XML Server Getting Started    

  /** 

   * Use an XPath string to select a single node. 

   * XPath namespace prefixes are resolved from the namespaceNode. 

   * 

   * @param contextNode The node to start searching from. 

   * @param str A valid XPath string. 

   * @param namespaceNode The node from which prefixes in the XPath will be resolved to namespaces. 

   * @return The first node found that matches the XPath, or null. 

   */ 

  public Node selectSingleNode(Node contextNode, String str, Node namespaceNode) 

    throws SAXException 

  { 

    // Have the XObject return its result as a NodeSet. 

    NodeList nl = selectNodeList(contextNode, str, namespaceNode); 

    // Return the first node, or null 

    return (nl.getLength() > 0) ? nl.item(0) : null; 

  } 

 /** 

   * Use an XPath string to select a nodelist. 

   * XPath namespace prefixes are resolved from the context Node. 

   * 

   * @param contextNode The node to start searching from. 

   * @param str A valid XPath string. 

   * @return A nodelist, should never be null. 

   */ 

  public NodeList selectNodeList(Node contextNode, String str) 

    throws SAXException 

  { 

    return selectNodeList(contextNode, str, contextNode); 

  } 

 /** 

   * Use an XPath string to select a nodelist. 

   * XPath namespace prefixes are resolved from the namespaceNode. 

   * 

   * @param contextNode The node to start searching from. 

   * @param str A valid XPath string. 

   * @param namespaceNode The node from which prefixes in the XPath will be resolved to namespaces. 

   * @return A nodelist, should never be null. 

   */ 

  public NodeList selectNodeList(Node contextNode, String str, Node namespaceNode) 

    throws SAXException 

  { 

    // Execute the XPath, and have it return the result 

    XObject list = executeXPath(contextNode, str, namespaceNode); 

    // Have the XObject return its result as a NodeSet. 

    return list.nodeset(); 

  } 

 2000 2002 Computer Technology Inc. All rights reserved. 

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