Reversed.java

/*
 * DSS - Digital Signature Services
 *
 * Copyright (C) 2013 European Commission, Directorate-General Internal Market and Services (DG MARKT), B-1049 Bruxelles/Brussel
 *
 * Developed by: 2013 ARHS Developments S.A. (rue Nicolas Bové 2B, L-1253 Luxembourg) http://www.arhs-developments.com
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * "DSS - Digital Signature Services" is free software: you can redistribute it and/or modify it under the terms of
 * the GNU Lesser General Public License as published by the Free Software Foundation, either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * DSS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * "DSS - Digital Signature Services".  If not, see <http://www.gnu.org/licenses/>.
 */

package eu.europa.ec.markt.dss.validation102853.toolbox;

import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

public class Reversed<T> implements Iterable<T> {
   private final List<T> original;

   public Reversed(List<T> original) {
      this.original = original;
   }

   public Iterator<T> iterator() {
      
      final ListIterator<T> i = original.listIterator(original.size());

      return new Iterator<T>() {
         public boolean hasNext() {
            return i.hasPrevious();
         }

         public T next() {
            return i.previous();
         }

         public void remove() {
            i.remove();
         }
      };
   }

   public static <T> Reversed<T> reversed(List<T> original) {
      return new Reversed<T>(original);
   }
}