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.xpath.axes;
  
  import org.apache.xml.dtm.DTM;
  import org.apache.xpath.compiler.Compiler;
  
  /**
   * This class implements an optimized iterator for
   * attribute axes patterns.
   * @see org.apache.xpath.axes#ChildTestIterator
   * @xsl.usage advanced
   */
  public class AttributeIterator extends ChildTestIterator
  {
      static final long serialVersionUID = -8417986700712229686L;
  
    /**
     * Create a AttributeIterator object.
     *
     * @param compiler A reference to the Compiler that contains the op map.
     * @param opPos The position within the op map, which contains the
     * location path expression for this itterator.
     *
     * @throws javax.xml.transform.TransformerException
     */
    AttributeIterator(Compiler compiler, int opPos, int analysis)
            throws javax.xml.transform.TransformerException
    {
      super(compiler, opPos, analysis);
    }
      
    /**
     * Get the next node via getFirstAttribute && getNextAttribute.
     */
    protected int getNextNode()
    {
      m_lastFetched = (DTM.NULL == m_lastFetched)
                       ? m_cdtm.getFirstAttribute(m_context)
                       : m_cdtm.getNextAttribute(m_lastFetched);
      return m_lastFetched;
    }
    
    /**
     * Returns the axis being iterated, if it is known.
     * 
     * @return Axis.CHILD, etc., or -1 if the axis is not known or is of multiple 
     * types.
     */
    public int getAxis()
    {
      return org.apache.xml.dtm.Axis.ATTRIBUTE;
    }
  
  
  
  }
  