it.unimi.dsi.fastutil.longs

Class Long2ObjectMaps.EmptyMap<V>

java.lang.Object

it.unimi.dsi.fastutil.longs.AbstractLong2ObjectFunction<V>

it.unimi.dsi.fastutil.longs.Long2ObjectFunctions.EmptyFunction<V>

it.unimi.dsi.fastutil.longs.Long2ObjectMaps.EmptyMap<V>

All Implemented Interfaces:

Function<Long,V>, Long2ObjectFunction<V>, Long2ObjectMap<V>, Serializable, Cloneable, Map<Long,V>

Direct Known Subclasses:

Long2ObjectSortedMaps.EmptySortedMap

Enclosing class:

Long2ObjectMaps

public static class Long2ObjectMaps.EmptyMap<V>
extends Long2ObjectFunctions.EmptyFunction<V>
implements Long2ObjectMap<V>, 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.Long2ObjectMap

Long2ObjectMap.Entry<V>, Long2ObjectMap.FastEntrySet<V>

Method Summary

Modifier and Type	Method and Description
Object	clone()
boolean	containsValue(Object v)
ObjectSet<Map.Entry<Long,V>>	entrySet() Returns a set view of the mappings contained in this map.
boolean	equals(Object o)
int	hashCode()
boolean	isEmpty()
LongSet	keySet() Returns a set view of the keys contained in this map.
ObjectSet<Long2ObjectMap.Entry<V>>	long2ObjectEntrySet() Returns a type-specific set view of the mappings contained in this map.
void	putAll(Map<? extends Long,? extends V> m)
String	toString()
ObjectCollection<V>	values() Returns a set view of the values contained in this map.

Methods inherited from class it.unimi.dsi.fastutil.longs.Long2ObjectFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, get, get, size

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2ObjectFunction

containsKey, put, put, remove, remove

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2ObjectFunction

containsKey, defaultReturnValue, defaultReturnValue, get, put, remove

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(Object v)

Specified by:

containsValue in interface Map<Long,V>

putAll

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

Specified by:

putAll in interface Map<Long,V>

long2ObjectEntrySet

public ObjectSet<Long2ObjectMap.Entry<V>> long2ObjectEntrySet()

Description copied from interface: Long2ObjectMap

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 Long2ObjectMap.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:

long2ObjectEntrySet in interface Long2ObjectMap<V>

Returns:

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

See Also:

Long2ObjectMap.entrySet()

keySet

public LongSet keySet()

Description copied from interface: Long2ObjectMap

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 Long2ObjectMap<V>

Specified by:

keySet in interface Map<Long,V>

Returns:

a set view of the keys contained in this map.

See Also:

Map.keySet()

values

public ObjectCollection<V> values()

Description copied from interface: Long2ObjectMap

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 Long2ObjectMap<V>

Specified by:

values in interface Map<Long,V>

Returns:

a set view of the values contained in this map.

See Also:

Map.values()

clone

public Object clone()

Overrides:

clone in class Long2ObjectFunctions.EmptyFunction<V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Long,V>

entrySet

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

Description copied from interface: Long2ObjectMap

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 Long2ObjectMap<V>

Specified by:

entrySet in interface Map<Long,V>

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<Long,V>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Long,V>

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object