XOM API for Processing XML with Java

[Wolfgang Hoschek <whoschek AT lbl.gov>]

> > what is the garbage collection strategy?  the qnames will remain  
> > in the hashmap even after all other references have disappeared.
>
> Yep they remain in there, but only the most recently used 256  
> qnames since the map is bounded. One might better use 128, but in  
> any case it does not appear to be a problem.

This is what I mean:

    /**
     * Bounded LinkedHashMap with least-recently-used (LRU) eviction  
policy.
     */
    private static final class LRUHashMap extends  
java.util.LinkedHashMap {

        private final int maxEntries;

        private LRUHashMap(int maxEntries) {
            super(1, 0.75f, true);
            this.maxEntries = maxEntries;
        }

        protected boolean removeEldestEntry(Map.Entry eldest) {
            return size() > maxEntries;
        }

    }

IMO, there's no need for weak or soft reference complications here  
since we're just talking a small number of entries here (256 or 128).

Wolfgang.