public UnionSubclass(PersistentClass superclass) 
{
		super(superclass);
}

 public Object accept(PersistentClassVisitor mv) 
{
		return mv.accept(this);
}

 public Table getIdentityTable() 
{
		return getTable();
}

 protected Iterator getNonDuplicatedPropertyIterator() 
{
		return getPropertyClosureIterator();
}

 public Set getSynchronizedTables() 
{
		return synchronizedTables;
}

 public Table getTable() 
{
		return table;
}

 public  void setTable(Table table) 
{
		this.table = table;
		getSuperclass().addSubclassTable(table);
}

 public  void validate(Mapping mapping) throws MappingException 
{
		super.validate(mapping);
		if ( key!=null && !key.isValid(mapping) ) {
			throw new MappingException(
				"subclass key mapping has wrong number of columns: " +
				getEntityName() +
				" type: " +
				key.getType().getName()
			);
		}
}