Package org.zkoss.bind.impl

Class WeakIdentityMap<K,V>

java.lang.Object
java.util.AbstractMap<K,V>
org.zkoss.bind.impl.WeakIdentityMap<K,V>
All Implemented Interfaces:
Map<K,V>
public class WeakIdentityMap<K,V> extends AbstractMap<K,V> implements Map<K,V>
WeakIdentityMap is like WeakHashMap, except it uses a key's identity hashcode and equals methods. WeakIdentityMap is not thread-safe and must be wrapped with Collections.synchronizedMap to be made thread-safe.

The documentation for WeakHashMap states that it is intended primarily for use with key objects whose equals methods test for object identity using the == operator. Because WeakIdentityMap strictly follows this behavior, it is better suited for this purpose.

Note: Weakly referenced entries may be automatically removed during either accessor or mutator operations, possibly causing a concurrent modification to be detected. Therefore, even if multiple threads are only accessing this map, be sure to synchronize this map first. Also, do not rely on the value returned by size() when using an iterator from this map. The iterators may return less entries than the amount reported by size().

Since:
6.0.0
Author:
Brian S O'Neill