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:

Object2LongFunction<K>, Object2LongMap<K>, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<K,java.lang.Long>, java.util.function.ToLongFunction<K>, java.util.Map<K,java.lang.Long>

Direct Known Subclasses:

Object2LongSortedMaps.EmptySortedMap

Enclosing class:

Object2LongMaps

public static class Object2LongMaps.EmptyMap<K>
extends Object2LongFunctions.EmptyFunction<K>
implements Object2LongMap<K>, java.io.Serializable, java.lang.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
java.lang.Object	clone()
boolean	containsValue(long v) Returns true if this map maps one or more keys to the specified value.
boolean	containsValue(java.lang.Object ov) Deprecated. Please use the corresponding type-specific method instead.
boolean	equals(java.lang.Object o)
int	hashCode()
boolean	isEmpty()
ObjectSet<K>	keySet() Note that this specification strengthens the one given in Map.keySet().
ObjectSet<Object2LongMap.Entry<K>>	object2LongEntrySet() Returns a type-specific set view of the mappings contained in this map.
void	putAll(java.util.Map<? extends K,? extends java.lang.Long> m)
java.lang.String	toString()
LongCollection	values() Note that this specification strengthens the one given in Map.values().

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

clear, containsKey, defaultReturnValue, defaultReturnValue, getLong, size

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2LongMap

clear, computeLong, computeLongIfAbsent, computeLongIfAbsentPartial, computeLongIfPresent, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, mergeLong, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2LongFunction

applyAsLong, getLong, put, removeLong

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

apply

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, replaceAll

Method Detail

containsValue

public boolean containsValue(long v)

Description copied from interface: Object2LongMap

Returns true if this map maps one or more keys to the specified value.

Specified by:

containsValue in interface Object2LongMap<K>

See Also:

Map.containsValue(Object)

containsValue

@Deprecated
public boolean containsValue(java.lang.Object ov)

Deprecated. Please use the corresponding type-specific method instead.

Specified by:

containsValue in interface Object2LongMap<K>

Specified by:

containsValue in interface java.util.Map<K,java.lang.Long>

putAll

public void putAll(java.util.Map<? extends K,? extends java.lang.Long> m)

Specified by:

putAll in interface java.util.Map<K,java.lang.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 Map.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:

object2LongEntrySet in interface Object2LongMap<K>

Returns:

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

See Also:

Map.entrySet()

keySet

public ObjectSet<K> keySet()

Description copied from interface: Object2LongMap

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

Specified by:

keySet in interface Object2LongMap<K>

Specified by:

keySet in interface java.util.Map<K,java.lang.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

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

Specified by:

values in interface Object2LongMap<K>

Specified by:

values in interface java.util.Map<K,java.lang.Long>

Returns:

a set view of the values contained in this map.

See Also:

Map.values()

clone

public java.lang.Object clone()

Overrides:

clone in class Object2LongFunctions.EmptyFunction<K>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,java.lang.Long>

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Map<K,java.lang.Long>

Overrides:

hashCode in class Object2LongFunctions.EmptyFunction<K>

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Map<K,java.lang.Long>

Overrides:

equals in class Object2LongFunctions.EmptyFunction<K>

toString

public java.lang.String toString()

Overrides:

toString in class Object2LongFunctions.EmptyFunction<K>