de.netseeker.ejoe.cache
Class LRUMap

java.lang.Object
  de.netseeker.ejoe.cache.LRUMap

All Implemented Interfaces:

java.util.Map

public class LRUMap
extends java.lang.Object
implements java.util.Map

Simple synchronized implementation of a least recently used cache (LRU). This class implements the Map interface hence it can be used easily as replacement for Collections.synchronizedMap(new HashMap()).

Since:

0.3.9.1

Author:

netseeker

Nested Class Summary

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

java.util.Map.Entry<K,V>

Field Summary

static int

MAX_ENTRIES

Constructor Summary

LRUMap()
Creates a new LRUMap

LRUMap(int maxEntries)
Creates a new LRUMap

Method Summary

void	clear()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set	entrySet()
java.lang.Object	get(java.lang.Object obj)
boolean	isEmpty()
java.util.Set	keySet()
java.lang.Object	put(java.lang.Object key, java.lang.Object value)
void	putAll(java.util.Map map)
java.lang.Object	remove(java.lang.Object key)
int	size()
java.util.Collection	values()

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

equals, hashCode

Field Detail

MAX_ENTRIES

public static final int MAX_ENTRIES

See Also:

Constant Field Values

Constructor Detail

LRUMap

public LRUMap()

Creates a new LRUMap

LRUMap

public LRUMap(int maxEntries)

Creates a new LRUMap

Parameters:

maxEntries - max size of the cache

Method Detail

size

public int size()

Specified by:

size in interface java.util.Map

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map

get

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

Specified by:

get in interface java.util.Map

put

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

Specified by:

put in interface java.util.Map

remove

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

Specified by:

remove in interface java.util.Map

putAll

public void putAll(java.util.Map map)

Specified by:

putAll in interface java.util.Map

clear

public void clear()

Specified by:

clear in interface java.util.Map

keySet

public java.util.Set keySet()

Specified by:

keySet in interface java.util.Map

values

public java.util.Collection values()

Specified by:

values in interface java.util.Map

entrySet

public java.util.Set entrySet()

Specified by:

entrySet in interface java.util.Map