jdbm.helper

Class SoftCache.Entry

java.lang.Object

java.lang.ref.Reference<T>

java.lang.ref.SoftReference

jdbm.helper.SoftCache.Entry

Enclosing class:

SoftCache

private static class SoftCache.Entry
extends java.lang.ref.SoftReference

Value objects we keep in the internal map. This contains the key in addition to the value, because polling for cleared references returns these instances, and having access to their corresponding keys drastically improves the performance of removing the pair from the map (see SoftCache.removeClearedEntries().)

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Object	key

Constructor Summary

Constructors

Constructor and Description
Entry(java.lang.Object key, java.lang.Object value, java.lang.ref.ReferenceQueue queue) Constructor that uses value as the soft reference's referent.

Method Summary

Modifier and Type	Method and Description
(package private) java.lang.Object	getKey() Gets the key
(package private) java.lang.Object	getValue() Gets the value

Methods inherited from class java.lang.ref.SoftReference

get

Methods inherited from class java.lang.ref.Reference

clear, enqueue, isEnqueued

Methods inherited from class java.lang.Object

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

Field Detail

key

private final java.lang.Object key

Constructor Detail

Entry

public Entry(java.lang.Object key,
             java.lang.Object value,
             java.lang.ref.ReferenceQueue queue)

Constructor that uses value as the soft reference's referent.

Method Detail

getKey

final java.lang.Object getKey()

Gets the key

Returns:

the key associated with this value.

getValue

final java.lang.Object getValue()

Gets the value

Returns:

the value; null if it is no longer accessible