001    package org.apache.commons.ognl;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     *   http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import java.util.Enumeration;
023    import java.util.Iterator;
024    
025    /**
026     * Object that implements Iterator from an Enumeration
027     * 
028     * @author Luke Blanshard (blanshlu@netscape.net)
029     * @author Drew Davidson (drew@ognl.org)
030     */
031    public class EnumerationIterator<E>
032        implements Iterator<E>
033    {
034    
035        public static <T> Iterator<T> newIterator( Enumeration<T> e )
036        {
037            return new EnumerationIterator<T>( e );
038        }
039    
040        private final Enumeration<E> e;
041    
042        public EnumerationIterator( Enumeration<E> e )
043        {
044            this.e = e;
045        }
046    
047        public boolean hasNext()
048        {
049            return e.hasMoreElements();
050        }
051    
052        public E next()
053        {
054            return e.nextElement();
055        }
056    
057        public void remove()
058        {
059            throw new UnsupportedOperationException( "remove() not supported by Enumeration" );
060        }
061    
062    }