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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 org.apache.commons.collections4.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.
	*
	* @since 1.0
	*/
	public class IteratorEnumeration<E> implements Enumeration<E> {

	/** The iterator being decorated. */
	private Iterator<? extends E> iterator;

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

	/**
	* Constructs a new <code>IteratorEnumeration</code> that will use the given
	* iterator.
	*
	* @param iterator the iterator to use
	*/
	public IteratorEnumeration(final Iterator<? extends E> 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<? extends E> getIterator() {
	return iterator;
	}

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

	}

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