org.graalvm.collections

Interface UnmodifiableEconomicMap<K,V>

All Known Subinterfaces:

EconomicMap<K,V>

All Known Implementing Classes:

EconomicMapWrap

public interface UnmodifiableEconomicMap<K,V>

Unmodifiable memory efficient map. See EconomicMap for the underlying data structure and its properties.

Since:

19.0

Method Summary

Modifier and Type	Method and Description
boolean	containsKey(K key) Returns true if this map contains a mapping for key.
V	get(K key) Returns the value to which key is mapped, or null if this map contains no mapping for key.
default V	get(K key, V defaultValue) Returns the value to which key is mapped, or defaultValue if this map contains no mapping for key.
UnmodifiableMapCursor<K,V>	getEntries() Returns a UnmodifiableMapCursor view of the mappings contained in this map.
Iterable<K>	getKeys() Returns a Iterable view of the keys contained in this map.
Iterable<V>	getValues() Returns a Iterable view of the values contained in this map.
boolean	isEmpty() Returns true if this map contains no key-value mappings.
int	size() Returns the number of key-value mappings in this map.

Method Detail

get

V get(K key)

Returns the value to which key is mapped, or null if this map contains no mapping for key. The key must not be null.

Since:

19.0

get

default V get(K key,
              V defaultValue)

Returns the value to which key is mapped, or defaultValue if this map contains no mapping for key. The key must not be null.

Since:

19.0

containsKey

boolean containsKey(K key)

Returns true if this map contains a mapping for key. Returns always false if the key is null.

Since:

19.0

size

int size()

Returns the number of key-value mappings in this map.

Since:

19.0

isEmpty

boolean isEmpty()

Returns true if this map contains no key-value mappings.

Since:

19.0

getValues

Iterable<V> getValues()

Returns a Iterable view of the values contained in this map.

Since:

19.0

getKeys

Iterable<K> getKeys()

Returns a Iterable view of the keys contained in this map.

Since:

19.0

getEntries

UnmodifiableMapCursor<K,V> getEntries()

Returns a UnmodifiableMapCursor view of the mappings contained in this map.

Since:

19.0