.fastutil.chars

Class Char2ByteFunctions.EmptyFunction

java.lang.Object
it.unimi.dsi.fastutil.chars.AbstractChar2ByteFunction
it.unimi.dsi.fastutil.chars.Char2ByteFunctions.EmptyFunction
All Implemented Interfaces:
Char2ByteFunction, it.unimi.dsi.fastutil.Function<java.lang.Character,​java.lang.Byte>, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<java.lang.Character,​java.lang.Byte>, java.util.function.IntUnaryOperator
Direct Known Subclasses:
Char2ByteMaps.EmptyMap
Enclosing class:
Char2ByteFunctions
public static class Char2ByteFunctions.EmptyFunction
extends AbstractChar2ByteFunction
implements java.io.Serializable, java.lang.Cloneable
An immutable class representing an empty type-specific function.

This class may be useful to implement your own in case you subclass a type-specific function.

See Also:
Serialized Form

  • Method Details

    • get

      public byte get​(char k)
      Description copied from interface: Char2ByteFunction
      Returns the value to which the given key is mapped.
      Specified by:
      get in interface Char2ByteFunction
      Parameters:
      k - the key.
      Returns:
      the corresponding value, or the default return value if no value was present for the given key.
      See Also:
      Function.get(Object)

    • getOrDefault

      public byte getOrDefault​(char k, byte defaultValue)
      Description copied from interface: Char2ByteFunction
      Returns the value associated by this function to the specified key, or give the specified value if not present.
      Specified by:
      getOrDefault in interface Char2ByteFunction
      Parameters:
      k - the key.
      defaultValue - the value to return if not present.
      Returns:
      the corresponding value, or defaultValue if no value was present for the given key.
      See Also:
      Function.getOrDefault(Object, Object)

    • containsKey

      public boolean containsKey​(char k)
      Description copied from interface: Char2ByteFunction
      Returns true if this function contains a mapping for the specified key.

      Note that for some kind of functions (e.g., hashes) this method will always return true. In particular, this default implementation always returns true.

      Specified by:
      containsKey in interface Char2ByteFunction
      Parameters:
      k - the key.
      Returns:
      true if this function associates a value to key.
      See Also:
      Function.containsKey(Object)

    • defaultReturnValue

      public byte defaultReturnValue()
      Description copied from interface: Char2ByteFunction
      Gets the default return value.

      This default implementation just return the default null value of the type (null for objects, 0 for scalars, false for Booleans).

      Specified by:
      defaultReturnValue in interface Char2ByteFunction
      Overrides:
      defaultReturnValue in class AbstractChar2ByteFunction
      Returns:
      the current default return value.

    • defaultReturnValue

      public void defaultReturnValue​(byte defRetValue)
      Description copied from interface: Char2ByteFunction
      Sets the default return value (optional operation). This value must be returned by type-specific versions of get(), put() and remove() to denote that the map does not contain the specified key. It must be 0/false/null by default.
      Specified by:
      defaultReturnValue in interface Char2ByteFunction
      Overrides:
      defaultReturnValue in class AbstractChar2ByteFunction
      Parameters:
      defRetValue - the new default return value.
      See Also:
      Char2ByteFunction.defaultReturnValue()

    • size

      public int size()
      Specified by:
      size in interface it.unimi.dsi.fastutil.Function<java.lang.Character,​java.lang.Byte>

    • clear

      public void clear()
      Specified by:
      clear in interface it.unimi.dsi.fastutil.Function<java.lang.Character,​java.lang.Byte>

    • clone

      public java.lang.Object clone()

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class java.lang.Object

    • equals

      public boolean equals​(java.lang.Object o)
      Overrides:
      equals in class java.lang.Object

    • toString

      public java.lang.String toString()
      Overrides:
      toString in class java.lang.Object