OstermillerUtils
Documentation

IteratorEnumeration.java Source Code

  • Iterator_Enumeration Documentation and Examples
  • IteratorEnumeration Javadoc
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    /*
     * Converts an iterator to an enumerator.
     * Copyright (C) 2004-2010 Stephen Ostermiller
     * http://ostermiller.org/contact.pl?regarding=Java+Utilities
     * Copyright (C) 2006 Jonathan Faivre-Vuillin
     * public dot lp at free dot fr
     *
     * This program is free software; you can redistribute it and/or modify
     * it under the terms of the GNU General Public License as published by
     * the Free Software Foundation; either version 2 of the License, or
     * (at your option) any later version.
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * See LICENSE.txt for details.
     */
     
    package com.Ostermiller.util;
     
    import java.util.*;
     
    /**
     * Converts an iterator to an enumerator.
     * <p>
     * More information about this class is available from <a target="_top" href=
     * "http://ostermiller.org/utils/Iterator_Enumeration.html">ostermiller.org</a>.
     *
     * @author Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities
     * @param <ElementType> Type of element being enumerated
     * @since ostermillerutils 1.03.00
     */
    public class IteratorEnumeration<ElementType> implements Enumeration<ElementType> {
     
        /**
         * Iterator being converted to enumeration.
         */
        private Iterator<ElementType> iterator;
     
        /**
         * Create an Enumeration from an Iterator.
         *
         * @param iterator Iterator to convert to an enumeration.
         *
         * @since ostermillerutils 1.03.00
         */
        public IteratorEnumeration(Iterator<ElementType> iterator){
            this.iterator = iterator;
        }
     
        /**
         * Tests if this enumeration contains more elements.
         *
         * @return true if and only if this enumeration object contains at least
         * one more element to provide; false otherwise.
         *
         * @since ostermillerutils 1.03.00
         */
        public boolean hasMoreElements(){
            return iterator.hasNext();
        }
     
        /**
         * Returns the next element of this enumeration if this enumeration
         * object has at least one more element to provide.
         *
         * @return the next element of this enumeration.
         * @throws NoSuchElementException if no more elements exist.
         *
         * @since ostermillerutils 1.03.00
         */
        public ElementType nextElement() throws NoSuchElementException {
            return iterator.next();
        }
    }