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     * @param <T> the type of object this iterator returns
027     * @since 1.0
028     */
029    public 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    }