it.unimi.dsi.fastutil.longs

Class Long2ReferenceMaps.EmptyMap<V>

java.lang.Object

it.unimi.dsi.fastutil.longs.AbstractLong2ReferenceFunction<V>

it.unimi.dsi.fastutil.longs.Long2ReferenceFunctions.EmptyFunction<V>

it.unimi.dsi.fastutil.longs.Long2ReferenceMaps.EmptyMap<V>

All Implemented Interfaces:

Function<Long,V>, Long2ReferenceFunction<V>, Long2ReferenceMap<V>, Serializable, Cloneable, Map<Long,V>

Direct Known Subclasses:

Long2ReferenceSortedMaps.EmptySortedMap

Enclosing class:

Long2ReferenceMaps

public static class Long2ReferenceMaps.EmptyMap<V>
extends Long2ReferenceFunctions.EmptyFunction<V>
implements Long2ReferenceMap<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.Long2ReferenceMap

Long2ReferenceMap.Entry<V>, Long2ReferenceMap.FastEntrySet<V>

Method Summary

Methods

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<Long2ReferenceMap.Entry<V>>	long2ReferenceEntrySet() Returns a type-specific set view of the mappings contained in this map.
void	putAll(Map<? extends Long,? extends V> m)
String	toString()
ReferenceCollection<V>	values() Returns a set view of the values contained in this map.

Methods inherited from class it.unimi.dsi.fastutil.longs.Long2ReferenceFunctions.EmptyFunction

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

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2ReferenceFunction

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.Long2ReferenceFunction

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, containsKey, get, put, remove, 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>

long2ReferenceEntrySet

public ObjectSet<Long2ReferenceMap.Entry<V>> long2ReferenceEntrySet()

Description copied from interface: Long2ReferenceMap

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 Long2ReferenceMap.entrySet() so that it returns an ObjectSet of objects of type Map.Entry (the latter makes it possible to access keys and values with type-specific methods).

Specified by:

long2ReferenceEntrySet in interface Long2ReferenceMap<V>

Returns:

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

See Also:

Long2ReferenceMap.entrySet()

keySet

public LongSet keySet()

Description copied from interface: Long2ReferenceMap

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 Long2ReferenceMap<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 ReferenceCollection<V> values()

Description copied from interface: Long2ReferenceMap

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 Long2ReferenceMap<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 Long2ReferenceFunctions.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: Long2ReferenceMap

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 Long2ReferenceMap<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