org.apache.avalon.excalibur.cache
Class DefaultCache

java.lang.Object
  |
  +--org.apache.avalon.excalibur.cache.AbstractCache
        |
        +--org.apache.avalon.excalibur.cache.DefaultCache

All Implemented Interfaces:

Cache, org.apache.avalon.framework.component.Component

Direct Known Subclasses:

LRUCache, TimeMapLRUCache

public class DefaultCache

extends AbstractCache

Default Cache implementation.

Author:

Eung-ju Park

Fields inherited from class org.apache.avalon.excalibur.cache.AbstractCache

m_listeners

Constructor Summary

DefaultCache(ReplacementPolicy policy, CacheStore store)

Method Summary

int	capacity() Return capacity of cache.
void	clear() Clear cache.
boolean	containsKey(java.lang.Object key)
java.lang.Object	get(java.lang.Object key) Get an item from the cache.
java.lang.Object	put(java.lang.Object key, java.lang.Object value) Puts a new item in the cache.
java.lang.Object	remove(java.lang.Object key) Removes an item from the cache.
int	size() Return size of cache.

Methods inherited from class org.apache.avalon.excalibur.cache.AbstractCache

addListener, notifyAdded, notifyRemoved, removeListener

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultCache

public DefaultCache(ReplacementPolicy policy,
                    CacheStore store)

Method Detail

capacity

public int capacity()

Description copied from interface: Cache

Return capacity of cache.

Following copied from interface: org.apache.avalon.excalibur.cache.Cache

Returns:

capacity of cache

size

public int size()

Description copied from interface: Cache

Return size of cache.

Following copied from interface: org.apache.avalon.excalibur.cache.Cache

Returns:

the number of key-value mappings in this cache.

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Description copied from interface: Cache

Puts a new item in the cache. If the cache is full, remove the selected item.

Following copied from interface: org.apache.avalon.excalibur.cache.Cache

Parameters:

key - key for the item

value - item

Returns:

old value. null if old value not exists.

get

public java.lang.Object get(java.lang.Object key)

Description copied from interface: Cache

Get an item from the cache.

Following copied from interface: org.apache.avalon.excalibur.cache.Cache

Parameters:

key - key to lookup the item

Returns:

the matching object in the cache. null if item not exists.

remove

public java.lang.Object remove(java.lang.Object key)

Description copied from interface: Cache

Removes an item from the cache.

Following copied from interface: org.apache.avalon.excalibur.cache.Cache

Parameters:

key - key to remove

Returns:

the value removed. null if old value not exists.

containsKey

public boolean containsKey(java.lang.Object key)

Following copied from interface: org.apache.avalon.excalibur.cache.Cache

Parameters:

key -

Returns:

true if matching item in the cache

clear

public void clear()

Description copied from interface: Cache

Clear cache.