it.unimi.dsi.fastutil.longs.Long2LongMaps.EmptyMap

All Implemented Interfaces:: Function<Long,Long>, Long2LongFunction, Long2LongMap, Serializable, Cloneable, Function<Long,Long>, LongUnaryOperator, Map<Long,Long>

Direct Known Subclasses:: Long2LongSortedMaps.EmptySortedMap

Enclosing class:: Long2LongMaps

public static class Long2LongMaps.EmptyMap
extends Long2LongFunctions.EmptyFunction
implements Long2LongMap, 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.longs.Long2LongMap
Long2LongMap.Entry, Long2LongMap.FastEntrySet

Method Summary

Modifier and Type	Method	Description
`Object`	`clone()`
`boolean`	`containsValue(long 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()`
`LongSet`	`keySet()`
`ObjectSet<Long2LongMap.Entry>`	`long2LongEntrySet()`	Returns a type-specific set view of the mappings contained in this map.
`void`	`putAll(Map<? extends Long,? extends Long> m)`
`String`	`toString()`
`LongCollection`	`values()`

Methods inherited from class it.unimi.dsi.fastutil.longs.Long2LongFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, get, 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 it.unimi.dsi.fastutil.longs.Long2LongFunction

applyAsLong, get, put, remove

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2LongMap

clear, compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, merge, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

Methods inherited from interface java.util.function.LongUnaryOperator

andThen, compose

Methods inherited from interface java.util.Map

forEach, replaceAll

Method Details
- containsValue
  
  public boolean containsValue(long v)
  
  Description copied from interface: Long2LongMap
  
  Returns true if this map maps one or more keys to the specified value.
  
  Specified by:
  
  containsValue in interface Long2LongMap
  
  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 Long2LongMap
  
  Specified by:
  
  containsValue in interface Map<Long,Long>
- putAll
  
  public void putAll(Map<? extends Long,? extends Long> m)
  
  Specified by:
  
  putAll in interface Map<Long,Long>
- long2LongEntrySet
  
  public ObjectSet<Long2LongMap.Entry> long2LongEntrySet()
  
  Description copied from interface: Long2LongMap
  
  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:
  
  long2LongEntrySet in interface Long2LongMap
  
  Returns:
  
  a type-specific set view of the mappings contained in this map.
  
  See Also:
  
  Map.entrySet()
- keySet
  
  public LongSet keySet()
  
  Description copied from interface: Long2LongMap
  
  Note that this specification strengthens the one given in Map.keySet().
  
  Specified by:
  
  keySet in interface Long2LongMap
  
  Specified by:
  
  keySet in interface Map<Long,Long>
  
  Returns:
  
  a set view of the keys contained in this map.
  
  See Also:
  
  Map.keySet()
- values
  
  public LongCollection values()
  
  Description copied from interface: Long2LongMap
  
  Note that this specification strengthens the one given in Map.values().
  
  Specified by:
  
  values in interface Long2LongMap
  
  Specified by:
  
  values in interface Map<Long,Long>
  
  Returns:
  
  a set view of the values contained in this map.
  
  See Also:
  
  Map.values()
- clone
  
  public Object clone()
  
  Overrides:
  
  clone in class Long2LongFunctions.EmptyFunction
- isEmpty
  
  public boolean isEmpty()
  
  Specified by:
  
  isEmpty in interface Map<Long,Long>
- hashCode
  
  public int hashCode()
  
  Specified by:
  
  hashCode in interface Map<Long,Long>
  
  Overrides:
  
  hashCode in class Long2LongFunctions.EmptyFunction
- equals
  
  public boolean equals(Object o)
  
  Specified by:
  
  equals in interface Map<Long,Long>
  
  Overrides:
  
  equals in class Long2LongFunctions.EmptyFunction
- toString
  
  public String toString()
  
  Overrides:
  
  toString in class Long2LongFunctions.EmptyFunction

Class Long2LongMaps.EmptyMap

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.longs.Long2LongMap