Package org.jruby.util.collections

Class WeakValuedMap<Key,Value>

java.lang.Object

org.jruby.util.collections.WeakValuedMap<Key,Value>

All Implemented Interfaces:

Serializable, Map<Key,Value>

Direct Known Subclasses:

WeakValuedIdentityMap

public class WeakValuedMap<Key,Value>
extends Object
implements Map<Key,Value>, Serializable

Map-like that holds its values weakly (backed by a concurrent hash map).

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	WeakValuedMap.EntrySet
protected static class	WeakValuedMap.KeyedReference<Key,Value>

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

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
private final ReferenceQueue<Value>	deadRefs
private final Map<Key,WeakValuedMap.KeyedReference<Key,Value>>	map

Constructor Summary

Constructors

Constructor	Description
WeakValuedMap()

Method Summary

Modifier and Type	Method	Description
private void	cleanReferences()
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<Key,Value>>	entrySet()
Value	get(Object key)
boolean	isEmpty()
Set<Key>	keySet()
protected Map<Key,WeakValuedMap.KeyedReference<Key,Value>>	newMap()	Construct the backing store map for this WeakValuedMap.
Value	put(Key key, Value value)
void	putAll(Map<? extends Key,? extends Value> m)
Value	remove(Object key)
int	size()
String	toString()
Collection<Value>	values()

Methods inherited from class java.lang.Object

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

map

private final Map<Key,WeakValuedMap.KeyedReference<Key,Value>> map

deadRefs

private final ReferenceQueue<Value> deadRefs

Constructor Details

WeakValuedMap

public WeakValuedMap()

Method Details

put

public Value put(Key key,
 Value value)

Specified by:

put in interface Map<Key,Value>

get

public Value get(Object key)

Specified by:

get in interface Map<Key,Value>

clear

public void clear()

Specified by:

clear in interface Map<Key,Value>

size

public int size()

Specified by:

size in interface Map<Key,Value>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Key,Value>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<Key,Value>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<Key,Value>

remove

public Value remove(Object key)

Specified by:

remove in interface Map<Key,Value>

putAll

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

Specified by:

putAll in interface Map<Key,Value>

keySet

public Set<Key> keySet()

Specified by:

keySet in interface Map<Key,Value>

values

public Collection<Value> values()

Specified by:

values in interface Map<Key,Value>

entrySet

public Set<Map.Entry<Key,Value>> entrySet()

Specified by:

entrySet in interface Map<Key,Value>

toString

public String toString()

Overrides:

toString in class Object

newMap

protected Map<Key,WeakValuedMap.KeyedReference<Key,Value>> newMap()

Construct the backing store map for this WeakValuedMap. It should be capable of safe concurrent read and write.

Returns:

the backing store map

cleanReferences

private void cleanReferences()