Java tutorial
/* * JBoss, Home of Professional Open Source * Copyright 2005, JBoss Inc., and individual contributors as indicated * by the @authors tag. See the copyright.txt in the distribution for a * full listing of individual contributors. * * This 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. * * This software 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 this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ import java.util.ArrayList; import java.util.Collection; import java.util.Enumeration; import java.util.NoSuchElementException; /** * ??? * * @author ??? * @version $Revision: 2800 $ */ @SuppressWarnings("unchecked") public class SerializableEnumeration extends ArrayList implements Enumeration { /** The serialVersionUID */ private static final long serialVersionUID = 8678951571196067510L; private int index; public SerializableEnumeration() { index = 0; } public SerializableEnumeration(Collection c) { super(c); index = 0; } public SerializableEnumeration(int initialCapacity) { super(initialCapacity); index = 0; } public boolean hasMoreElements() { return (index < size()); } public Object nextElement() throws NoSuchElementException { try { Object nextObj = get(index); index++; return nextObj; } catch (IndexOutOfBoundsException e) { throw new NoSuchElementException(); } } private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException { // the only thing to write is the index field out.defaultWriteObject(); } private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException { in.defaultReadObject(); } }