org.apache.cxf.common.util
Class CacheMap<K,V>

java.lang.Object
  org.apache.cxf.common.util.CacheMap<K,V>

All Implemented Interfaces:

Map<K,V>

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

Implements a useful caching map. It weakly references the keys, but strongly references the data. It works much like the WeakHashMap, in that when the keys are garbage collected, the data is removed from the map. The main difference is that keys used for lookups don't have to be "==" the same to maintain the data in the cache. Basically, lookups in this map use a ".equals" compare, but the keys are then stored with a "==" compare so if the original key is garbage collected, the other keys that may reference the data keep the data in the cache. Note that this implementation is not synchronized. Not even a little. 'Read-only' operations can trigger internal modifications. If you share this class between threads, you must protect every operation.

CacheMap

public CacheMap()

clear

public void clear()

Specified by:

clear 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>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

putAll

public void putAll(Map<? extends K,? extends V> t)

Specified by:

putAll in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

toString

public String toString()

Overrides:

toString in class Object