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Jexl is an implementation of the JSTL Expression Language with extensions.

There is a newer version: 2.1.1

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.jexl2.internal;


import java.util.Iterator;
import java.util.Enumeration;

/**
 * An Iterator wrapper for an Enumeration.
 * @since 1.0
 * @author Geir Magnusson Jr.
 * @version $Id: EnumerationIterator.java 889223 2009-12-10 12:05:22Z henrib $
 * @param  the type of object this iterator returns
 */
public class EnumerationIterator implements Iterator {
    /**
     * The enumeration to iterate over.
     */
    private final Enumeration enumeration;

    /**
     * Creates a new iteratorwrapper instance for the specified 
     * Enumeration.
     *
     * @param enumer  The Enumeration to wrap.
     */
    public EnumerationIterator(Enumeration enumer) {
        enumeration = enumer;
    }

    /**
     * Move to next element in the array.
     *
     * @return The next object in the array.
     */
    public T next() {
        return enumeration.nextElement();
    }
    
    /**
     * Check to see if there is another element in the array.
     *
     * @return Whether there is another element.
     */
    public boolean hasNext() {
        return enumeration.hasMoreElements();
    }

    /**
     *  Unimplemented.  No analogy in Enumeration
     */
    public void remove() {
        // not implemented
    }
}