org.jacorb.notification.util
Class CachingWildcardMap
java.lang.Object
org.jacorb.notification.util.WildcardMap
org.jacorb.notification.util.CachingWildcardMap
public class CachingWildcardMap
- extends WildcardMap
Add Caching to WildcardMap. If the Keys inside the Map contain the
Wildcard Operator '*' the Operation getWithExpansion is rather expensive.
For each Key that contains a '*' a pattern match must be done. This
Subclass adds simple Caching. When a key is looked up the retrieved
value is stored in an internal cache with fixed size. Subsequent
getWithExpansion Operations query the cache first. As soon as a put
or remove Operation occurs the Cache is invalidated.
- Version:
- $Id: CachingWildcardMap.java,v 1.4 2004/05/06 12:40:00 nicolas Exp $
- Author:
- Alphonse Bendt
Method Summary |
java.lang.Object[] |
getWithExpansion(java.lang.Object key)
Returns the value to which this map maps the specified
key. |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value)
The operation put associates the specified value
with the specified key in this map. |
java.lang.Object |
remove(java.lang.Object key)
remove the specified key from this Map. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
CachingWildcardMap
public CachingWildcardMap(int cacheSize)
remove
public java.lang.Object remove(java.lang.Object key)
- Description copied from class:
WildcardMap
- remove the specified key from this Map.
- Overrides:
remove
in class WildcardMap
put
public java.lang.Object put(java.lang.Object key,
java.lang.Object value)
- Description copied from class:
WildcardMap
- The operation
put
associates the specified value
with the specified key in this map. The String representation
of the Key toString()
is
used. If the map previously
contained a mapping for this key, the old value is replaced by
the specified value.
- Overrides:
put
in class WildcardMap
- Parameters:
key
- key with which String representation the specified value
is to be associated.value
- value to be associated with the specified key.
- Returns:
- previous value associated with specified key, or null
if there was no mapping for key.
getWithExpansion
public java.lang.Object[] getWithExpansion(java.lang.Object key)
- Description copied from class:
WildcardMap
- Returns the value to which this map maps the specified
key. Additionaly return all Values which keys contain a
Wildcard and match the requested key. Returns null if the map
contains no mapping for this key.
- Overrides:
getWithExpansion
in class WildcardMap
- Parameters:
key
- key whose associated value is to be returned
- Returns:
- an Array of all Matching entries or null if no matching
entry could be found.