}
    private int getDceReferent(Object obj) {
        Entry e;

        if (referents == null) {
            referents = new HashMap();
            referent = 1;
        }

        if ((e = (Entry)referents.get(obj)) == null) {
            e = new Entry();
            e.referent = referent++;
            e.obj = obj;
            referents.put(obj, e);
        }

        return e.referent;

    private Map<Object, Entry> referents;

    private static class Entry {

        public Entry ( int referent, Object obj ) {
            this.referent = referent;
            this.obj = obj;
        }

        final int referent;

        @SuppressWarnings ( "unused" )
        private final Object obj;
    }

    public byte[] buf;
    public int start;
    public int index;
    public int length;