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.
| Nested classes/interfaces inherited from interface java.util.Map |
Map.Entry<K,V> |
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
Apache CXF