Class WeakMap

java.lang.Object

com.oracle.truffle.js.runtime.util.WeakMap

All Implemented Interfaces:

Map<Object,Object>

public final class WeakMap
extends Object
implements Map<Object,Object>

JavaScript WeakMap that emulates ephemeron semantics by storing the value in the key itself (i.e., in a hidden property within the key object).

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
static final com.oracle.truffle.api.object.HiddenKey	INVERTED_WEAK_MAP_KEY

Constructor Summary

Constructors

Constructor	Description
WeakMap()

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<Object,Object>>	entrySet()
Object	get(Object key)
boolean	isEmpty()
Set<Object>	keySet()
static Map<WeakMap,Object>	newInvertedMap()
Map<WeakMap,Object>	newInvertedMapWithEntry(Object key, Object value)
Object	put(Object key, Object value)
void	putAll(Map<? extends Object, ? extends Object> m)
Object	remove(Object key)
int	size()
Collection<Object>	values()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Field Details

INVERTED_WEAK_MAP_KEY

public static final com.oracle.truffle.api.object.HiddenKey INVERTED_WEAK_MAP_KEY

Constructor Details

WeakMap

public WeakMap()

Method Details

newInvertedMap

public static Map<WeakMap,Object> newInvertedMap()

newInvertedMapWithEntry

public Map<WeakMap,Object> newInvertedMapWithEntry(Object key,
 Object value)

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<Object,Object>

get

public Object get(Object key)

Specified by:

get in interface Map<Object,Object>

put

public Object put(Object key,
 Object value)

Specified by:

put in interface Map<Object,Object>

remove

public Object remove(Object key)

Specified by:

remove in interface Map<Object,Object>

putAll

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

Specified by:

putAll in interface Map<Object,Object>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<Object,Object>

size

public int size()

Specified by:

size in interface Map<Object,Object>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Object,Object>

clear

public void clear()

Specified by:

clear in interface Map<Object,Object>

keySet

public Set<Object> keySet()

Specified by:

keySet in interface Map<Object,Object>

values

public Collection<Object> values()

Specified by:

values in interface Map<Object,Object>

entrySet

public Set<Map.Entry<Object,Object>> entrySet()

Specified by:

entrySet in interface Map<Object,Object>