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    1   /*
    2    * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    3    *
    4    * This software is open source.
    5    * See the bottom of this file for the licence.
    6    */
    7
    8   package org.dom4j.tree;
    9
    10  import java.util.Iterator;
    11
    12  /***
    13   * <p>
    14   * <code>SingleIterator</code> is an {@link Iterator}over a single object
    15   * instance.
    16   * </p>
    17   *
    18   * @author <a href="mailto:james.strachan@metastuff.com">James Strachan </a>
    19   * @version $Revision: 1.9 $
    20   */
    21  public class SingleIterator implements Iterator {
    22      private boolean first = true;
    23
    24      private Object object;
    25
    26      public SingleIterator(Object object) {
    27          this.object = object;
    28      }
    29
    30      public boolean hasNext() {
    31          return first;
    32      }
    33
    34      public Object next() {
    35          Object answer = object;
    36          object = null;
    37          first = false;
    38
    39          return answer;
    40      }
    41
    42      public void remove() {
    43          throw new UnsupportedOperationException("remove() is not supported by "
    44                  + "this iterator");
    45      }
    46  }
    47
    48  /*
    49   * Redistribution and use of this software and associated documentation
    50   * ("Software"), with or without modification, are permitted provided that the
    51   * following conditions are met:
    52   *
    53   * 1. Redistributions of source code must retain copyright statements and
    54   * notices. Redistributions must also contain a copy of this document.
    55   *
    56   * 2. Redistributions in binary form must reproduce the above copyright notice,
    57   * this list of conditions and the following disclaimer in the documentation
    58   * and/or other materials provided with the distribution.
    59   *
    60   * 3. The name "DOM4J" must not be used to endorse or promote products derived
    61   * from this Software without prior written permission of MetaStuff, Ltd. For
    62   * written permission, please contact dom4j-info@metastuff.com.
    63   *
    64   * 4. Products derived from this Software may not be called "DOM4J" nor may
    65   * "DOM4J" appear in their names without prior written permission of MetaStuff,
    66   * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
    67   *
    68   * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
    69   *
    70   * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
    71   * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    72   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    73   * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
    74   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    75   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    76   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    77   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    78   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    79   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    80   * POSSIBILITY OF SUCH DAMAGE.
    81   *
    82   * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    83   */