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 }