Package it.unimi.dsi.fastutil.longs
Class Long2LongMaps.EmptyMap
- java.lang.Object
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- it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction
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- it.unimi.dsi.fastutil.longs.Long2LongFunctions.EmptyFunction
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- it.unimi.dsi.fastutil.longs.Long2LongMaps.EmptyMap
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- 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
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Nested Class Summary
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Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.longs.Long2LongMap
Long2LongMap.Entry, Long2LongMap.FastEntrySet
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description Object
clone()
boolean
containsValue(long v)
Returnstrue
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()
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Methods inherited from class it.unimi.dsi.fastutil.longs.Long2LongFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, get, size
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Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2LongFunction
andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsLong, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, remove
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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
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Methods inherited from interface java.util.function.LongUnaryOperator
andThen, compose
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Methods inherited from interface java.util.Map
forEach, replaceAll
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Method Detail
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containsValue
public boolean containsValue(long v)
Description copied from interface:Long2LongMap
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceLong2LongMap
- See Also:
Map.containsValue(Object)
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containsValue
@Deprecated public boolean containsValue(Object ov)
Deprecated.Please use the corresponding type-specific method instead.- Specified by:
containsValue
in interfaceLong2LongMap
- Specified by:
containsValue
in interfaceMap<Long,Long>
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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 anObjectSet
of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).- Specified by:
long2LongEntrySet
in interfaceLong2LongMap
- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
Map.entrySet()
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keySet
public LongSet keySet()
Description copied from interface:Long2LongMap
Note that this specification strengthens the one given in
Map.keySet()
.- Specified by:
keySet
in interfaceLong2LongMap
- Specified by:
keySet
in interfaceMap<Long,Long>
- Returns:
- a set view of the keys contained in this map.
- See Also:
Map.keySet()
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values
public LongCollection values()
Description copied from interface:Long2LongMap
Note that this specification strengthens the one given in
Map.values()
.- Specified by:
values
in interfaceLong2LongMap
- Specified by:
values
in interfaceMap<Long,Long>
- Returns:
- a set view of the values contained in this map.
- See Also:
Map.values()
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clone
public Object clone()
- Overrides:
clone
in classLong2LongFunctions.EmptyFunction
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hashCode
public int hashCode()
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equals
public boolean equals(Object o)
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toString
public String toString()
- Overrides:
toString
in classLong2LongFunctions.EmptyFunction
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