public MapType(String role,
    String propertyRef,
    boolean isEmbeddedInXML) 
{
		super(role, propertyRef, isEmbeddedInXML);
}

 public Iterator getElementsIterator(Object collection) 
{
		return ( (java.util.Map) collection ).values().iterator();
}

 public Class getReturnedClass() 
{
		return Map.class;
}

 public Object indexOf(Object collection,
    Object element) 
{
		Iterator iter = ( (Map) collection ).entrySet().iterator();
		while ( iter.hasNext() ) {
			Map.Entry me = (Map.Entry) iter.next();
			//TODO: proxies!
			if ( me.getValue()==element ) return me.getKey();
		}
		return null;
}

 public Object instantiate(int anticipatedSize) 
{
		return anticipatedSize < = 0 
		       ? new HashMap()
		       : new HashMap( anticipatedSize + (int)( anticipatedSize * .75f ), .75f );
}

 public PersistentCollection instantiate(SessionImplementor session,
    CollectionPersister persister,
    Serializable key) 
{
		if ( session.getEntityMode()==EntityMode.DOM4J ) {
			return new PersistentMapElementHolder(session, persister, key);
		}
		else {
			return new PersistentMap(session);
		}
}

 public Object replaceElements(Object original,
    Object target,
    Object owner,
    Map copyCache,
    SessionImplementor session) throws HibernateException 
{
		CollectionPersister cp = session.getFactory().getCollectionPersister( getRole() );
		java.util.Map result = (java.util.Map) target;
		result.clear();
		Iterator iter = ( (java.util.Map) original ).entrySet().iterator();
		while ( iter.hasNext() ) {
			java.util.Map.Entry me = (java.util.Map.Entry) iter.next();
			Object key = cp.getIndexType().replace( me.getKey(), null, session, owner, copyCache );
			Object value = cp.getElementType().replace( me.getValue(), null, session, owner, copyCache );
			result.put(key, value);
		}
		return result;
}

 public PersistentCollection wrap(SessionImplementor session,
    Object collection) 
{
		if ( session.getEntityMode()==EntityMode.DOM4J ) {
			return new PersistentMapElementHolder( session, (Element) collection );
		}
		else {
			return new PersistentMap( session, (java.util.Map) collection );
		}
}