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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * 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 com.feilong.lib.collection4.iterators;

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

/**
 * Adapter to make an {@link Iterator Iterator} instance appear to be an
 * {@link Enumeration Enumeration} instance.
 * 
 * @param 
 *
 * @since 1.0
 */
public class IteratorEnumeration implements Enumeration{

    /** The iterator being decorated. */
    private Iterator iterator;

    /**
     * Constructs a new IteratorEnumeration that will not function
     * until {@link #setIterator(Iterator) setIterator} is invoked.
     */
    public IteratorEnumeration(){
    }

    /**
     * Constructs a new IteratorEnumeration that will use the given
     * iterator.
     *
     * @param iterator
     *            the iterator to use
     */
    public IteratorEnumeration(final Iterator iterator){
        this.iterator = iterator;
    }

    // Iterator interface
    //-------------------------------------------------------------------------

    /**
     * Returns true if the underlying iterator has more elements.
     *
     * @return true if the underlying iterator has more elements
     */
    @Override
    public boolean hasMoreElements(){
        return iterator.hasNext();
    }

    /**
     * Returns the next element from the underlying iterator.
     *
     * @return the next element from the underlying iterator.
     * @throws java.util.NoSuchElementException
     *             if the underlying iterator has
     *             no more elements
     */
    @Override
    public E nextElement(){
        return iterator.next();
    }

    // Properties
    //-------------------------------------------------------------------------

    /**
     * Returns the underlying iterator.
     *
     * @return the underlying iterator
     */
    public Iterator getIterator(){
        return iterator;
    }

    /**
     * Sets the underlying iterator.
     *
     * @param iterator
     *            the new underlying iterator
     */
    public void setIterator(final Iterator iterator){
        this.iterator = iterator;
    }

}