it.unimi.dsi.fastutil.objects.Reference2CharMaps.EmptyMap<K>

All Implemented Interfaces:: Function<K,Character>, Reference2CharFunction<K>, Reference2CharMap<K>, Serializable, Cloneable, Function<K,Character>, ToIntFunction<K>, Map<K,Character>

Direct Known Subclasses:: Reference2CharSortedMaps.EmptySortedMap

Enclosing class:: Reference2CharMaps

public static class Reference2CharMaps.EmptyMap<K>
extends Reference2CharFunctions.EmptyFunction<K>
implements Reference2CharMap<K>, Serializable, Cloneable

An immutable class representing an empty type-specific map.

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

See Also:: Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Reference2CharMap
Reference2CharMap.Entry<K>, Reference2CharMap.FastEntrySet<K>

Method Summary

Modifier and Type	Method	Description
`Object`	`clone()`
`boolean`	`containsValue(char v)`	Returns `true` if this map maps one or more keys to the specified value.
`boolean`	`containsValue(Object ov)`	Deprecated. Please use the corresponding type-specific method instead.
`boolean`	`equals(Object o)`
`int`	`hashCode()`
`boolean`	`isEmpty()`
`ReferenceSet<K>`	`keySet()`
`void`	`putAll(Map<? extends K,? extends Character> m)`
`ObjectSet<Reference2CharMap.Entry<K>>`	`reference2CharEntrySet()`	Returns a type-specific set view of the mappings contained in this map.
`String`	`toString()`
`CharCollection`	`values()`

Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2CharFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, getChar, size

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.Function

apply

Methods inherited from interface java.util.function.Function

andThen, compose

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, replaceAll

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2CharFunction

applyAsInt, getChar, put, removeChar

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2CharMap

clear, computeChar, computeCharIfAbsent, computeCharIfAbsentPartial, computeCharIfPresent, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, mergeChar, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

Method Details
- containsValue
  
  public boolean containsValue(char v)
  
  Description copied from interface: Reference2CharMap
  
  Returns true if this map maps one or more keys to the specified value.
  
  Specified by:
  
  containsValue in interface Reference2CharMap<K>
  
  See Also:
  
  Map.containsValue(Object)
- containsValue
  
  @Deprecated public boolean containsValue(Object ov)
  
  Deprecated.
  Please use the corresponding type-specific method instead.
  
  Specified by:
  
  containsValue in interface Map<K,Character>
  
  Specified by:
  
  containsValue in interface Reference2CharMap<K>
- putAll
  
  public void putAll(Map<? extends K,? extends Character> m)
  
  Specified by:
  
  putAll in interface Map<K,Character>
- reference2CharEntrySet
  
  public ObjectSet<Reference2CharMap.Entry<K>> reference2CharEntrySet()
  
  Description copied from interface: Reference2CharMap
  
  Returns a type-specific set view of the mappings contained in this map.
  This method is necessary because there is no inheritance along type parameters: it is thus impossible to strengthen Map.entrySet() so that it returns an ObjectSet of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).
  
  Specified by:
  
  reference2CharEntrySet in interface Reference2CharMap<K>
  
  Returns:
  
  a type-specific set view of the mappings contained in this map.
  
  See Also:
  
  Map.entrySet()
- keySet
  
  public ReferenceSet<K> keySet()
  
  Description copied from interface: Reference2CharMap
  
  Note that this specification strengthens the one given in Map.keySet().
  
  Specified by:
  
  keySet in interface Map<K,Character>
  
  Specified by:
  
  keySet in interface Reference2CharMap<K>
  
  Returns:
  
  a set view of the keys contained in this map.
  
  See Also:
  
  Map.keySet()
- values
  
  public CharCollection values()
  
  Description copied from interface: Reference2CharMap
  
  Note that this specification strengthens the one given in Map.values().
  
  Specified by:
  
  values in interface Map<K,Character>
  
  Specified by:
  
  values in interface Reference2CharMap<K>
  
  Returns:
  
  a set view of the values contained in this map.
  
  See Also:
  
  Map.values()
- clone
  
  public Object clone()
  
  Overrides:
  
  clone in class Reference2CharFunctions.EmptyFunction<K>
- isEmpty
  
  public boolean isEmpty()
  
  Specified by:
  
  isEmpty in interface Map<K,Character>
- hashCode
  
  public int hashCode()
  
  Specified by:
  
  hashCode in interface Map<K,Character>
  
  Overrides:
  
  hashCode in class Reference2CharFunctions.EmptyFunction<K>
- equals
  
  public boolean equals(Object o)
  
  Specified by:
  
  equals in interface Map<K,Character>
  
  Overrides:
  
  equals in class Reference2CharFunctions.EmptyFunction<K>
- toString
  
  public String toString()
  
  Overrides:
  
  toString in class Reference2CharFunctions.EmptyFunction<K>

Class Reference2CharMaps.EmptyMap<K>

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Reference2CharMap