it.unimi.dsi.fastutil.objects

Class Reference2LongMaps.EmptyMap<K>

java.lang.Object

it.unimi.dsi.fastutil.objects.AbstractReference2LongFunction<K>

it.unimi.dsi.fastutil.objects.Reference2LongFunctions.EmptyFunction<K>

it.unimi.dsi.fastutil.objects.Reference2LongMaps.EmptyMap<K>

All Implemented Interfaces:

Function<K,Long>, Reference2LongFunction<K>, Reference2LongMap<K>, Serializable, Cloneable, Map<K,Long>

Direct Known Subclasses:

Reference2LongSortedMaps.EmptySortedMap

Enclosing class:

Reference2LongMaps

public static class Reference2LongMaps.EmptyMap<K>
extends Reference2LongFunctions.EmptyFunction<K>
implements Reference2LongMap<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.Reference2LongMap

Reference2LongMap.Entry<K>, Reference2LongMap.FastEntrySet<K>

Method Summary

Modifier and Type	Method and Description
Object	clone()
boolean	containsValue(long v)
boolean	containsValue(Object ov)
ObjectSet<Map.Entry<K,Long>>	entrySet() Returns a set view of the mappings contained in this map.
boolean	equals(Object o)
int	hashCode()
boolean	isEmpty()
ReferenceSet<K>	keySet() Returns a set view of the keys contained in this map.
void	putAll(Map<? extends K,? extends Long> m)
ObjectSet<Reference2LongMap.Entry<K>>	reference2LongEntrySet() Returns a type-specific set view of the mappings contained in this map.
String	toString()
LongCollection	values() Returns a set view of the values contained in this map.

Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2LongFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, getLong, size

Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractReference2LongFunction

get, put, put, remove, removeLong

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2LongFunction

defaultReturnValue, defaultReturnValue, getLong, put, removeLong

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

clear, containsKey, get, put, remove, size

Methods inherited from interface java.util.Map

clear, compute, computeIfAbsent, computeIfPresent, containsKey, forEach, get, getOrDefault, merge, put, putIfAbsent, remove, remove, replace, replace, replaceAll, size

Method Detail

containsValue

public boolean containsValue(long v)

Specified by:

containsValue in interface Reference2LongMap<K>

See Also:

Map.containsValue(Object)

putAll

public void putAll(Map<? extends K,? extends Long> m)

Specified by:

putAll in interface Map<K,Long>

reference2LongEntrySet

public ObjectSet<Reference2LongMap.Entry<K>> reference2LongEntrySet()

Description copied from interface: Reference2LongMap

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 Reference2LongMap.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:

reference2LongEntrySet in interface Reference2LongMap<K>

Returns:

a type-specific set view of the mappings contained in this map.

See Also:

Reference2LongMap.entrySet()

keySet

public ReferenceSet<K> keySet()

Description copied from interface: Reference2LongMap

Returns a set view of the keys contained in this map.

Note that this specification strengthens the one given in Map.keySet().

Specified by:

keySet in interface Reference2LongMap<K>

Specified by:

keySet in interface Map<K,Long>

Returns:

a set view of the keys contained in this map.

See Also:

Map.keySet()

values

public LongCollection values()

Description copied from interface: Reference2LongMap

Returns a set view of the values contained in this map.

Note that this specification strengthens the one given in Map.values().

Specified by:

values in interface Reference2LongMap<K>

Specified by:

values in interface Map<K,Long>

Returns:

a set view of the values contained in this map.

See Also:

Map.values()

containsValue

public boolean containsValue(Object ov)

Specified by:

containsValue in interface Map<K,Long>

clone

public Object clone()

Overrides:

clone in class Reference2LongFunctions.EmptyFunction<K>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,Long>

entrySet

public ObjectSet<Map.Entry<K,Long>> entrySet()

Description copied from interface: Reference2LongMap

Returns a set view of the mappings contained in this map.

Note that this specification strengthens the one given in Map.entrySet().

Specified by:

entrySet in interface Reference2LongMap<K>

Specified by:

entrySet in interface Map<K,Long>

Returns:

a set view of the mappings contained in this map.

See Also:

Map.entrySet()

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K,Long>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<K,Long>

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object