org.jruby.util.collections

Class WeakValuedMap<Key,Value>

java.lang.Object

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

All Implemented Interfaces:

java.io.Serializable, java.util.Map<Key,Value>

Direct Known Subclasses:

WeakValuedIdentityMap

public class WeakValuedMap<Key,Value>
extends java.lang.Object
implements java.util.Map<Key,Value>, java.io.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 and Description
protected static class	WeakValuedMap.KeyedReference<Key,Value>

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

java.util.Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
WeakValuedMap()

Method Summary

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

Constructor Detail

WeakValuedMap

public WeakValuedMap()

Method Detail

put

public Value put(Key key,
                 Value value)

Specified by:

put in interface java.util.Map<Key,Value>

get

public Value get(java.lang.Object key)

Specified by:

get in interface java.util.Map<Key,Value>

clear

public void clear()

Specified by:

clear in interface java.util.Map<Key,Value>

size

public int size()

Specified by:

size in interface java.util.Map<Key,Value>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<Key,Value>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<Key,Value>

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<Key,Value>

remove

public Value remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<Key,Value>

putAll

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

Specified by:

putAll in interface java.util.Map<Key,Value>

keySet

public java.util.Set<Key> keySet()

Specified by:

keySet in interface java.util.Map<Key,Value>

values

public java.util.Collection<Value> values()

Specified by:

values in interface java.util.Map<Key,Value>

entrySet

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

Specified by:

entrySet in interface java.util.Map<Key,Value>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

newMap

protected java.util.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