Containers/Helpers.cs

/* $Id$
 *
 * OpenMAMA: The open middleware agnostic messaging API
 * Copyright (C) 2011 NYSE Technologies, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

using System;
using System.Collections;

namespace Wombat.Containers
{
    sealed class ReadonlyIteratorOverEnumerator : Iterator
    {
        public ReadonlyIteratorOverEnumerator(IEnumerator e)
        {
            mIEnum = e;
        }

        #region Iterator Members

        public bool hasNext()
        {
            if (!mMoved)
            {
                mMoveSucceeded = mIEnum.MoveNext();
                mMoved = true;
            }
            return mMoveSucceeded;
        }

        public object next()
        {
            mMoved = false;
            return mIEnum.Current;
        }

        public void remove()
        {
            throw new NotSupportedException();
        }

        #endregion

        private IEnumerator mIEnum;
        private bool mMoved;
        private bool mMoveSucceeded;
    }
}