Module io.sf.jclf.util

Package io.sf.jclf.util

Class CacheMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

io.sf.jclf.util.CacheMap<K,V>

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class CacheMap<K,V>
extends HashMap<K,V>

A HashMap-based cache with an expiration method

Note that there are better ways to achieve expirations in modern JDKs.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

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

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
protected HashMap<Object,Long>	lastacc
protected long	t

Constructor Summary

Constructors

Constructor	Description
CacheMap()
CacheMap(int initialCapacity)
CacheMap(int initialCapacity, float loadFactor)

Method Summary

Modifier and Type	Method	Description
void	clear()
Object	clone()
boolean	containsKey(Object key)
void	expire(int exptime)
V	get(Object key)
V	put(K key, V value)
V	remove(Object key)

Methods inherited from class java.util.HashMap

compute, computeIfAbsent, computeIfPresent, containsValue, entrySet, forEach, getOrDefault, isEmpty, keySet, merge, putAll, putIfAbsent, remove, replace, replace, replaceAll, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Field Details

lastacc

protected HashMap<Object,Long> lastacc

t

protected long t

Constructor Details

CacheMap

public CacheMap()

CacheMap

public CacheMap(int initialCapacity)

CacheMap

public CacheMap(int initialCapacity,
 float loadFactor)

Method Details

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class HashMap<K,V>

clone

public Object clone()

Overrides:

clone in class HashMap<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

Overrides:

containsKey in class HashMap<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class HashMap<K,V>

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class HashMap<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class HashMap<K,V>

expire

public void expire(int exptime)