Package 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, Function<Long,V>, LongFunction<V>, 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

Modifier and Type	Method	Description
Object	clone()
boolean	containsValue(Object v)
boolean	equals(Object o)
void	forEach(BiConsumer<? super Long,? super V> consumer)
V	getOrDefault(long key, V defaultValue)	Returns the value associated by this function to the specified key, or give the specified value if not present.
V	getOrDefault(Object key, V defaultValue)	Deprecated.
int	hashCode()
boolean	isEmpty()
LongSet	keySet()
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()

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

clear, containsKey, defaultReturnValue, defaultReturnValue, get, size

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

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

apply

Methods inherited from interface java.util.function.Function

andThen

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2ReferenceFunction

andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, apply, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, remove

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2ReferenceMap

clear, compute, computeIfAbsent, computeIfAbsent, computeIfAbsentPartial, computeIfPresent, containsKey, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, merge, put, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, merge, putIfAbsent, remove, replace, replace, replaceAll

Method Details

containsValue

public boolean containsValue(Object v)

Specified by:

containsValue in interface Map<Long,V>

getOrDefault

@Deprecated
public V getOrDefault(Object key,
 V defaultValue)

Deprecated.

Description copied from interface: Long2ReferenceMap

Returns the value associated by this function to the specified key, or give the specified value if not present.

This default implementation just delegates to the corresponding Map method.

Specified by:

getOrDefault in interface Function<Long,V>

Specified by:

getOrDefault in interface Long2ReferenceFunction<V>

Specified by:

getOrDefault in interface Long2ReferenceMap<V>

Specified by:

getOrDefault in interface Map<Long,V>

Parameters:

key - the key.

defaultValue - the default value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Map.getOrDefault(Object, Object)

getOrDefault

public V getOrDefault(long key,
 V defaultValue)

Description copied from interface: Long2ReferenceFunction

Returns the value associated by this function to the specified key, or give the specified value if not present.

Specified by:

getOrDefault in interface Long2ReferenceFunction<V>

Specified by:

getOrDefault in interface Long2ReferenceMap<V>

Overrides:

getOrDefault in class Long2ReferenceFunctions.EmptyFunction<V>

Parameters:

key - the key.

defaultValue - the value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Function.getOrDefault(Object, Object)

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 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:

long2ReferenceEntrySet in interface Long2ReferenceMap<V>

Returns:

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

See Also:

• Map.entrySet()

keySet

public LongSet keySet()

Description copied from interface: Long2ReferenceMap

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

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()

forEach

public void forEach(BiConsumer<? super Long,? super V> consumer)

Specified by:

forEach in interface Long2ReferenceMap<V>

Specified by:

forEach in interface Map<Long,V>

clone

public Object clone()

Overrides:

clone in class Long2ReferenceFunctions.EmptyFunction<V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Long,V>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Long,V>

Overrides:

hashCode in class Long2ReferenceFunctions.EmptyFunction<V>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Long,V>

Overrides:

equals in class Long2ReferenceFunctions.EmptyFunction<V>

toString

public String toString()

Overrides:

toString in class Long2ReferenceFunctions.EmptyFunction<V>