org.apache.hadoop.hbase.util
Class SoftValueMap<K,V>

java.lang.Object
  extended by org.apache.hadoop.hbase.util.SoftValueMap<K,V>
Type Parameters:
K - key class
V - value class
All Implemented Interfaces:
Map<K,V>

public class SoftValueMap<K,V>
extends Object
implements Map<K,V>

A Map that uses Soft Reference values internally. Use as a simple cache.


Nested Class Summary
 
Nested classes/interfaces inherited from interface java.util.Map
Map.Entry<K,V>
 
Constructor Summary
SoftValueMap()
           
SoftValueMap(ReferenceQueue<?> rq)
           
 
Method Summary
 int checkReferences()
          Checks soft references and cleans any that have been placed on ReferenceQueue.
 void clear()
           
 boolean containsKey(Object key)
           
 boolean containsValue(Object value)
           
 Set<Map.Entry<K,V>> entrySet()
           
 V get(Object key)
           
 boolean isEmpty()
           
 Set<K> keySet()
           
 V put(K key, V value)
           
 void putAll(Map map)
           
 V remove(Object key)
           
 int size()
           
 Collection<V> 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
 

Constructor Detail

SoftValueMap

public SoftValueMap()

SoftValueMap

public SoftValueMap(ReferenceQueue<?> rq)
Method Detail

checkReferences

public int checkReferences()
Checks soft references and cleans any that have been placed on ReferenceQueue.

Returns:
How many references cleared.

put

public V put(K key,
             V value)
Specified by:
put in interface Map<K,V>

putAll

public void putAll(Map map)
Specified by:
putAll in interface Map<K,V>

get

public V get(Object key)
Specified by:
get in interface Map<K,V>

remove

public V remove(Object key)
Specified by:
remove in interface Map<K,V>

containsKey

public boolean containsKey(Object key)
Specified by:
containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)
Specified by:
containsValue in interface Map<K,V>

isEmpty

public boolean isEmpty()
Specified by:
isEmpty in interface Map<K,V>

size

public int size()
Specified by:
size in interface Map<K,V>

clear

public void clear()
Specified by:
clear in interface Map<K,V>

keySet

public Set<K> keySet()
Specified by:
keySet in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()
Specified by:
entrySet in interface Map<K,V>

values

public Collection<V> values()
Specified by:
values in interface Map<K,V>


Copyright © 2010 Apache Software Foundation. All Rights Reserved.