org.apache.openjpa.lib.util
Class ReferenceHashMap

java.lang.Object
  org.apache.commons.collections.map.ReferenceMap
      org.apache.openjpa.lib.util.ReferenceHashMap

All Implemented Interfaces:

Map, ReferenceMap, SizedMap

public class ReferenceHashMap
extends ReferenceMap
implements ReferenceMap, SizedMap

Map in which the key, value, or both may be weak/soft references.

Since:

0.4.0

Author:

Abe White

Nested Class Summary

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

Map.Entry<K,V>

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

Map.Entry<K,V>

Field Summary

Fields inherited from interface org.apache.openjpa.lib.util.ReferenceMap

HARD, SOFT, WEAK

Constructor Summary

ReferenceHashMap(int keyType, int valueType)

ReferenceHashMap(int keyType, int valueType, int capacity, float loadFactor)

Method Summary

protected void	addMapping(int hashIndex, int hashCode, Object key, Object value)
protected HashEntry	createEntry(HashEntry next, int hashCode, Object key, Object value)
protected void	doReadObject(ObjectInputStream in)
protected void	doWriteObject(ObjectOutputStream out)
int	getMaxSize() The maximum number of entries, or Integer.MAX_VALUE for no limit.
boolean	isFull() Whether the map is full.
void	keyExpired(Object value) Overridable callback for when a key reference expires.
void	overflowRemoved(Object key, Object value) Overridable callback for when an overflow entry is automatically removed.
protected void	purge(Reference ref)
void	removeExpired() Purge stale entries.
void	setMaxSize(int maxSize) The maximum number of entries, or Integer.MAX_VALUE for no limit.
void	valueExpired(Object key) Overridable callback for when a value reference expires.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

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

Methods inherited from interface java.util.Map

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

Constructor Detail

ReferenceHashMap

public ReferenceHashMap(int keyType,
                        int valueType)

ReferenceHashMap

public ReferenceHashMap(int keyType,
                        int valueType,
                        int capacity,
                        float loadFactor)

Method Detail

getMaxSize

public int getMaxSize()

Description copied from interface: SizedMap

The maximum number of entries, or Integer.MAX_VALUE for no limit.

Specified by:

getMaxSize in interface SizedMap

setMaxSize

public void setMaxSize(int maxSize)

Description copied from interface: SizedMap

The maximum number of entries, or Integer.MAX_VALUE for no limit.

Specified by:

setMaxSize in interface SizedMap

isFull

public boolean isFull()

Description copied from interface: SizedMap

Whether the map is full.

Specified by:

isFull in interface SizedMap

overflowRemoved

public void overflowRemoved(Object key,
                            Object value)

Description copied from interface: SizedMap

Overridable callback for when an overflow entry is automatically removed.

Specified by:

overflowRemoved in interface SizedMap

valueExpired

public void valueExpired(Object key)

Description copied from interface: ReferenceMap

Overridable callback for when a value reference expires.

Specified by:

valueExpired in interface ReferenceMap

Parameters:

key - the key for the expired value

keyExpired

public void keyExpired(Object value)

Description copied from interface: ReferenceMap

Overridable callback for when a key reference expires.

Specified by:

keyExpired in interface ReferenceMap

Parameters:

value - the value for the expired key

removeExpired

public void removeExpired()

Description copied from interface: ReferenceMap

Purge stale entries.

Specified by:

removeExpired in interface ReferenceMap

addMapping

protected void addMapping(int hashIndex,
                          int hashCode,
                          Object key,
                          Object value)

createEntry

protected HashEntry createEntry(HashEntry next,
                                int hashCode,
                                Object key,
                                Object value)

purge

protected void purge(Reference ref)

doWriteObject

protected void doWriteObject(ObjectOutputStream out)
                      throws IOException

Throws:

IOException

doReadObject

protected void doReadObject(ObjectInputStream in)
                     throws ClassNotFoundException,
                            IOException

Throws:

ClassNotFoundException

IOException