xsl 里增加



   function valueOf(context, elem) {

    return tools.valueOf(context, elem);

   }

代碼里增加





 public String valueOf(XSLProcessorContext context, ElemExtensionCall elem) {

  String value = elem.getAttribute("select");

  String maxStr = elem.getAttribute("max");

  try {

   value = executeExpression(context, elem, value);

  } catch (TransformerException e) {

  }

  if (isNotBlank(maxStr)) {

   try {

    int max = Integer.parseInt(maxStr);

    value = shortStr(value, max);

   } finally {

   }

  }

  return value;

 }
 private String executeExpression(XSLProcessorContext context, ElemExtensionCall elem, String value)

   throws TransformerException {

  XPathContext xctxt = context.getTransformer().getXPathContext();

  XPath path = new XPath(value, elem, xctxt.getNamespaceContext(), XPath.SELECT);

  XObject data = path.execute(xctxt, context.getContextNode(), elem);

  if (data != null)

   value = data.xstr().toString();

  return value == null ? "" : value;

 }
























參考了下面的文檔













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List:       xalan-j-users
Subject:    Re: Extension element with subelements
From:       John Gentilin <gentijo () eyecatching ! com>
Date:       2007-09-07 21:48:37
Message-ID: 46E1C735.2080504 () eyecatching ! com
[Download message RAW]
Oops... this might be what you are after instead...
executeChildTemplatesToXML or ToString or ToXMLString
may be what you are after..
/**
* A repository for common functions that can be used but the extension
* functions and extension elements.
*
*
* Title:       Base Functions
* Copyright:   Copyright (c) 2005
* Company:     Eye Catching Solutions Inc.
* @version     1.0
* @author      John Gentilin
*/
public class BaseFunctions
{
private static Category m_Log =
Category.getInstance("RapidXSL.Interface");
private static DocumentBuilderFactory  m_dfactory = null;
private static DocumentBuilder  m_docBuilder = null;
/**
* @param context
* @param elem
* @throws TransformerException
*/
protected void executeChildTemplates( XSLProcessorContext context,
ElemExtensionCall elem ) throws TransformerException
{
TransformerImpl transf = context.getTransformer();
transf.executeChildTemplates(elem,
context.getContextNode(),
context.getMode(), transf.getResultTreeHandler());
}
/**
* @param context
* @param elem
* @throws TransformerException
*/
protected Document executeChildTemplatesToXML(Document doc,
XSLProcessorContext context, ElemExtensionCall elem ) throws
XMLServerException
{
DOMBuilder builder = null;
TransformerImpl transformer = context.getTransformer();
try
{
builder = new DOMBuilder(doc);
transformer.executeChildTemplates(elem,
context.getContextNode(),
context.getMode(), builder);
}
catch (Exception e)
{
throw new XMLServerException("RXSL_IFACE", "XSL Interface Error -
" + e.getLocalizedMessage());
}
return doc;
}
/**
* @param context
* @param elem
* @throws TransformerException
*/
protected String executeChildTemplatesToString(XSLProcessorContext
context, ElemExtensionCall elem ) throws XMLServerException
{
TransformerImpl transformer = context.getTransformer();
try
{
TextSerializationHandler handler = new TextSerializationHandler();
transformer.executeChildTemplates(elem,
context.getContextNode(),
context.getMode(), handler);
return handler.toString();
}
catch (Exception e)
{
throw new XMLServerException("RXSL_IFACE", "XSL Interface Error -
" + e.getLocalizedMessage());
}
}
protected String executeChildTemplatestoXMLString(XSLProcessorContext
context, ElemExtensionCall elem)
throws TransformerException, SAXException
{
try
{
TransformerImpl transformer = context.getTransformer();
// This should be worked on so that the output format can be
// defined by a first child of the redirect element.
OutputProperties format = transformer.getOutputFormat();
Properties prop = format.getProperties();
format.setProperty("indent","no");
format.setProperty("{[prev in list] [next in list] [prev in thread] [next in thread]