code: 
  /*
   * 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.
   */
  /*
   * $Id$
   */
  package org.apache.xml.dtm.ref;
  
  import org.apache.xml.dtm.DTMAxisIterator;
  import org.apache.xml.dtm.DTM;
  
  
  /**
   * DTM Empty Axis Iterator. The class is immutable
   */
  public final class EmptyIterator implements DTMAxisIterator
  {
    private static final EmptyIterator INSTANCE =  new EmptyIterator();
    
    public static DTMAxisIterator  getInstance() {return INSTANCE;}
    
    private EmptyIterator(){}
    
    public final  int  next(){ return END; }  
    
    public final DTMAxisIterator reset(){ return this; }
  
    public final int getLast(){ return 0; }
  
    public final int getPosition(){ return 1; }
  
    public final void setMark(){}
  
    public final void gotoMark(){}
  
    public final DTMAxisIterator setStartNode(int node){ return this; }
  
    public final int getStartNode(){ return END; } 
    
    public final boolean isReverse(){return false;} 
    
    public final DTMAxisIterator cloneIterator(){ return this; }
    
    public final void setRestartable(boolean isRestartable) {}
    
    public final int getNodeByPosition(int position){ return END; } 
  }
  