001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.commons.jexl2.internal;
019
020
021 import java.util.Iterator;
022 import java.util.Enumeration;
023
024 /**
025 * An Iterator wrapper for an Enumeration.
026 * @since 1.0
027 * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
028 * @version $Id: EnumerationIterator.java 889223 2009-12-10 12:05:22Z henrib $
029 * @param <T> the type of object this iterator returns
030 */
031 public class EnumerationIterator<T> implements Iterator<T> {
032 /**
033 * The enumeration to iterate over.
034 */
035 private final Enumeration<T> enumeration;
036
037 /**
038 * Creates a new iteratorwrapper instance for the specified
039 * Enumeration.
040 *
041 * @param enumer The Enumeration to wrap.
042 */
043 public EnumerationIterator(Enumeration<T> enumer) {
044 enumeration = enumer;
045 }
046
047 /**
048 * Move to next element in the array.
049 *
050 * @return The next object in the array.
051 */
052 public T next() {
053 return enumeration.nextElement();
054 }
055
056 /**
057 * Check to see if there is another element in the array.
058 *
059 * @return Whether there is another element.
060 */
061 public boolean hasNext() {
062 return enumeration.hasMoreElements();
063 }
064
065 /**
066 * Unimplemented. No analogy in Enumeration
067 */
068 public void remove() {
069 // not implemented
070 }
071 }