Decorates another Map to validate that additions
match a specified predicate.
This map exists to provide validation for the decorated map.
It is normally created to decorate an empty map.
If an object cannot be added to the map, an IllegalArgumentException is thrown.
One usage would be to ensure that no null keys are added to the map.
Map map = PredicatedSet.decorate(new HashMap(), NotNullPredicate.INSTANCE, null);
Note that PredicatedMap is not synchronized and is not thread-safe.
If you wish to use this map from multiple threads concurrently, you must use
appropriate synchronization. The simplest approach is to wrap this map
using
java.util.Collections.synchronizedMap(Map) . This class may throw
exceptions when accessed by concurrent threads without synchronization.
This class is Serializable from Commons Collections 3.1.
since:
Commons Collections 3.0
version:
$Revision: 348007 $ $Date: 2005-11-21 22:52:57 +0000 (Mon, 21 Nov 2005) $
author:
Stephen Colebourne
author:
Paul Jack | 