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.xpath.XPathContext;
   
  /**
   * A class that implements this interface is a sub context node list, meaning it
   * is a node list for a location path step for a predicate.
   * @xsl.usage advanced
   */
  public interface SubContextList
  {
  
    /**
     * Get the number of nodes in the node list, which, in the XSLT 1 based 
     * counting system, is the last index position.
     *
     *
     * @param xctxt The XPath runtime context.
     *
     * @return the number of nodes in the node list.
     */
    public int getLastPos(XPathContext xctxt);
  
    /**
     * Get the current sub-context position.
     *
     * @param xctxt The XPath runtime context.
     *
     * @return The position of the current node in the list.
     */
    public int getProximityPosition(XPathContext xctxt);
  }
  