org.exolab.castor.persist
public static class LRU.CountLimited extends LRU
Every object being put in the Map will live until the map is full. If the map is full, a least-recently-used object will be disposed.
Method dispose will be called whenever an old object is diposed. Developer can get notify by overriding the dispose method dispose.
Constructor Summary | |
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CountLimited(int size) |
Method Summary | |
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protected void | dispose(Object o)
This method is called when an object is disposed.
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Enumeration | elements()
Returns an enumeration of the values in this LRU map.
|
Object | get(Object key)
Returns the value to which the specified key is mapped in this Map. |
Object | put(Object key, Object object)
Maps the specified key to the specified
value in this Map. |
Object | remove(Object key)
Removes the key (and its corresponding value) from this
Map. |
Parameters: o - the disposed object
Returns: an enumeration of the values in this Map.
See Also: java.util.Enumeration
Parameters: key - a key in the Map.
Returns: the value to which the key is mapped in this Map; null if the key is not mapped to any value in this Map.
key
to the specified
value
in this Map. Neither the key nor the
value can be null
.
The value can be retrieved by calling the get
method
with a key that is equal to the original key, before it is diposed
when the Map is full.
Parameters: key the Map key. value the value.
Returns: the previous value of the specified key in this Map,
or null
if it did not have one.
Throws: NullPointerException if the key or value is
null
.
Parameters: key the key that needs to be removed.
Returns: the value to which the key had been mapped in this Map,
or null
if the key did not have a mapping.