org.apache.openjpa.lib.util
Interface ReferenceMap

All Superinterfaces:

Map

All Known Implementing Classes:

ConcurrentReferenceHashMap, ReferenceHashMap

public interface ReferenceMap
extends Map

A Map type that can hold its keys, values, or both with weak or soft references.

Author:

Abe White

Nested Class Summary

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

Map.Entry<K,V>

Field Summary

static int	HARD
static int	SOFT
static int	WEAK

Method Summary

void	keyExpired(Object value) Overridable callback for when a key reference expires.
void	removeExpired() Purge stale entries.
void	valueExpired(Object key) Overridable callback for when a value reference expires.

Methods inherited from interface java.util.Map

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values

Field Detail

HARD

static final int HARD

See Also:

Constant Field Values

WEAK

static final int WEAK

See Also:

Constant Field Values

SOFT

static final int SOFT

See Also:

Constant Field Values

Method Detail

removeExpired

void removeExpired()

Purge stale entries.

keyExpired

void keyExpired(Object value)

Overridable callback for when a key reference expires.

Parameters:

value - the value for the expired key

valueExpired

void valueExpired(Object key)

Overridable callback for when a value reference expires.

Parameters:

key - the key for the expired value