org.jboss.util.collection

Class ConcurrentReferenceHashMap.HashEntry<K,V>

java.lang.Object

org.jboss.util.collection.ConcurrentReferenceHashMap.HashEntry<K,V>

Enclosing class:

ConcurrentReferenceHashMap<K,V>

static final class ConcurrentReferenceHashMap.HashEntry<K,V>
extends java.lang.Object

ConcurrentReferenceHashMap list entry. Note that this is never exported out as a user-visible Map.Entry. Because the value field is volatile, not final, it is legal wrt the Java Memory Model for an unsynchronized reader to see null instead of initial value when read via a data race. Although a reordering leading to this is not likely to ever actually occur, the Segment.readValueUnderLock method is used as a backup in case a null (pre-initialized) value is ever seen in an unsynchronized access method.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	hash
(package private) java.lang.Object	keyRef
(package private) ConcurrentReferenceHashMap.HashEntry<K,V>	next
(package private) java.lang.Object	valueRef

Constructor Summary

Constructors

Constructor and Description
HashEntry(K key, int hash, ConcurrentReferenceHashMap.HashEntry<K,V> next, V value, ConcurrentReferenceHashMap.ReferenceType keyType, ConcurrentReferenceHashMap.ReferenceType valueType, java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)

Method Summary

Modifier and Type	Method and Description
(package private) V	dereferenceValue(java.lang.Object value)
(package private) K	key()
(package private) static <K,V> ConcurrentReferenceHashMap.HashEntry<K,V>[]	newArray(int i)
(package private) java.lang.Object	newKeyReference(K key, ConcurrentReferenceHashMap.ReferenceType keyType, java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)
(package private) java.lang.Object	newValueReference(V value, ConcurrentReferenceHashMap.ReferenceType valueType, java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)
(package private) void	setValue(V value, ConcurrentReferenceHashMap.ReferenceType valueType, java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)
(package private) V	value()

Methods inherited from class java.lang.Object

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

Field Detail

keyRef

final java.lang.Object keyRef

hash

final int hash

valueRef

volatile java.lang.Object valueRef

next

final ConcurrentReferenceHashMap.HashEntry<K,V> next

Constructor Detail

HashEntry

HashEntry(K key,
          int hash,
          ConcurrentReferenceHashMap.HashEntry<K,V> next,
          V value,
          ConcurrentReferenceHashMap.ReferenceType keyType,
          ConcurrentReferenceHashMap.ReferenceType valueType,
          java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)

Method Detail

newKeyReference

final java.lang.Object newKeyReference(K key,
                                       ConcurrentReferenceHashMap.ReferenceType keyType,
                                       java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)

newValueReference

final java.lang.Object newValueReference(V value,
                                         ConcurrentReferenceHashMap.ReferenceType valueType,
                                         java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)

key

final K key()

value

final V value()

dereferenceValue

final V dereferenceValue(java.lang.Object value)

setValue

final void setValue(V value,
                    ConcurrentReferenceHashMap.ReferenceType valueType,
                    java.lang.ref.ReferenceQueue<java.lang.Object> refQueue)

newArray

static final <K,V> ConcurrentReferenceHashMap.HashEntry<K,V>[] newArray(int i)