Java tutorial
// GenericsNote: Converted. /* * Copyright 1999-2004 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.collections15.iterators; import java.util.Enumeration; import java.util.Iterator; /** * Adapter to make an {@link Iterator Iterator} instance appear to be * an {@link Enumeration Enumeration} instance. * * @author Matt Hall, John Watkinson, <a href="mailto:jstrachan@apache.org">James Strachan</a> * @version $Revision: 1.1 $ $Date: 2005/10/11 17:05:24 $ * @since Commons Collections 1.0 */ public class IteratorEnumeration<E> implements Enumeration<E> { /** * The iterator being decorated. */ private Iterator<E> iterator; /** * Constructs a new <code>IteratorEnumeration</code> that will not * function until {@link #setIterator(Iterator) setIterator} is * invoked. */ public IteratorEnumeration() { super(); } /** * Constructs a new <code>IteratorEnumeration</code> that will use * the given iterator. * * @param iterator the iterator to use */ public IteratorEnumeration(Iterator<E> iterator) { super(); this.iterator = iterator; } // Iterator interface //------------------------------------------------------------------------- /** * Returns true if the underlying iterator has more elements. * * @return true if the underlying iterator has more elements */ public boolean hasMoreElements() { return iterator.hasNext(); } /** * Returns the next element from the underlying iterator. * * @return the next element from the underlying iterator. * @throws java.util.NoSuchElementException * if the underlying iterator has no * more elements */ public E nextElement() { return iterator.next(); } // Properties //------------------------------------------------------------------------- /** * Returns the underlying iterator. * * @return the underlying iterator */ public Iterator<E> getIterator() { return iterator; } /** * Sets the underlying iterator. * * @param iterator the new underlying iterator */ public void setIterator(Iterator<E> iterator) { this.iterator = iterator; } }