    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    }