it.unimi.dsi.fastutil.objects

Class Object2LongMaps.EmptyMap<K>

java.lang.Object

it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction<K>

it.unimi.dsi.fastutil.objects.Object2LongFunctions.EmptyFunction<K>

it.unimi.dsi.fastutil.objects.Object2LongMaps.EmptyMap<K>

All Implemented Interfaces:

Function<K,Long>, Object2LongFunction<K>, Object2LongMap<K>, Serializable, Cloneable, Map<K,Long>

Direct Known Subclasses:

Object2LongSortedMaps.EmptySortedMap

Enclosing class:

Object2LongMaps

public static class Object2LongMaps.EmptyMap<K>
extends Object2LongFunctions.EmptyFunction<K>
implements Object2LongMap<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.Object2LongMap

Object2LongMap.Entry<K>, Object2LongMap.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()
ObjectSet<K>	keySet() Returns a set view of the keys contained in this map.
ObjectSet<Object2LongMap.Entry<K>>	object2LongEntrySet() Returns a type-specific set view of the mappings contained in this map.
void	putAll(Map<? extends K,? extends Long> m)
String	toString()
LongCollection	values() Returns a set view of the values contained in this map.

Methods inherited from class it.unimi.dsi.fastutil.objects.Object2LongFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, getLong, size

Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction

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.Object2LongFunction

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 Object2LongMap<K>

See Also:

Map.containsValue(Object)

putAll

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

Specified by:

putAll in interface Map<K,Long>

object2LongEntrySet

public ObjectSet<Object2LongMap.Entry<K>> object2LongEntrySet()

Description copied from interface: Object2LongMap

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 Object2LongMap.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:

object2LongEntrySet in interface Object2LongMap<K>

Returns:

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

See Also:

Object2LongMap.entrySet()

keySet

public ObjectSet<K> keySet()

Description copied from interface: Object2LongMap

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 Object2LongMap<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: Object2LongMap

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 Object2LongMap<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 Object2LongFunctions.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: Object2LongMap

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 Object2LongMap<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