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
018package org.apache.commons.jexl2.internal;
019
020
021import java.util.Iterator;
022import java.util.Enumeration;
023
024/**
025 * An Iterator wrapper for an Enumeration.
026 * @param <T> the type of object this iterator returns
027 * @since 1.0
028 */
029public class EnumerationIterator<T> implements Iterator<T> {
030    /**
031     * The enumeration to iterate over.
032     */
033    private final Enumeration<T> enumeration;
034
035    /**
036     * Creates a new iteratorwrapper instance for the specified 
037     * Enumeration.
038     *
039     * @param enumer  The Enumeration to wrap.
040     */
041    public EnumerationIterator(Enumeration<T> enumer) {
042        enumeration = enumer;
043    }
044
045    /**
046     * Move to next element in the array.
047     *
048     * @return The next object in the array.
049     */
050    public T next() {
051        return enumeration.nextElement();
052    }
053    
054    /**
055     * Check to see if there is another element in the array.
056     *
057     * @return Whether there is another element.
058     */
059    public boolean hasNext() {
060        return enumeration.hasMoreElements();
061    }
062
063    /**
064     *  Unimplemented.  No analogy in Enumeration
065     */
066    public void remove() {
067        // not implemented
068    }
069}