iteratoradapter.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * $Header: /sfroot/cvs/esimple/src/core/org/apache/struts/util/IteratorAdapter.java,v 1.1.1.1 2004/09/08 06:38:42 lava Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/09/08 06:38:42 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Struts", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [e-mail].
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 * 5. Products derived from this software may not be called "Apache"
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
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 */
package org.apache.struts.util;

import java.util.Iterator;
import java.util.NoSuchElementException;


/**
 * Utility method for converting Enumeration to an Iterator
 * class.  If you attempt to remove() an Object from the iterator, it will
 * throw an UnsupportedOperationException. Added for use by TagLib so
 * Enumeration can be supported
 *
 * @deprecated Use commons-collections' IteratorUtils.asIterator(Enumeration).
 * @author Sean M. Kelley
 * @author Rob Leland
 * @version $Revision: 1.1.1.1 $ $Date: 2004/09/08 06:38:42 $
 */

public class IteratorAdapter implements Iterator {
    private java.util.Enumeration enum;

    public IteratorAdapter(java.util.Enumeration enum) {
        this.enum = enum;
    }

    public boolean hasNext() {
        return enum.hasMoreElements();
   }

    public Object next() {
        if (!enum.hasMoreElements()) {
            throw new NoSuchElementException("IteratorAdaptor.next() has no more elements");
        }
        return enum.nextElement();
    }
    public void remove() {
        throw new java.lang.UnsupportedOperationException("Method IteratorAdaptor.remove() not implemented");
    }
}