001    package listFW.visitor;
002    
003    import listFW.*;
004    
005    /**
006     * Copies an IList<T> using the an IListFactory<T> supplied as an input parameter 
007     * @author Mathias Ricken - Copyright 2008 - All rights reserved.
008     */
009    public class CopyList<T> implements IListAlgo<T,IList<T>, IListFactory<T>> {
010        
011        public  IMTList<T> emptyCase(IMTList<? extends T> host, IListFactory<T> ... fac) {
012            return fac[0].makeEmptyList();
013        }
014        public  INEList<T> nonEmptyCase(INEList<? extends T> host, IListFactory<T> ... fac) {
015            return ((IListFactory<T>)fac[0]).makeNEList( host.getFirst(), host.getRest().execute(this, fac)); // Generates "unchecked cast" warning
016        }
017    }