it.unimi.dsi.fastutil.objects

Class Reference2ReferenceSortedMaps.EmptySortedMap<K,V>

java.lang.Object

it.unimi.dsi.fastutil.objects.AbstractReference2ReferenceFunction<K,V>

it.unimi.dsi.fastutil.objects.Reference2ReferenceFunctions.EmptyFunction<K,V>

it.unimi.dsi.fastutil.objects.Reference2ReferenceMaps.EmptyMap<K,V>

it.unimi.dsi.fastutil.objects.Reference2ReferenceSortedMaps.EmptySortedMap<K,V>

All Implemented Interfaces:

Reference2ReferenceFunction<K,V>, Reference2ReferenceMap<K,V>, Reference2ReferenceSortedMap<K,V>, Serializable, Cloneable, Function<K,V>, Map<K,V>, SortedMap<K,V>

Enclosing class:

Reference2ReferenceSortedMaps

public static class Reference2ReferenceSortedMaps.EmptySortedMap<K,V>
extends Reference2ReferenceMaps.EmptyMap<K,V>
implements Reference2ReferenceSortedMap<K,V>, Serializable, Cloneable

An immutable class representing an empty type-specific sorted map.

This class may be useful to implement your own in case you subclass a type-specific sorted map.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Reference2ReferenceSortedMap

Reference2ReferenceSortedMap.FastSortedEntrySet<K,V>

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Reference2ReferenceMap

Reference2ReferenceMap.Entry<K,V>, Reference2ReferenceMap.FastEntrySet<K,V>

Method Summary

Modifier and Type	Method and Description
Comparator<? super K>	comparator() Returns the comparator associated with this sorted set, or null if it uses its keys' natural ordering.
ObjectSortedSet<Map.Entry<K,V>>	entrySet() Returns a sorted-set view of the mappings contained in this map.
K	firstKey()
Reference2ReferenceSortedMap<K,V>	headMap(K to) Returns a view of the portion of this sorted map whose keys are strictly less than toKey.
ReferenceSortedSet<K>	keySet() Note that this specification strengthens the one given in Map.keySet().
K	lastKey()
ObjectSortedSet<Reference2ReferenceMap.Entry<K,V>>	reference2ReferenceEntrySet() Returns a type-specific set view of the mappings contained in this map.
Reference2ReferenceSortedMap<K,V>	subMap(K from, K to) Returns a view of the portion of this sorted map whose keys range from fromKey, inclusive, to toKey, exclusive.
Reference2ReferenceSortedMap<K,V>	tailMap(K from) Returns a view of the portion of this sorted map whose keys are greater than or equal to fromKey.

Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2ReferenceMaps.EmptyMap

clone, containsValue, equals, hashCode, isEmpty, putAll, toString, values

Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2ReferenceFunctions.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.objects.Reference2ReferenceSortedMap

values

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2ReferenceMap

clear, containsKey, defaultReturnValue, defaultReturnValue, put, remove, size

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2ReferenceFunction

get

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, containsValue, equals, forEach, get, getOrDefault, hashCode, isEmpty, merge, putAll, putIfAbsent, remove, replace, replace, replaceAll

Method Detail

comparator

public Comparator<? super K> comparator()

Description copied from interface: Reference2ReferenceSortedMap

Returns the comparator associated with this sorted set, or null if it uses its keys' natural ordering.

Note that this specification strengthens the one given in SortedMap.comparator().

Specified by:

comparator in interface Reference2ReferenceSortedMap<K,V>

Specified by:

comparator in interface SortedMap<K,V>

See Also:

SortedMap.comparator()

reference2ReferenceEntrySet

public ObjectSortedSet<Reference2ReferenceMap.Entry<K,V>> reference2ReferenceEntrySet()

Description copied from interface: Reference2ReferenceMap

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:

reference2ReferenceEntrySet in interface Reference2ReferenceMap<K,V>

Specified by:

reference2ReferenceEntrySet in interface Reference2ReferenceSortedMap<K,V>

Overrides:

reference2ReferenceEntrySet in class Reference2ReferenceMaps.EmptyMap<K,V>

Returns:

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

See Also:

Map.entrySet()

entrySet

public ObjectSortedSet<Map.Entry<K,V>> entrySet()

Returns a sorted-set view of the mappings contained in this map.

Note that this specification strengthens the one given in the corresponding type-specific unsorted map.

Specified by:

entrySet in interface Reference2ReferenceMap<K,V>

Specified by:

entrySet in interface Reference2ReferenceSortedMap<K,V>

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in interface SortedMap<K,V>

Returns:

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

See Also:

Map.entrySet()

keySet

public ReferenceSortedSet<K> keySet()

Description copied from interface: Reference2ReferenceMap

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

Specified by:

keySet in interface Reference2ReferenceMap<K,V>

Specified by:

keySet in interface Reference2ReferenceSortedMap<K,V>

Specified by:

keySet in interface Map<K,V>

Specified by:

keySet in interface SortedMap<K,V>

Overrides:

keySet in class Reference2ReferenceMaps.EmptyMap<K,V>

Returns:

a set view of the keys contained in this map.

See Also:

Map.keySet()

subMap

public Reference2ReferenceSortedMap<K,V> subMap(K from,
                                                K to)

Description copied from interface: Reference2ReferenceSortedMap

Returns a view of the portion of this sorted map whose keys range from fromKey, inclusive, to toKey, exclusive.

Note that this specification strengthens the one given in SortedMap.subMap(Object,Object).

Specified by:

subMap in interface Reference2ReferenceSortedMap<K,V>

Specified by:

subMap in interface SortedMap<K,V>

See Also:

SortedMap.subMap(Object,Object)

headMap

public Reference2ReferenceSortedMap<K,V> headMap(K to)

Description copied from interface: Reference2ReferenceSortedMap

Returns a view of the portion of this sorted map whose keys are strictly less than toKey.

Note that this specification strengthens the one given in SortedMap.headMap(Object).

Specified by:

headMap in interface Reference2ReferenceSortedMap<K,V>

Specified by:

headMap in interface SortedMap<K,V>

See Also:

SortedMap.headMap(Object)

tailMap

public Reference2ReferenceSortedMap<K,V> tailMap(K from)

Description copied from interface: Reference2ReferenceSortedMap

Returns a view of the portion of this sorted map whose keys are greater than or equal to fromKey.

Note that this specification strengthens the one given in SortedMap.tailMap(Object).

Specified by:

tailMap in interface Reference2ReferenceSortedMap<K,V>

Specified by:

tailMap in interface SortedMap<K,V>

See Also:

SortedMap.tailMap(Object)

firstKey

public K firstKey()

Specified by:

firstKey in interface SortedMap<K,V>

lastKey

public K lastKey()

Specified by:

lastKey in interface SortedMap<K,V>